JPH01126539A - Comparison electrode - Google Patents

Abstract

PURPOSE:To achieve a higher performance of an electrolytic part, by making an internal reference liquid always flow with a change in the construction of a comparison electrode to eliminate a film. CONSTITUTION:An internal liquid 6 enters the top 2 of a comparison electrode 2 and flows to the bottom 3 thereof finely through a fit section 7 between the top 2 and a sleeve 8. An internal reference liquid 5 flows to the bottom 3 thereof. The top 2 and the bottom 3 of the comparison electrode are built in a fit construction and fixed with a spring 9. Moreover, a surface treatment of an internal electrode 4 is done by AgBr. A tube is connected to the bottom 3 and the reference liquid 5 flows into the comparison electrode to be poured into a measuring tank at the tip of the electrode. The reference liquid 5 moves to the top 2 and into the bottom 3 and the internal liquid is poured thereinto 5 through the fit construction. This creates a function identical to that of a film to eliminate it. This makes the electrode free from effect of the film, thereby improving the performance of an electrolytic part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrolyte device attached to an automatic blood analyzer of medical equipment, and particularly to a reference electrode suitable for maintainability and performance.

[Conventional technology]

As described in JP-A No. 58-24852, a conventional reference electrode has an internal liquid and an external liquid, and the liquid junction between the external liquid and the sample is a membrane, and the liquid flows out through the membrane. was. Therefore, it is necessary to replenish the external liquid part. Due to membrane contamination, the jackpot potential at the liquid junction becomes unstable.

[Problem that the invention seeks to solve]

In the prior art described above, the membrane and liquid had to be replaced. Because of the presence of a membrane, there were many problems, especially membrane damage, and minute marks were often left behind during liquid exchange. The damage caused liquid to leak through the membrane, affecting the data. In addition, if the membrane is contaminated with dust, flakes, etc., the data will be affected.

The purpose of the present invention is to eliminate the membrane in order to improve the performance of the electrolyte section.

[Means for solving problems]

The above purpose is to change the structure of the reference electrode so that the electrolyte sample solution always flows and remove the membrane. Connect a tube to the bottom of the reference electrode, flow the electrolytic sample solution into the reference electrode, and pour it into the measuring tank from the tip of the reference electrode. The upper part of the reference electrode enters the lower part of the reference electrode, and the internal solution is caused to flow into the electrolyte sample solution by the rubbing structure. This allows it to have the same function as a membrane and removes the membrane. By removing the membrane, the effects of the membrane are eliminated and the objective is achieved.

[Effect]

A motor pulls the internal standard solution under vacuum and sends it into the measurement tank. It is then pulled through a suction nozzle with a vacuum and discharged. This is repeated twice, and then the diluted liquid is similarly pulled under vacuum by a motor and sent into the measuring tank. Serum is sucked up by the sampling nozzle at the same time as the diluent and discharged into the measurement tank.

In order to diffuse the diluent and serum, the diameter of the tip of the serum and diluent discharge portion is narrow. In addition, the measurement tank has a motor underneath that is constantly rotating, sucking up and discharging serum.
Since the motor is used in a vacuum, there is no possibility of malfunctions.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

The rotary sample supply device 15 includes a sample table 16, an analysis measurement section 11, and a drive section that rotates these. The sample table 16 includes a row of ordinary sample containers 26 in which samples to be analyzed are loaded into a plurality of holes on the outer periphery, and a row of special sample containers 26 in which samples for emergency specimens and standard samples are loaded and arranged in a plurality of holes on the inner periphery. 27 are formed, and these sample containers are rotatably transferred to the sample intake position and to 29 as required. Inside the sample table 16 there is a rotatable analysis and measurement tank 11 for sodium ions.

A plurality of ion selection electrodes 21 for potassium ions, chloride ions, etc., and a comparison electrode 1 are extended. These electrodes are adjusted by the sample distribution device 31 so that when the sample sampled from the sample container row is introduced into the analysis measurement unit 11 and diluted with the diluent, the electrodes are immersed in the liquid. .

The reaction section 22 includes a doughnut-shaped constant temperature passage 25 and a rotary reaction table 17 disposed thereon, and the height of the one-rotation reaction table 17 is as follows.

