JPH06324052A - Sample cup and auto sampler and analyzer with auto sampler - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sample cup that can prevent sample contamination and prevent contamination of the surrounding area by the sample. [Structure] A cup body 2 having an open top for accommodating a sample 5, a lid 4 detachably attached so as to close an opening 3 of the cup body 2, and a drive mechanism provided on the lid 4. An opening / closing unit 10 (shutter 14) which is controlled to open / close by a light emitting device 27 and a light receiving device 2 which detect the sampling nozzle 43 approaching the opening / closing unit 10 from the outside.
It consists of 8 sensors. If even a part of the light beam 29 is blocked, the shutter 14 opens while being blocked by the signal from the sensor. Since the shutter 14 is closed, the sample 5 is not contaminated by the surrounding atmosphere or dust. Further, it is possible to prevent surrounding contamination due to evaporation of the sample 5 in the sample cup 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample cup used in a technique for analyzing trace substances, an autosampler equipped with the sample cup, and an analyzer with an autosampler.

[0002]

2. Description of the Related Art A flameless atomic absorption spectrophotometer is used as one of analyzers for trace substances. For the flameless atomic absorption spectrophotometer, for example, "Hitachi Kenron", No. 11 of 1991, issued by Hitachi Hyoronsha, November 25, the same year, P31
~ P38. In the same document, the polarization Zeeman atomic absorption spectrophotometer (frameless atomic absorption spectrophotometer) required skill to inject the sample into the high temperature furnace, but the automatic measurement function of the autosampler realized high accuracy and high operability. It is stated that it does.

A flameless atomic absorption spectrophotometer is described in Japanese Utility Model Laid-Open No. 178353/1987. This flameless atomic absorption spectrophotometer has a structure in which a cover is provided and harmful gas generated when the cuvette is heated is exhausted to the outside of the device through an exhaust duct or the like. In addition, Japanese Patent Application No. 4-208344
No. (filed August 5, 1992) describes a flameless atomic absorption spectrophotometer having an autosampler. This flameless atomic absorption spectrophotometer has a structure in which a dustproof cover is installed on the top of the atomizer and the autosampler, and a purging gas such as an inert gas is made to flow inside the cover so that dust inside the laboratory is It prevents the decrease of analysis accuracy caused by dropping into the sample cup or cuvette inside the atomizer. In addition, this frameless atomic absorption spectrophotometer, the tip of the nozzle is inserted into the sample cup attached to the turntable of the autosampler,
The structure is such that the sample contained in the sample cup is sucked and then supplied to the cuvette of the flameless atomic absorption spectrophotometer. The sample cup has an open top.

Generally, a sample cup for containing a sample for analysis is a container having an open top. Hitachi Hyoronsha, Ltd. "Hitachi Hyoron", No. 11, 1991, issued November 25, the same year, P1 to P8, describes a small blood automatic analyzer. In this device, many sample containers are arranged on a sample disk. Further, as the sample container, a container having a large upper portion, a container having a collar, and a simple cup-shaped container are illustrated.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In an apparatus for analyzing a trace substance such as a flameless atomic absorption spectrophotometer, ppb to p
Perform sensitive analysis of pt levels. Therefore, the analysis accuracy is greatly affected by the surrounding atmosphere, dust, and pollutants (dust) generated from the human body. Therefore, in some frameless atomic absorption spectrophotometers, as shown in the above-mentioned document, harmful gas generated during heating of the cuvette is discharged to the outside of the device through an exhaust duct or the like to prevent contamination of the space area including the cuvette. , We are trying to improve the analysis accuracy.

