JPH028659B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to an automatic sample supply device for moisture measurement, and its purpose is to provide a sample supply device that can continuously and automatically supply a fixed amount of samples contained in a plurality of containers to a moisture meter. The goal is to provide equipment.

Hereinafter, the present invention will be explained in detail with reference to the drawings showing embodiments.

FIG. 1 shows a schematic configuration of an automatic sample supply device for moisture measurement. A solvent injector 2 is provided above so as to be movable up and down, and a container A is inserted through the solvent injector 2 in order to dissolve the sample and create a sample liquid.
a solvent supply device 3 for supplying a predetermined amount of solvent into the interior;
A container vibrating device 4 that vibrates the container A containing a solvent to promote dissolution of the sample; and a sample liquid inhaler 5 that is vertically movable and provided above the movement path of the container A after being vibrated. , a sample liquid supply device 7 that supplies a predetermined amount of the sample liquid in the container A to the moisture meter 6 via the inhaler 5
It is equipped with

As shown in FIGS. 2 to 4, the container moving device 1 includes a pair of upper and lower rotating disks 9 and 10 provided at the top of a first housing 8.
10 are integrally connected and driven intermittently in the counterclockwise direction in FIG. The upper rotating disk 9 is provided with circular container insertion holes 11 that are slightly larger than the outer diameter of the container A at regular intervals on one circumference of the outer periphery, and the lower rotating disk 10 is provided with circular container insertion holes 11 that are slightly larger than the outer diameter of the container A. A circular hole 12 smaller than the outer diameter of the container A is provided directly below the container insertion hole 11. The mutual distance between the upper and lower rotary disks 9, 10 is smaller than the height of the container A. The container A is inserted from above into the insertion hole 11 and is held by the upper and lower rotating disks 9 and 10. In addition, in container A,
A rubber stopper a is provided (see Figure 4).

A second casing 13 is placed on the side of the first casing 8, and its upper portion is fixed to the first casing 8 in a variable mounting position. As shown in FIGS. 2 to 5, the solvent injector 2 includes a vertical moving rod 14 attached to the upper surface of the second housing 13 so as to be movable up and down, and a horizontal moving rod 14 fixed to the upper end of the moving rod 14. It consists of an arm 15, a needle holder 16 fixed to the tip of the arm 15, and a solvent injection needle 17 and an air purge needle 18 fixed perpendicularly to the lower end of the holder 16, respectively. There is. The injection needle 17 for injecting the solvent is located above the moving path of the container A, that is, directly above the holes 11 and 12 of the rotating disks 9 and 10 of the container moving device 1.
Further, both ends of the air venting injection needle 18 are open, and the lower end thereof is located above the lower end of the solvent injection injection needle 17.

