JPS5837554A - Measuring cell - Google Patents

Abstract

PURPOSE:To completely discharge a liquid to be tested by drilling a discharging hole on a position close to the part in which the bottom and side of a container are intersected. CONSTITUTION:A measuring cell A is provided with a container 1 of which upper part is opened, an agitator 6 pivotally fitted to the bottom of the container 1 and a discharging hole for discharging liquids to be tested. The discharging hole 10 is arranged on a position close to a part in which the bottom and side of the container are intersected, so that the liquid to be tested can be easily discharged without leaving the liquid even if discharge is carried out during agitation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring cell for analyzing liquid components using electrodes, and in particular improves the mounting position of the drain hole in the bottom 11* of the container where the liquid to be tested is placed. .

The conventionally known Marubuchi constant cell is a cell container in which a liquid to be tested containing analytical components is placed, a magnet or a metal that can be moved by a magnet is built in, and nine stirrers are placed inside the cell container. Then, the stirrer is rotated (by the magnetic force of a magnetic stirrer installed outside the container) to keep the liquid to be tested in an agitated state.

In this state, an electrode is inserted into the liquid to extract a good electrical signal corresponding to the component a degree in the liquid, and from this signal, the component a
We are conducting an analysis of Once the analysis is completed, the test liquid is drained from the drainage hole in the bottom wall of the stirred cell, the liquid is replaced, and the fresh test liquid is inserted into the cell container for analysis. was being carried out. However, this I
f), When water is drained while stirring wAl, the part where the water surface rises due to the centrifugal force cannot be completely removed, and when the next test liquid is added and analyzed, the remaining test liquid from the previous analysis will affect the next analysis.9 .

This kind of measurement cell is always affected by the previous sample, which has the disadvantage of reducing analysis accuracy and causing electromotive force.
−) Friend. It is possible to minimize the influence of the fIiFjA sample by temporarily stopping stirring when draining the liquid in order to correct this problem, but stopping it every time the liquid is replaced is not recommended due to signal processing, a-position durability, etc. Although not optimal, a defined cell that allows continuous analysis without stopping stirring is desired.

This book aims to solve the above-mentioned problems. By selecting the position of the nine drainage holes provided in the container containing the test liquid, the present study aims to solve the above-mentioned problems. It has been improved so that it can be completely drained, and even in continuous analysis, it can be analyzed at a high level without being affected by the sample liquid from the previous analysis.

According to the present invention, without temporarily stopping the stirring device,
It is possible to drain the liquid almost completely and obtain accurate analysis values as described above! ! By placing the drain hole for the test liquid near the intersection of the bottom of the container and the positive side with a closed lid, it is possible to drain the test liquid that has been forced onto the Sa side by the centrifugal force of the stirrer. It is said that it becomes.

Hereinafter, the present invention will be described in detail by examples with reference to the drawings.
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Example 1 The defined cell in the analyzer shown in FIG. 1 shows an example of the present invention. This demarcation cell (A) has an open upper part and is equipped with a Kutani vessel +1), a stirrer (6) provided at a rotating position at the bottom of this container tl), and a drainage hole α for draining the test liquid. ing.

The drainage hole α is connected to the bottom of the container and #1 as shown in Figure 1.
Since it is placed near the area where it intersects with the first surface, it can be easily drained without leaving any liquid to be tested, even if it is drained during stirring.

ratio@? 11 In the case of Figure 2, which shows a defined cell with a conventional structure, the drain hole of the measurement cell is not provided near the intersection of the bottom of the container and the measurement surface, but is placed on the bottom wall of the container. If the water is drained while stirring, the part where the water surface rises due to centrifugal force will remain at the edges of the container.

Experiments were conducted using the above cell of conventional structure and the measuring cell of the present invention, and the results are shown in Table 1.

Rotation speed @OOrpm The above results are obtained by using ion-exchanged water as the test liquid in the analyzer, adding 1 mj of the test liquid to each measurement cell from the buffer container aυ using the liquid supply bonder (9), and applying 1 g. The magnetic force of the chitta stirrer (5) rotates the stirrer (6) placed in the container (1) to keep it in an agitated layer.

During stirring, drain hole α1. Drain the test liquid from αl, and add a large amount of 1Ill to 91mJ from the liquid supply pump (9).
The difference between the amount of the test liquid and the amount of the test liquid was expressed as the amount of remaining liquid.

According to the eleventh result, according to the measurement cell according to the present invention, the test liquid can be drained to a wet level without leaving any droplets in the defined cell. As a result, it is necessary to improve the degree of zero analysis tank that can perform analysis without being affected by the liquid in the previous analysis.

3allA and 1li4 show other embodiments of the measuring cell according to the present invention. The demarcation cell shown in FIG. 3 has a drainage hole directly below the bottom of the container near the area where the measured surfaces intersect. In the defining cell shown in FIG. 4, the center of the bottom of the container is curved and protrudes higher than the surrounding area, and a drainage hole is provided at the peripheral edge. In addition, as shown in the rounded example in which water is pushed up to the cell wall by the centrifugal force during stirring, the drainage hole opening is in contact with the bottom of the cell, and a part of the drainage vibrator that is an extension of the opening is at the liquid level.) By setting the upper sK, it is possible to prevent the hawk from being naturally discharged by the siphon due to stirring, external pressure, etc., and to make the cell effectively discharge the liquid when the liquid is discharged.

[Brief explanation of the drawing]

Figure fil1 is a schematic sectional view showing the analysis device according to the present invention,
#I2 is a cross-sectional view showing a comparative example of a measurement cell, and FIGS. 3 and 4 are cross-sectional views showing a defining cell according to the present invention. A... Definition cell, l... Container, 2... Frame, 3... Electrode, 4... 7 7 7'
, 5... Magnetic star 2-16... Stirrer,
7...Test liquid, 8...Drainage bonder,
9... Water supply bonder, lo, 16... Drain hole,
11...Buffer container. Representative Patent Attorney Kensuke Norichika (1 other person) Figure 1 A Figure 3 Figure 4/ρ L'

Claims (1)

[Claims] A stirrer placed in a container is rotated by a magnetic star 2 provided outside the TMS device, and an electrode provided in the container is provided so as to be in contact with the test liquid while stirring the test liquid. A measurement cell for analyzing liquid components, in which a drainage hole provided in the container is arranged near a portion where the bottom of the container and the container 1Ithl intersect.