[0006] However, the sample cup mounted on the autosampler does not have a lid and has an open top. As a result, foreign matter is likely to enter the sample cup, and the sample is likely to be contaminated by the surrounding atmosphere and dust. Also, since the auto sampler has an open top,
The sample evaporates and pollutes the surrounding atmosphere. In an autosampler in which a large number of sample cups are lined up, the evaporation mist generated by evaporation remixes into another sample cup and contaminates the sample. That is, in the conventional autosampler, another sample is contaminated with another sample. Furthermore, even with an autosampler and frameless atomic absorption spectrophotometer integrated and covered with the same cover,
In the same cover, there is a possibility that the sample may contaminate another sample or the cuvette part. in this way,
In the conventional sample cup and autosampler, and also in the frameless atomic absorption spectrophotometer with an autosampler that integrates the autosampler and analytical mounting, it is possible to prevent contamination of the sample in the sample cup and other problems caused by the sample in the sample cup. Particularly effective measures have not been taken for measures against contamination of samples and contamination of the surrounding atmosphere.

It is an object of the present invention to provide a sample cup capable of preventing contamination of the contained sample, contamination of the surrounding atmosphere by the contained sample, and contamination of the sample in another adjacent sample cup.

Another object of the present invention is to provide a sample cup and an autosampler which contributes to improvement of analysis accuracy.

Another object of the present invention is to provide an autosampler and an analyzer with an autosampler which can prevent contamination between samples and contamination of the surrounding atmosphere.

Another object of the present invention is to provide an analyzer with an autosampler which can improve the accuracy of analysis. The above and other objects and novel features of the present invention will be apparent from the description of the present specification and the accompanying drawings.

[0011]

The outline of the representative ones of the inventions disclosed in the present application will be briefly described as follows. That is, the sample cup of the present invention comprises a cup body having an open upper portion for containing a sample, and a lid body detachably attached to the cup body so as to close the opening of the cup body. A shutter mechanism is provided at the center of the lid. The shutter mechanism includes a shutter that serves as an opening / closing unit and a drive mechanism that opens and closes the shutter. Further, a light emitting device is arranged on the lid so that the light beam crosses above the shutter, and a light receiving device for receiving the light beam emitted from the light emitting device is arranged. The drive mechanism of the shutter mechanism is driven by the information (signal) from the light receiving device to open the shutter. This signal is transmitted when the tip of the sampling nozzle enters the light beam and the light intensity detected by the light receiving device is lowered. A switch is attached to the lid, and when the switch is turned on (ON), a light beam is emitted from the light emitting device, and the shutter mechanism can be operated at any time.

The autosampler of the present invention comprises an apparatus body,
A rotation-controlled turntable provided in the main body of the apparatus and having a plurality of sample cup accommodating parts, and a tip of a sampling nozzle is inserted into the cup main body of the turntable to adsorb and hold a sample in the sample cup and And a sample supply mechanism for supplying a sample to the analyzer. The sample cup is composed of a cup body having an open upper portion for containing a sample, and a lid body detachably attached to the cup body so as to close the opening of the cup body. A shutter mechanism is provided at the center of the lid. The shutter mechanism includes a shutter that serves as an opening / closing unit and a drive mechanism that opens and closes the shutter. Further, a light emitting device is arranged on the lid so that the light beam crosses above the shutter, and a light receiving device for receiving the light beam emitted from the light emitting device is arranged. The drive mechanism of the shutter mechanism is driven by the information (signal) from the light receiving device to open the shutter. This signal is transmitted when the tip of the sampling nozzle enters the light beam and the light intensity detected by the light receiving device is lowered. A switch is attached to the lid, and this switch is turned on (O
In the state of N), a light flux is emitted from the light emitting device, and the shutter mechanism can be operated at any time.

The analyzer with an autosampler of the present invention includes an analyzer and a sample cup which is formed integrally with the analyzer and is mounted on a turntable to insert a sampling nozzle into the sample and suck the sample. It has a structure including an autosampler for supplying a sample to the sample mounting portion and a cover for covering the analyzer and the autosampler. A plurality of sample cups are mounted on the turntable. The sample cup is composed of a cup body with an open top for containing a sample, and a lid body detachably attached to the cup body so as to close the opening of the cup body. A shutter mechanism is provided at the center of the lid. The shutter mechanism includes a shutter that serves as an opening / closing unit and a drive mechanism that opens and closes the shutter. Further, a light emitting device is arranged on the lid so that the light beam crosses above the shutter, and a light receiving device for receiving the light beam emitted from the light emitting device is arranged. The drive mechanism of the shutter mechanism is driven by the information (signal) from the light receiving device to open the shutter. This signal is transmitted when the tip of the sampling nozzle enters the light beam and the light intensity detected by the light receiving device is lowered. A switch is attached to the lid, and this switch is turned on (O
In the state of N), a light flux is emitted from the light emitting device, and the shutter mechanism can be operated at any time.