As shown in FIGS. 2 to 5, the solvent supply device 3 includes a solvent container (solvent reservoir) 19 in which the solvent is stored.
and a syringe barrel 20 that sucks a predetermined amount of solvent from the solvent container 19 and sends it to the solvent injector 2. The solvent container 19 is placed on the side of the second housing 13, and the syringe barrel 20 is placed on the side of the second housing 13, as shown in detail in FIG.
is fixed on the top surface. That is, a short cylindrical flanged lower support member 21 having a through hole in the center of the bottom is fitted into a through hole drilled in the upper surface of the second housing 13, and a thinner male screw is inserted at both ends of the shaft portion. The flange of the lower support member 21 is connected to the second housing 1 by the screws on the lower side of the several vertical support rods 22 formed.
The flanges of a cylindrical flanged upper support member 23 are fixed to the upper ends of these support rods 22 by nuts 24. The upper and lower ends of the syringe barrel 20 are fitted with gaskets 25 and 2 fitted to the upper and lower support members 23 and 21.
6 and is fixed to the support members 21 and 23 by a lid 27 screwed in from above the upper support member 23 so as to press the gasket 25 on the upper part. A tip member 29 having a solvent inlet/outlet hole 28 is attached to the upper part of the syringe barrel 20 . Syringe barrel 2
0, the piston 30 is fitted from below,
A piston rod 31 is fitted in a guide bush 32 fixed to the second housing 13 in a sealed manner so as to be vertically movable. Further, a tube 33 is hermetically fixed between the bottom of the lower support member 21 and the flange of the guide bush 32, and silica gel (desiccant) is contained in a sealed chamber 34 surrounded by these tubes. Inside the second housing 13 is a cam 35 driven by an electric motor.
is provided at the lower end of the piston rod 31,
Cam follower 36 that contacts this cam 35 from above
is installed. Also, piston rod 31
is always biased downward by a coil spring 37 provided between the second housing 13 and the second housing 13 . A rectangular hole 38 is provided in the front of the second housing 13, and a nut 39 fixed in the second housing 13 at the upper part of the hole 38 is connected to a stopper 40 and a knob 4 on the top and bottom.
A vertical adjustment screw 42 with a screw 1 attached thereto is screwed. In addition, on the front of the second housing 13,
A vertically elongated hole 43 is provided above the hole 38, and a portion of the stopper 40 is fitted into this elongated hole 43.
The lower end of the piston 30 is regulated by a stopper 40, and by turning an adjustment screw 42 and changing the position of the stopper 40, the amount of solvent inhaled can be set to an arbitrary value (0.5 to 5 ml in this case). There is. Note that a scale indicating the amount of solvent sucked into the syringe barrel 20 is provided on the side of the elongated hole 43. Two electromagnetic switching valves 44, 4 are provided on the upper surface of the second housing 13.
5 is fixed, and the solvent container 19 is connected to the pipe 46,
The injection needle 17 for solvent injection is connected to the tip member 29 of the syringe barrel 20 via the valve 44 for solvent suction and pipes 47 and 48, and the injection needle 17 for solvent injection is connected to the injection needle holder 16, the pipe 49, the valve 45 for solvent discharge, and the pipe. It is connected to the tip member 29 via 50 and 48.

A gutter-shaped drain receiver 5 is provided on the upper surface of the second housing 13.
1 is mounted for rotation about a substantially vertical axis. This drain receiver 51
is an advanced position where the rotating end advances between the container A on the moving device 1 and the solvent injection needle 17 at the upper end position (the position shown by the solid line in FIG. 3), and the second
It is selectively switched to a retracted position (position shown by a solid line in FIG. 4) where it retracts to the case 13 side, and is connected to a drain bottle 53 by a drain pipe 52.

The container vibrating device 4 is connected to the hole 1 adjacent to the front of the solvent injection injection needle 17 when viewed from the rotational direction of the rotating disks 9 and 10.
1 and 12, a vibrator 54 is provided below the lower rotary disk 10 to vibrate the container A from the hole 12, and a vibrator 54 is provided so as to vibrate the container A from the hole 12, and a vibrator 54 is provided so as to extend horizontally slightly above the container A. and a container holding plate 55 fixed to the upper surface of the first housing 8 (see FIG. 6).

As shown in FIGS. 2 and 3, the sample liquid inhaler 5 is a vertically movable rod attached to the first housing 8 so as to be able to move up and down along the central axis of rotation of the rotating disks 9 and 10. 56, a guide 57 fixed to the upper end of the vertically movable rod 56, a horizontally movable arm 58 attached to the guide 57 so as to be movable in the radial direction of the rotating disks 9 and 10, and a It consists of a fixed injection needle holder 59, and a sample liquid suction injection needle 60 and an air suction injection needle 61 fixed vertically to the lower end of the holder 59, respectively. As in the case of the solvent injector 2, both ends of the air suction injection needle 61 are open, and its lower end is located above the lower end of the sample liquid suction injection needle 60. When the arm 58 is retracted, the sample liquid suction injection needle 60 is located directly above the holes 11 and 12 adjacent to the front of the vibration device 4 when viewed from the rotational direction of the rotating disks 9 and 10. There is. The first one on the outside from the rotating disks 9 and 10
A cleaning solvent reservoir 62 is provided on the upper surface of the casing 8 on an extension of the arm 58, and above the first casing 8,
A solvent container 63 is arranged to supply a suitable solvent to the solvent reservoir 62. When the arm 58 is advanced, the sample liquid suction injection needle 60 is positioned directly above the solvent reservoir 62.

