JPH0452676Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to the structure of a sample cell suitable for analysis using light.

(Prior art) An analysis device that fills a sample into a cell that forms a sample storage container, irradiates analytical light from the optical path forming surface, detects the light that passes through the sample, or the light that is reflected, and measures components, etc. In some cases, the sample may overflow when filling the cell with the sample.

In such cases, the sample adhering to the optical path forming surface is wiped off with a cloth or wiping paper for precision equipment, but since the cell itself is extremely small, this work is not only extremely difficult, but also removes the blood. In the case of highly viscous materials, such as those with high viscosity, there was a problem that it could not be completely wiped out and the measurement results contained errors.

(Purpose) The present invention was made in view of the above problems, and its purpose is to provide a novel optical cell for analysis that can prevent contamination of the optical path forming surface as much as possible. There is a particular thing.

(Summary of the invention) In other words, the present invention is characterized by forming an overflow port on a surface other than the optical path forming surface to match the upper limit level of the sample, and communicating with the overflow port to provide a downward flow. This is the point where an extending groove is formed.

(Example) Therefore, the details of the present invention will be explained below based on the illustrated example.

FIG. 1 shows an embodiment of the present invention, and reference numeral 1 in the figure is an analytical optical cell, which is a feature of the present invention. , 1b, in this embodiment at least one of the side surfaces 1c and 1d.
The overflow port 2 is cut out to correspond to the sample injection upper limit level LL, and a groove 3 is formed at the bottom so as to communicate with the overflow port 2. A plug 4 seals the cell opening 5 and is made of a polymeric material to match the shape of the opening 5 of the cell 1.

In this embodiment, when the sample is injected through the opening 5, the sample fills the cell 1 and overflows from the overflow port 2 to the outside of the cell 1 when it reaches the upper limit level LL. This overflowing sample flows downward while the flow path is regulated by the groove 3 communicating with the overflow port 2. Needless to say, since the overflow port 2 and the groove 3 are formed on the surface 1c other than the optical path forming surfaces 1a and 1b, the flow does not flow into the optical path forming surfaces 1a and 1b.

FIG. 2 shows a second embodiment of the present invention, in which the upper limit level L- of the surface 1c other than the optical path forming surface is shown.
According to this embodiment, the overflow port 6 is formed by drilling a through hole that communicates with the inside of the cell 1 in accordance with L. According to this embodiment, the defective part of the cell is made as small as possible and the cell is The mechanical strength can be greatly increased, and the overflow flow rate per unit time can be limited to effectively prevent contamination of the optical path forming surface.

In the above embodiments, a cell with a rectangular cross section was used as an example, but even in a non-rectangular cell, for example, a cell with a circular cross section, the wall surface substantially perpendicular to the optical path forming surface may be In addition to providing an overflow port,
It is clear that a similar effect can be achieved by forming a downwardly extending groove in communication with the groove.

(Effects) As explained above, according to the present invention, an overflow port is formed on a surface other than the optical path forming surface to match the upper limit level of the sample, and the overflow port is communicated with and extends downward. The grooves not only allow the sample to be injected at a specified level;
The sample overflowing from the cell can overflow from a surface other than the optical path forming surface, and the flow direction can be regulated by the groove to prevent contamination of the optical path forming surface.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an apparatus showing one embodiment of the present invention, and FIG. 2 is a perspective view showing another embodiment of the present invention. 1... Optical cell for analysis, 1a, 1b... Optical path forming surface, 1C, 1d... Non-optical path forming surface, 2, 6...
Overflow port, 3... ditch.

Claims (1)

[Scope of utility model registration request] For analysis, an overflow port is formed on a surface other than the optical path forming surface of a container made of an optically transparent material to match the upper limit level of the sample, and a groove is formed that communicates with the overflow port and extends downward. optical cell.