[0014]

In the sample cup of the present invention, when the sensor detects a sampling nozzle approaching the opening / closing part, the shutter which is the opening / closing part is opened, and the sample can be sucked by the sampling nozzle. When the sampling nozzle moves out of the light flux and moves, the shutter has a structure that closes. That is, the sample cup of the present invention has a structure that opens only while the sampling nozzle approaches the opening / closing portion and continues to be detected by the sensor,
Since the sample cup contains the sample in an airtight manner at all times, it is possible to prevent the sample from being contaminated by the surrounding atmosphere and dust, and also prevent the sample from being evaporated into the atmosphere. Therefore, it can contribute to the improvement of the analysis precision in the analyzer using this sample cup.

In the autosampler of the present invention, a plurality of sample cups are mounted on the turntable. The sample cup opens only while the sampling nozzle approaches the opening / closing part and continues to be detected by the sensor to suck the sample. Since the structure is made possible, it is possible to prevent the sample from being contaminated by the surrounding atmosphere and dust, and it is also possible to prevent the sample from evaporating to the outside of the sample cup. Further, it is possible to prevent mutual contamination of the samples in the sample cup. Therefore, it can contribute to the improvement of the analysis precision in the analyzer using this autosampler.

In the analyzer with auto sampler of the present invention, the plurality of sample cups mounted on the turn table of the auto sampler are opened only while the sampling nozzle is close to the opening / closing part and is continuously detected by the sensor, and the sample can be sucked. With this structure, it is possible to prevent the sample from being contaminated by the surrounding atmosphere and dust, and also to prevent the sample from evaporating to the outside of the sample cup. Nor. Therefore, in the analyzer with the autosampler of the present invention, it is possible to prevent the contamination caused by the mutual samples in the sample cup and the contamination caused by the other sample in the sample mounting portion of the analyzer. As a result, improvement in analysis accuracy of the analyzer with an autosampler of the present invention can be achieved.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sample cup according to an embodiment of the present invention and its usage will be described below with reference to the drawings.
FIG. 1 is a perspective view of a sample cup according to an embodiment of the present invention, FIG. 2 is a plan view showing a part of the inside of the lid, which is partially cut away, and FIG. 3 is a schematic view showing a shutter mechanism.
Is also a cross-sectional view of the sample cup, FIG. 5 is a circuit diagram for similarly controlling the opening / closing of the opening / closing portion, FIG. 6 is a schematic diagram showing an outline of the autosampler of the present invention, and FIG. 7 is an outline of the analyzer with an autosampler of the present invention. It is a schematic diagram which shows.

As shown in FIGS. 1 and 4, the sample cup 1 of the present invention has a cylindrical cup body 2 having an open top and a lid body detachably attached to the upper opening 3 of the cup body 2. It consists of 4. The cup body 2 is made of tetrafluoroethylene having excellent chemical resistance,
A sample 5 made of a liquid is accommodated. The sample 5 is, for example, a processed chemical solution used in the manufacture of a semiconductor device, and is used for analyzing differences in components from the chemical solution before use. Further, a flange 6 is provided at a midway height of the outer peripheral surface of the cup body 2. The collar 6 has a function of allowing the cup body 2 to be mounted on the turntable 37 by being caught by the edge of the mounting hole 39 when the cup body 2 is inserted into the mounting hole 39 or the like of the turntable 37 of the autosampler 35 described later. To do.

The lid body 4 is a donut body having an opening 7 in the central portion, and the inside is hollow. The lid 4 is also formed of ethylene tetrafluoride having excellent chemical resistance. Each component is arranged in the hollow portion of the lid body 4. The opening 7 is a hole into which the tip portion of the sampling nozzle 43 for collecting the sample 5 in the sample cup 1 is inserted. In the sample cup 1 of the present invention, the opening 7 is opened / closed by the opening / closing section 10 and is opened / closed by the drive mechanism 11. The opening / closing part 10 and the drive mechanism 11 are
For example, the shutter mechanism 12 is used.