The sample liquid supply device 7 includes a rotary valve 64 as shown in FIG. 1, and the sample liquid inhaler 5, vacuum pump 65, high pressure nitrogen gas cylinder 66, and moisture meter 6 are connected to this rotary valve 64. rotary valve 64
As shown in FIGS. 7 to 11, the third housing 6 is installed separately from the first and second housings 8 and 13.
A fixed main body 68 fixed in 7 and a fixed main body 68
The rotating body 69 is rotatably attached to the upper surface of the fixed body 68, and the rotating body 69 is pressed against the upper surface of the fixed body 68 by a spring 70. A collar-shaped plate 72 in which six radial grooves 71 are formed at equal intervals is fixed to the outer periphery of the rotating body 69, and a driving disk 74 is provided with a rotating pin 73 that fits into these grooves 71. By reciprocating the rotating body 69, the rotating body 69 intermittently rotates reciprocally through a certain angle (60° in this case). The rotating body 69 is provided with six sets of sample liquid holding sections 75 as follows.
That is, the rotating body 69 has six upper and lower through holes 76 provided at equal intervals on one circumference centered on the rotational axis, and six upper and lower through holes 76 provided at equal intervals on another circumference concentric with this. Six upper and lower through holes 77 provided
are arranged alternately, and a coiled sample liquid holding tube 7 is placed at the upper end of each pair of adjacent holes 76, 77.
Both ends of 8 are connected, and these constitute a sample liquid holding section 75 that always holds a fixed amount of sample liquid. The length and thickness of each holding tube 78 are determined so that each holding section 75 can hold a different amount of sample liquid. On the other hand, the fixed body 6
8, a rotating body 6 stopped at one end of reciprocating rotation.
A pair of upper and lower through holes (ports) 79, 80 are provided which communicate with one set of holes 76, 77 of 9, and when the rotating body 69 stops at the other end of reciprocating rotation, A pair of upper and lower through holes (ports) 81 and 82 communicating with the holes 76 and 77 are provided. One set of ports 79 and 80 are for sucking the sample liquid from the container A into the holding part 75, and one port 79 is for the pipe 83 and the third housing 67.
It is connected to the sample liquid inhaler 5 through the front connection port 84 and the tube 85, and the other port 80 is connected to the tube 8.
6. Connection port 87 and pipe 88 on the front of the third housing 67
It is connected to a vacuum pump 65 via. In addition, the other pair of ports 81 and 82 are connected to the holding portion 75.
One port 81 is for supplying sample liquid to the moisture meter 6 from the pipe 89 and the third housing 67.
Moisture meter 6 via front connection port 90 and pipe 91
The other port 82 is connected to the tube 92, the third
It is connected to the nitrogen gas cylinder 66 via a pipe 95 provided with a connection port 93 and a valve 94 on the front surface of the housing 67 . At the time of measurement, only one arbitrary set of holding parts 75 is selected and used, and this selected holding part 7
5 are alternately communicated with ports 79 and 80 for sample liquid intake and ports 81 and 82 for sample liquid supply. Further, each holding portion 7 is provided on the outer periphery of the brim plate 72.
A display plate 96 indicating the amount of sample liquid that can be held in the groove 71 is attached to the groove 71 into which the pin 73 of the drive disk 74 is fitted.
By changing the position of the holding part 75, any holding part 75 can be selected and used. and,
The amount of sample liquid held in the selected holding section 75 (in this case
(6 types of 0.5 to 5 ml) can be viewed through an opening 97 provided in the front of the third housing 67.

In the above, the container A containing the sample is manually inserted into the hole 11 of the rotating disk 9 of the container moving device 1, and the rotating disks 9 and 10 are inserted into the hole 11, It rotates intermittently by one pitch of 12 at regular intervals. And the rotating disk 9,1
0 is stopped, the solvent supply device 3 and the solvent injector 2 inject the solvent into the container A, the vibration device 4 vibrates the container A, and the sample liquid inhaler 5 and the sample liquid supply device 7 to supply the sample liquid to the moisture meter 6, and the moisture content measurement by the moisture meter 6 are automatically performed, and after these processes are completed, the rotating disks 9 and 10 are further It rotates by a pitch, and the same operation is repeated.
Further, a preset dial 101 and a display 102 are provided on the front of the first housing 8. The number of containers A for which measurement has been completed is displayed on the display 102, and the number of containers set on the dial 101 is displayed. When the measurement for A is completed, the device automatically stops.