As shown in FIG. 3, the shutter mechanism 12 has a shutter 14 composed of a plurality of shutter claws 13 arranged on the same circumference like a petal. The shutter claw 13 is formed of a thin metal plate, and the surface thereof is covered with a coating film of tetrafluoroethylene having excellent chemical resistance. Further, the shutter claw 13 having a substantially triangular shape, which is composed of an arc portion with a part protruding and an arc portion with a part recessed, is configured to rotate about the support shaft 15. Each support shaft 15 is located on the same circumference and is fixed to the bottom plate 9 of the lid body 4. The corners formed by the protruding arc and the depressed arc are fixed to the wires 16 arranged concentrically. This wire 1
The surface of No. 6 is also coated with a coating film of tetrafluoroethylene having excellent chemical resistance. One end of this wire 16 is attached to a pin 17 fixed to the bottom plate 9 of the lid body 4 via a coil spring 19. The other end of the wire 16 is fixed to a pulley 22 attached to a drive shaft 21 of a drive motor 20 arranged on the bottom plate 9 of the lid body 4. Then, the coil spring 19 causes the pin 1
The shutter claws 13 biased in the seven directions close each other to completely close the opening 7. Further, when the drive motor 20 is operated to rotate the drive shaft 21 in the forward direction, the wire 16 is sequentially wound around the pulley 22, and each shutter claw 13 is centered on the support shaft 15 and is indicated by a chain double-dashed line. When the shutter claw group is rotated clockwise, a through-hole 23 having a regular octagonal shape is formed at the center of the shutter claw group as shown by a chain double-dashed line. The sampling nozzle 43 is provided in the through hole 23.
Can be inserted without touching the shutter claw 13. When the drive motor 20 is rotated in the reverse direction, the wire 16 is moved in the counterclockwise direction by the restoring force of the coil spring 19,
Each shutter claw 13 is closed and the through hole 23 disappears. The shutter 14 of the shutter mechanism 12 and the wire 16, coil spring 19, and pin 17 associated therewith serve as the opening / closing portion 10, and the drive motor 20 and the wire 16, coil spring 19 and the like associated therewith serve as the drive mechanism 11.

As shown in FIG. 2 and FIG. 4, the shutter 14 is inserted and disposed in a slit portion provided on the inner wall 24 of the lid 4 so as to extend over the entire circumference. As shown in FIG. 2, a battery 25 serving as a power source for driving the drive motor 20 is provided in the lid body 4. Further, two housings 26 are provided on the upper surface of the lid body 4 so as to face each other. A light emitting device 27 including a light emitting diode or the like is built in one housing 26, and a light receiving device 28 is built in the other housing 26 to form a sensor. The light emitting surface of the light emitting device 27 and the light receiving surface of the light receiving device 28 face each other, and the central portion of the lid 4 in which the through hole 23 is formed is located in the middle thereof. Light (light flux) 29 is emitted from the light emitting surface of the light emitting device 27.
Is emitted, and the light receiving device 28 receives the light flux 29. A switch 30 is provided on the lid body 4.

FIG. 5 shows an outline of the electric circuit of the sample cup 1 of the present invention. The light emitting device 27, the battery 25, and the switch 30 are connected in series to form a closed circuit. In addition, the battery 25, the switch 30, the relay 3
1 and the drive motor 20 are connected in series to form a closed circuit. The light receiving device 28 also sends a signal to the relay 31. Therefore, when the switch 30 is turned on (ON), the light 29 is emitted from the light emitting device 27. This light 29 is detected by the light receiving device 28.
If this light 29 is partially blocked by the tip of the sampling nozzle 43, the amount of light reaching the light receiving device 28 decreases, and the detection output of the light receiving device 28 decreases. The relay 31 is actuated by the signal resulting from the decrease in the detection output, and the drive motor 20 is driven to rotate normally. As a result, the shutter 14 of the shutter mechanism 12 is opened and the through hole 23 is formed. Therefore, if the sampling nozzle 43 continues to descend, the tip enters the sample 5 as shown in FIG. As a result, the sample 5 can be sucked into the sampling nozzle 43. When the sampling nozzle 43 rises, there is nothing that blocks the light 29, and the light receiving device 2
The amount of light detected at 8 is high. Therefore, the relay 31
Is driven, the drive motor 20 is driven to rotate in the reverse direction, and the shutter mechanism 12 is closed. When the shutter mechanism 12 is closed, even if the sample 5 evaporates, the evaporation mist does not leak out of the sample cup 1. Although not shown, a sponge-like elastic seal is interposed between the shutter claw 13 and the slit surface of the inner wall 24, so that the evaporation mist of the sample is contained in the hollow portion of the cup body 2. This prevents the components from mixing in and prevents corrosion of each component inside the lid 4.

The sample cup 1 of the present invention as described above is
Since the opening 3 is normally closed by the shutter mechanism 12 of the lid 4, contamination due to the surrounding atmosphere and dust mixing can be prevented, and the surrounding atmosphere is not contaminated by the evaporation mist of the sample.

FIG. 6 is a schematic front view showing an autosampler 35 for supplying a sample to a flameless atomic absorption spectrophotometer (analyzer) 50 which is one of the usage modes of the sample cup 1 of the present invention. The auto sampler 35 is the device body 3
6 has a turntable 37 on it. The turntable 37 is supported by a rotary shaft 38, and its rotation is controlled by a drive mechanism (not shown). The turntable 37 is provided with a large number of mounting holes 39 into which the sample cup 1 is inserted and mounted. The sample cup 1 is supported by the turntable 37 in a state in which the cup body 2 enters the mounting hole 39 and the collar 6 rides on the edge of the mounting hole 39. On the other hand, the apparatus body 36 is provided with a sample supply mechanism 40 for mounting the sample 5 on the sample mounting portion of the analyzer, in this embodiment, the sample mounting portion (cuvette) 54 of the flameless atomic absorption spectrophotometer 50. There is.

The sample supply mechanism 40 is attached to the upper surface of one side of the apparatus main body 36, and is attached to a drive shaft 41 which can be raised and lowered and rotated, and an upper end portion of the drive shaft 41.
Also, an arm 42 having its tip facing the turntable 37, a sampling nozzle 43 attached to the arm 42, and an upper end of the sampling nozzle 43 are connected in communication with each other, and the other end of the arm 42 passes through the drive shaft 41. And a tube 44 that enters the apparatus main body 36. The tube 44 is connected to a pump system (not shown). By driving this pump system, the sample 5 is sucked in or discharged from the sampling nozzle 43.

The flameless atomic absorption spectrophotometer 50 comprises an apparatus main body 51 and an atomizer 52. The atomization device 52 is provided with a lid 53 that can be opened and closed on the upper surface thereof, and a cuvette (sample mounting portion) 54 for mounting the sample 5 is located below the lid 53 when the lid 53 is opened. Since the present invention relates to the supply of the sample 5 by the sample cup 1 or the autosampler 35, detailed description of the autosampler 35 and the flameless atomic absorption spectrophotometer 50 will be omitted.