When the rotary disks 9 and 10 rotate, the solvent injector 2 is in the upper end position, the drain receiver 51 is in the advanced position, and the two switching valves 4 of the solvent supply device 3 are in the upper end position.
4,45 are closed. And the rotating disk 9,1
0, the solvent suction valve 44 of the solvent supply device 3 opens, the piston 30 moves downward until the rod 31 hits the stopper 40, and a certain amount of solvent is sucked into the syringe barrel 20. Next, the solvent injection valve 44 is closed and the solvent discharge valve 45 is opened, and the piston 30 moves upward by a certain amount and once stops.
A small amount of solvent is discharged from the tip of the injection needle 17 for injection of solvent. The discharged solvent is discharged from the drain receiver 51 through the drain pipe 52 into the drain bottle 53. This operation is for discarding a certain amount of the solvent that has absorbed water from the tip of the injection needle 17 during standby. Once the solvent at the tip of the injection needle 17 is discharged, the drain receiver 51 moves to the retracted position and the solvent injector 2 moves down to the lower end position. As a result, most of the solvent injection needle 17 and the lower end of the air venting needle 18 break through the rubber stopper a and enter the container A (see FIG. 4). Next, the piston 30 moves upward to the upper end position, and the injection needle 17
Inject a certain amount of solvent into container A. At this time, the excess air in the container A is removed by the air venting needle 1.
It is discharged through 8. When the injection of the solvent is finished, the solvent discharge valve 45 is closed and the solvent injector 2 is closed.
moves upward to the upper end position, and the drain receiver 51 moves to the advanced position.

Furthermore, when a certain period of time has elapsed after the rotating disks 9 and 10 stopped, the vibrator 54 of the container vibrating device 4 starts operating, and until the rotating disks 9 and 10 rotate next time, Vibrate container A to promote dissolution of the sample. Note that the time until the vibrator 54 starts operating is set using a preset dial.

On the other hand, when the rotating disks 9 and 10 rotate,
The sample liquid inhaler 5 is at the upper end position and the retracted position,
Selected sample liquid holding section 75 of sample liquid supply device 7
is in communication with ports 79 and 80 for sucking sample liquid, the vacuum pump 65 is stopped, and the valve 94 of the nitrogen gas cylinder 66 is closed. Then, when the rotating disks 9 and 10 stop, the sample liquid inhaler 5 first moves down to the lower end position, and the sample liquid inhalation needle 60 breaks through the rubber stopper a and reaches the bottom of the container A. The inhalation injection needle 61 breaks through the rubber stopper a and enters into the container A a little. Next, the vacuum pump 65 is operated for a certain period of time, and the injection needle 60 and the tubes 85, 83 are removed from the container A.
A certain amount of sample liquid is sucked into the holding part 75 through the port 79. At this time, as the sample liquid is inhaled, air is inhaled into the container A from the air inhalation injection needle 61. When the vacuum pump 65 stops, the drive disc 74 causes the rotary body 6 of the rotary valve 64 to rotate.
9 is rotated, and the holding part 7 holds the sample liquid.
5 communicates with ports 81 and 82 for supplying sample liquid,
At the same time, the sample liquid inhaler 5 moves upward to the upper end position and then moves to the advanced position. Note that the suction time of the sample liquid, that is, the operation time of the vacuum pump 65 is set by the preset dial 104. When the holding part 75 that has sucked the sample liquid communicates with the sample liquid supply ports 81 and 82, the valve 94 of the nitrogen gas cylinder 66 is opened for a certain period of time, and the holding part 7
The sample liquid sucked into port 81 and tube 8
9 and 91 to the moisture meter 6. When the supply of the sample liquid is finished, the rotating body 6 of the rotary valve 64
9 rotates, the holding part 75 communicates with the ports 79 and 80 for inhaling the sample liquid, the sample inhaler 5 moves down to the lower end position, and the injection needle 60 for inhaling the sample liquid enters the solvent reservoir 62. Enter the solvent. Next, the vacuum pump 65 operates to inhale the solvent, and after a certain period of time, the sample liquid inhaler 5 moves up to the upper end position and moves to the retracting position, and the vacuum pump 65 operates to perform the injection. Needle 60, tubes 85, 83, ports 79, 80 for sample liquid suction, and sample liquid holding section 75
are cleaned and all the solvent inside them is sucked out. Note that the operating time of the vacuum pump 65 at this time is also set on the preset dial 105.
Note that when supplying the sample liquid to the moisture meter 6 using nitrogen gas, excess nitrogen gas is discarded through a drain.