In such an auto sampler 35,
Before the sample analysis work, switch 30 of each sample cup 1
Is turned on. Then, the sample analysis work is started. In the analysis work, the sample supply mechanism 40 operates and the sampling nozzle 43 descends into the predetermined sample cup 1 of the turntable 37. When the sampling nozzle 43 descends and the tip (lower end) of the sample cup 1 approaches the opening 3 of the lid 4 of the sample cup 1 and enters the light beam 29, the detection output detected by the light receiving device 28 decreases. To do. Then, the drive motor 20 is rotated in the forward direction to open the shutter 14, and the through hole 23 is formed as shown in FIGS. 3 and 4. Then, when the through hole 23 is formed, the sampling nozzle 43 passes through the through hole 23 and exposes the tip inside the sample 5. After that, a certain amount of the sample 5 is sucked into the sampling nozzle 43, and the sampling nozzle 43 moves up. Light flux 2 by sampling nozzle 43
The light-receiving device 2 for detecting the light flux 29 when the blocking of 9 is removed
The detection output of 8 returns to the initial intensity, and receives this signal,
The drive motor 20 is driven in reverse rotation. by this,
The shutter 14 of the lid 4 is closed, and the opening 3 is surely closed. The sampling nozzle 43 is controlled to move to the flameless atomic absorption spectrophotometer 50 side, and the sample 5 is discharged and supplied to the cuvette 54 that appears when the lid 53 is opened. After that, the lid 53 is closed and the sample 5 is removed by the atomizer 52.
Is analyzed.

FIG. 7 shows one of the usage modes of the sample cup 1 of the present invention. A flameless atomic absorption spectrophotometer (analyzer) 50 and an autosampler 35 for supplying a sample to the frameless atomic absorption spectrophotometer 50. Is integrally formed, and the entire upper part of the device main body 63 is covered with the cover 60. The cover 60 is provided with an openable / closable door 61, and a duct 62 is provided on the frameless atomic absorption spectrophotometer 50 side.
The gas or vapor generated in the flameless atomic absorption spectrophotometer 50 is forcibly exhausted from this duct 62. The duct 62 contains a fan for exhaust, a flow rate adjusting valve, and the like. Also in this analyzer with an autosampler, similarly to the above, the sample supply mechanism 40 takes out the sample 5 from the predetermined sample cup 1 on the turntable 37 of the autosampler 35 and places it in the cuvette 54 of the flameless atomic absorption spectrophotometer 50. Supply 5.

[0029]

【The invention's effect】

(1) In the sample cup of the present invention, since the opening is always closed by the shutter mechanism of the lid body, the sample in the sample cup due to the surrounding atmosphere and the mixing of dust while being closed by the shutter mechanism. It is possible to obtain the effect of preventing pollution of

(2) According to the above (1), in the sample cup of the present invention, since the opening is closed by the shutter mechanism of the lid, there is no contamination of the sample in the sample cup,
It is possible to provide a sample with no contamination to the sample mounting portion of the analyzer, which brings about an effect of contributing to improvement in analysis accuracy of the analyzer.

(3) In the sample cup of the present invention, since the opening is closed by the shutter mechanism of the lid, the surrounding atmosphere is not contaminated by evaporation of the sample in the closed state, and the sample cup is comfortable. The effect that the work space can be maintained is obtained. Therefore, it is possible to reduce the pollution of the surrounding atmosphere and the adverse effects on the human body due to various harmful and toxic gases generated by evaporation of the sample as in the conventional case.

(4) Due to the above (3), in the sample cup of the present invention, the evaporation mist caused by the sample does not go out of the sample cup while the opening is closed by the shutter mechanism of the lid. , Pollution of peripheral equipment by evaporation mist,
The effect of preventing the contamination of the sample in the sample cup of the other structure arranged in the periphery can be obtained.

(5) In the sample cup of the present invention, the opening is closed by the lid, but while the approach of the sampling nozzle is detected in this lid and the manufacturing sampling nozzle is detected. Since the shutter mechanism (opening / closing portion) that opens is provided, the effect that the opening / closing portion can be opened only when necessary to sample the sample can be obtained. Therefore, it is possible to obtain the effect that the contamination of the ambient atmosphere of the sample in the sample cup and dust caused by dust can be minimized, and the contamination of the ambient atmosphere caused by the sample can be minimized.

(6) Due to the above (1) to (5), according to the present invention, it is possible to prevent the contamination of the sample itself contained and to contribute to the improvement of the analysis accuracy without contaminating the surrounding atmosphere. There is a synergistic effect of being able to provide.

(7) In the autosampler of the present invention, the sample cup to be mounted has a shutter mechanism that opens and closes only when sampling the sample. Contamination due to dust or the like can be prevented, and the surrounding atmosphere is less likely to be contaminated with the stored sample. Therefore,
In the autosampler of the present invention, the samples in a large number of adjacent sample cups are supplied to the sample mounting portion of the analyzer without mutually contaminating each other, which can contribute to the improvement of analysis accuracy.

(8) In the analyzer with an autosampler of the present invention, the sample cup mounted on the turntable of the autosampler has a shutter mechanism that opens and closes only when sampling the sample. Does not open, so that contamination due to the ambient atmosphere of the sample and dust can be prevented, and the ambient atmosphere is less likely to be contaminated with the contained sample. Therefore, in the analyzer with an autosampler of the present invention, a large number of sample cups mounted on the turntable of the autosampler are supplied to the sample mounting part of the analyzer without contaminating each other's samples. Therefore, it can contribute to the improvement of analysis accuracy.

(9) From the above (1) to (8), according to the present invention, by providing a sample cup capable of preventing the contamination of the contained sample itself and the contamination of the surrounding atmosphere caused by the sample, analysis is performed. It is possible to provide an autosampler that can contribute to improvement in accuracy, and it is possible to provide a frameless atomic absorption spectrophotometer (analyzer) that can improve analysis accuracy, which is a synergistic effect.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say, for example,
As shown in FIG. 8, the opening 3 of the sample cup 1 is opened and closed even if the opening 3 is opened and closed by controlling the rotation of the end of the rotary plate 65 by the rotary shaft 66 by the drive mechanism. The same effect as the embodiment can be obtained. In the figure, the circle in the opening 3 indicates the sampling nozzle 43.

FIG. 9 is a sectional view showing a part of the lid 4 in the sample cup 1 according to another embodiment of the present invention.
In this embodiment, the portion forming the opening 3 is a thick donut body 70, a fitting hole is provided in the donut body 70 in the diameter direction, and a movable shaft 71 made of a cylindrical body is rotated in the fitting hole in a close contact state. Insert as much as possible. Further, a through hole 72 is provided in the middle portion of the movable shaft 71 along the diametrical direction. The through hole 72 is large enough to prevent the sampling nozzle 43 from being taken in and out, and is the same as or slightly smaller than the opening 3. In addition, the drive shaft 2 of the drive motor 20
1, a rotary shaft 74 at one end of the movable shaft 71 is connected to the rotary shaft 74 via a coupling 73. The movable shaft 71 is rotated by the rotation of the drive motor 20, and the drive motor 20 is stopped with the through hole 72 provided in the movable shaft 71 extending in the vertical direction.
In this state, the through hole 72 and the opening 7 of the opening 3 are aligned with each other, and the tip of the sampling nozzle 43 can be inserted into the sample cup 1. When the sampling nozzle 43 comes out of the sample cup 1, the drive motor 20 rotates in the reverse direction so that the through hole 72 faces sideways, and the opening 3 (opening 7) is closed. The movable shaft 71 may be a sphere. The structure of the opening / closing part of the lid 4 in the sample cup 1 according to the present invention is not limited to the above-mentioned embodiment. For example, a structure may be used in which the opening 3 is opened and closed by a door that is in the double door structure. Further, in the sample cup 1 of the present invention, since various chemicals and the like are stored, there may be parts for which the description of the material is not added, but each part is formed of a material having excellent chemical resistance. ing. That is, each component is formed of a plastic such as ethylene tetrafluoride having excellent chemical resistance, a ceramic, or a metal whose surface is coated with plastic such as ethylene tetrafluoride having excellent chemical resistance.

In the above description, the invention made by the present inventor was mainly applied to the sample supply technique for the flameless atomic absorption spectrophotometer, which is the field of application which was the background of the invention, but the invention is not limited thereto. is not. The present invention can be similarly applied to other analyzers that use a sample cup to supply a sample, and can achieve similar effects.

[Brief description of drawings]

FIG. 1 is a perspective view of a sample cup according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view showing the inside of a lid of a sample cup according to an embodiment of the present invention.

FIG. 3 is a schematic view showing a shutter mechanism in a sample cup according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a sample cup according to an exemplary embodiment of the present invention.