After a certain period of time has elapsed after cleaning of the sample liquid inhaler 5 and sample liquid supply device 7 has been completed, the rotating disks 9 and 10 rotate by one pitch of the holes 11 and 12, and the above-described operation is repeated. This time is set on the preset dial 106 in consideration of the time required for measurement with the moisture meter 6, the time required for dissolving the sample, etc.
If the time required for dissolution differs depending on the sample to be measured, this can be dealt with by changing this time, but changing the mounting position of the second housing 13 on the first housing 8 may also reduce the amount of time required for dissolving the solvent. This can also be addressed by changing the distance from the syringe 2 to the vibration device 4.

According to the above embodiment, the solvent injector 2 includes the vertical solvent injection needle 17 connected to the solvent supply device 3 and the vertical air venting needle 18 with both ends open, and the sample liquid Since the inhaler 5 includes a vertical sample liquid suction needle 60 connected to the sample liquid supply device 7 and a vertical air suction needle 61 with both ends open, a rubber stopper can be used. Even in the case of using a container with a closed structure, injection of the solvent and suction of the sample solution can be carried out smoothly. By using a container with a rubber stopper, the sample solution absorbs almost no water during the waiting period between injecting the solvent into the sample in the container to dissolve it and supplying it to the moisture analyzer. has been confirmed by experiment. However, if a container without a stopper is used, the air venting needle 18 and the air suction needle 61 are unnecessary, and the solvent syringe 2 and the sample liquid inhaler are configured with needles. There's no need to.

Further, according to the above embodiment, the solvent drain receiver 51 is movably provided between the container moving device 1 and the solvent injector 2, and the solvent supply device 3 is connected to at least a part of the solvent injector 2. Solvent drain receiver 51
Since the solvent is supplied into the container A after being discharged, the influence of moisture absorption of the solvent from the tip of the solvent injector 2 is almost eliminated. in this case,
Part of the solvent in the solvent injector 2 and the solvent supply device 3 may be discharged to the drain receiver 51, or only the solvent at the tip of the solvent injector 2 may be discharged. According to experiments, in the above example, it was confirmed that by discharging 0.5 ml of solvent from the tip of the injection needle 17 for solvent injection into the drain receiver 51, the influence of moisture absorption of the solvent from the tip of the injection needle 17 was almost eliminated. It is being

Further, according to the above embodiment, the solvent supply device 3
However, there is a solvent reservoir 19 that stores the solvent, and a solvent injector 2 that sucks a predetermined amount of solvent from the solvent reservoir 19.
Since at least the piston inlet portion of the syringe barrel 20 is placed in the sealed chamber 34 containing the desiccant, the solvent absorbs water from the solvent supply device 3. There is no risk of it happening.

Further, according to the above embodiment, the sample liquid supply device 7
However, the sample liquid holding section 75 holds a certain amount of sample liquid.
The valve 64 is connected to the sample liquid inhaler 5, the vacuum pump 65, and the high pressure nitrogen gas cylinder 66.
The sample liquid is sucked into the holding part 75 from the inhaler 5 by the vacuum pump 65, and the holding part 75 is injected with nitrogen gas from the cylinder 66.
5 to the moisture meter 6, the moisture content can be measured in a nitrogen gas atmosphere in the moisture meter. It has been confirmed through experiments that there is no difference between the measured values in a nitrogen gas atmosphere and the measured values in a normal air atmosphere.

Further, according to the above embodiment, the valve 64 includes the fixed body 68 and the rotating body 69 attached to the fixed body 68 so as to be able to reciprocate by a predetermined angle, and the fixed body 68 is provided with a sample liquid. Ports 79 and 80 for sample liquid suction connected to the inhaler 5 and vacuum pump 65, respectively, and ports 81 and 82 for sample liquid supply connected to the high pressure nitrogen gas cylinder 66 and the moisture meter 6, respectively, are provided, and the rotary main body 69 is provided with a sample liquid holding part 75 consisting of two through holes 76 and 77 and a sample liquid holding tube 78 whose both ends are connected to these through holes 76 and 77, and the holding part 75 is connected to the rotating body. By reciprocating the rotation of 69, the ports 79 and 80 for sucking the sample liquid and the ports 81 and 82 for supplying the sample liquid are alternately connected to each other. can be supplied, and there is little risk that the sample liquid will absorb moisture. These have also been confirmed through experiments. In addition, the rotating body 6 of the valve 64
9 is provided with a plurality of sample liquid holding sections 75 each holding a different amount of sample liquid, so the amount of sample liquid supplied to the moisture meter 6 can be changed by switching the holding sections 75 as necessary. be able to.