FIG. 5 is a circuit diagram for controlling the opening / closing of the opening / closing part in the sample cup according to the embodiment of the present invention.

FIG. 6 is a schematic diagram showing an outline of an autosampler according to an embodiment of the present invention.

FIG. 7 is a schematic diagram showing an outline of an analyzer with an autosampler according to an embodiment of the present invention.

FIG. 8 is a schematic plan view showing an outline of an opening / closing part in a sample cup according to another embodiment of the present invention.

FIG. 9 is a partial cross-sectional view showing an outline of an opening / closing part in a sample cup according to another embodiment of the present invention.

[Explanation of symbols]

1 ... Sample cup, 2 ... cup body, 3 ... opening, 4
... Lid, 5 ... Sample, 6 ... Tsuba, 7 ... Opening, 9 ... Bottom plate, 10
... Opening / closing unit, 11 ... Drive mechanism, 12 ... Shutter mechanism, 1
3 ... Shutter claw, 14 ... Shutter, 15 ... Spindle, 1
6 ... Wire, 17 ... Pin, 19 ... Coil spring, 20 ... Drive motor, 21 ... Drive shaft, 22 ... Pulley, 23 ... Through hole,
24 ... Inner wall, 25 ... Battery, 26 ... Housing, 27 ... Light emitting device, 28 ... Light receiving device, 29 ... Light (light flux), 30 ... Switch, 31 ... Relay, 35 ... Autosampler, 36 ...
Device body, 37 ... Turntable, 38 ... Rotating shaft, 39
... Mounting hole, 40 ... Sample supply mechanism, 41 ... Drive shaft, 42 ...
Arm, 43 ... sampling nozzle, 44 ... tube,
50 ... Flameless atomic absorption spectrophotometer, 51 ... Device body,
52 ... Atomizer, 53 ... Lid, 54 ... Sample mounting part (cuvette), 60 ... Cover, 61 ... Door, 62 ... Duct, 6
3 ... Device body, 65 ... Rotating plate, 66 ... Rotating shaft, 70 ... Donut body, 71 ... Movable shaft, 72 ... Through hole, 73 ... Coupling, 74 ... Rotating shaft.

Claims (3)

[Claims] 1. A cup body having an open upper portion for containing a sample, a lid body detachably attached to the cup body so as to close the opening of the cup body, and an opening / closing control provided on the lid body. An opening / closing part, a sensor provided in the lid for detecting a sampling nozzle approaching the opening / closing part from the outside, and a drive provided in the lid for controlling the opening / closing of the opening / closing part based on detection information of the sensor. A sample cup having a mechanism. 2. A device body, a turntable provided on the device body and having a plurality of sample cups mounted thereon, the rotation of which is controlled, and a tip of a sampling nozzle inserted into the sample cup of the turntable. An autosampler having a sample supply mechanism for sucking in the sample and supplying the sample to the sample mounting part of the analyzer, wherein the sample cup has a cup body with an open upper part for accommodating the sample, and an opening of the cup body. A lid body detachably attached to the cup body so as to block the part,
The lid includes an opening / closing unit that is controlled to open and close, a sensor that detects a sampling nozzle approaching the opening and closing unit from the outside, and a drive mechanism that controls the opening and closing of the opening and closing unit based on detection information from the sensor. An auto sampler that is characterized by 3. An analyzer and a sampling nozzle is inserted into a predetermined sample cup of a plurality of sample cups formed integrally with the analyzer and mounted on a turntable to suck a sample in the sample cup. After that, an autosampler for supplying a sample to the sample mounting portion of the analyzer, and an analyzer with an autosampler having a cover for covering the autosampler and the analyzer, the sample cup mounted on the turntable, A cup body with an open upper part for containing a sample, a lid body detachably attached to the cup body so as to close the opening portion of the cup body, and an opening / closing section provided on the lid body and controlled to open and close, A sensor for detecting a sampling nozzle approaching the opening / closing section from the outside, and opening / closing of the opening / closing section based on detection information from the sensor. An analyzer with an autosampler, characterized by comprising a drive mechanism for controlling.