As described above, the sample supply device according to the present invention includes a container moving device 1 that holds and moves a container A containing a sample, and a solvent injector 2 that is vertically movable and provided above the movement path of the container A. , a solvent supply device 3 for supplying a predetermined amount of solvent into a container A via a solvent injector 2 to dissolve a sample to create a sample solution, and a container to which a solvent is added to promote dissolution of the sample. A container vibrating device 4 that vibrates the container A, a sample liquid inhaler 5 that is vertically movably provided above the movement path of the container A after the vibration, and a sample liquid in the container A via the inhaler 5. Since it is equipped with a sample liquid supply device 7 that supplies a predetermined amount to the moisture meter 6, the container A containing the sample
By simply supplying the liquid to the moving device 1, the injection of the solvent into the container A, the dissolution of the sample, and the supply of the sample solution containing the sample to the moisture meter 6 can all be performed automatically and continuously. Further, a solvent drain receiver 51 is movably provided between the container moving device 1 and the solvent injector 2, and the solvent supply device 3 discharges at least a portion of the solvent in the solvent injector 2 to the drain receiver 51. After that, the solvent is supplied into the container A, so that the solvent that has absorbed moisture from the tip of the solvent injector 2 during standby is discarded into the drain receiver 51, and the solvent that has absorbed moisture is is not supplied into the container A, and the influence of moisture absorption of the solvent from the tip of the solvent injector 2 can be almost eliminated.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall schematic diagram, FIG. 2 is a front view, FIG. 3 is a partially omitted plan view, and FIG. 4 is a partially cutaway view of the second casing. The front view, Fig. 5 is a partially cutaway side view of the second casing, and Fig. 6 is a partially cutaway side view of the second casing.
The figure is an enlarged sectional view of the line shown in Fig. 3, and Fig. 7 is an enlarged cross-sectional view of the line shown in Fig.
Figure 8 is an enlarged cross-sectional view taken along the lines shown in Figure 7. Figure 9 is a partially cutaway front view of Figure 7. Figure 9 is a cross-sectional view taken along Figure 7. −
FIG. 3 is a cross-sectional view taken along line and XI-XI. 1... Container moving device, 2... Solvent injector, 3...
... Solvent supply device, 4 ... Container vibration device, 5 ... Sample liquid inhaler, 6 ... Moisture meter, 7 ... Sample liquid supply device, 19 ... Solvent container (solvent reservoir), 20 ... Syringe barrel , 30... Piston, 34... Sealed chamber, 51
...Drain receptacle, A...container.

Claims (1)

[Claims] 1. A container moving device 1 that holds and moves a container A containing a sample, a solvent injector 2 that is vertically movable provided above a moving path of the container A, and a solvent injector 2 that is capable of dissolving a sample. A solvent supply device 3 that supplies a predetermined amount of solvent into a container A via a solvent injector 2 to prepare a sample solution, and a container that vibrates the container A into which the solvent has been added to promote dissolution of the sample. A vibration excitation device 4, a sample liquid inhaler 5 provided vertically movably above the movement path of the container A after vibration, and a predetermined amount of the sample liquid in the container A into the moisture meter 6 via the inhaler 5. A drain receiver 51 for the solvent is movably provided between the container moving device 1 and the solvent injector 2, and the solvent supply device 3 is provided with a sample liquid supply device 7 that supplies at least the solvent injector 2. The automatic sample supply device for moisture measurement is configured to supply the solvent into the container A after discharging a portion of the solvent therein to a drain receiver 51. 2. The solvent supply device 3 includes a solvent reservoir 19 for storing a solvent, and a syringe barrel 20 that sucks a predetermined amount of solvent from the solvent reservoir 19 and sends it to the solvent injector 2,
The automatic sample supply device for moisture measurement according to claim 1, wherein at least a portion of the piston inlet of the syringe barrel 20 is disposed within a sealed chamber 34 containing a desiccant.