It is almost the same as the sample table 16. The rotary reaction table 17 has a large number of holes, into which reaction vessels 30 made of square transparent cells are loaded to form reaction vessel rows. The lower part of the reaction vessel 30 is immersed in a constant temperature liquid.

The sample dispensing device 31 is composed of a rotary arm 20 holding a sample suction/discharge tube 10 and a vertical and horizontal rotation drive mechanism 18 that rotates the rotary arm 20 vertically and horizontally, and a sample pipettor 19 sucks and discharges the sample. i.e. 0
, inhale the sample at the sample discharge position 23°24,
The sample discharge position 27 of the rotary reaction table 17 is rotated left and right. Then, the sample is discharged at the sample discharge position 28 of the first analysis and measurement tank 11.

Various reagents are added as necessary to the reaction container of the rotary reaction table 17 into which the sample has been discharged by reagent pipetting (not shown), and after a certain reaction time, measurements are taken using a photometer (not shown). Ru.

The reference electrode of the present invention will be explained with reference to FIG.

The diluent is sucked up by a diluent pipette (not shown) and discharged into the stirring tank 12 from a diluent distribution pipe. The internal standard solution is sucked up by an internal standard solution pipette (not shown), passes through the reference electrode 1, and is discharged into the stirring tank 12. The sample is sucked up by the sample pipettor 19 and discharged into the stirring tank.

If the above is described in the order of operation, the internal standard solution is discharged into the stirring tank and then discharged from the suction pipe 13. This is repeated twice, and then the diluted liquid is discharged into the stirring tank.

At the same time, the sample is also discharged into the stirring tank and stirred.

The structure of the comparison electrode 1 of the present invention will be explained with reference to FIG.

It consists of an upper comparison electrode 2 and a lower comparison electrode 3. Lithium bromide 6 enters the upper part 2 of the comparison electrode, and a small amount of lithium bromide 6 flows into the lower part 3 of the comparison electrode from the rubbing part 7 between the upper part 2 of the comparison electrode and the sleeve 8. An internal standard solution 5 flows through the lower part 3 of the reference electrode. The comparison electrode upper part 2 and the comparison electrode lower part 3 have a mating structure and are fixed by a spring 9. The surface treatment of the internal electrodes 4 is AgBr.

FIG. 4 shows a modified example. The rubbing structure portion 7 is made into an ion-sensitive membrane. Also includes other sensitive membranes.

In addition, there are also ceramics injected to provide continuity between the external and internal fluids. Other than changes to the sliding structure,
This is the same as the reference electrode in FIG.

[Brief explanation of the drawing]

FIG. 1 is a detailed sectional view of the present invention, FIG. 2 is an explanation of an apparatus based on the present invention, and FIG. 3 is a schematic configuration diagram of an embodiment of the present invention.
FIG. 4 is a sectional view showing a modification. 1... Reference electrode, 2... Upper reference electrode, 3... Lower reference electrode, 4... Internal electrode, 5... Electrolyte sample solution (internal standard solution), 6... Internal solution ( lithium bromide), 7
... Grinding part, 8 ... Sleeve, 9 ... Spring, 10 ... Sample suction and exhaust pipe, 11 ... Analysis measurement tank, 12
... Stirring tank, 13... Suction pipe, 14... Diluted liquid distribution pipe, 15... Rotary sample supply device, 16...
Sample table, 17... Rotary reaction table, 18.
・・Up/down/left/right rotation movement V& structure, 19・・Sample pipettor, 20・・Rotating arm, 21・・Ion selection electrode, 22・・Reaction part, 23・・Sample discharge position, 24・・
・Sample discharge position, 25... Constant temperature chamber passage, 25... Ordinary sample container row, 27... Special sample container row, 28...
Sample suction position, 29... Sample suction position, 30... Reaction vessel, 31... Sample distribution device, 32... Ceramic, 33... Ion sensitive membrane. 1::

Claims (1)

[Claims] 1. An analyzer that electrochemically analyzes components in an electrolyte sample solution, which consists of an internal electrode using silver/silver bromide, an internal liquid made of lithium bromide, an inner cylinder to hold the internal liquid, and an external liquid. What is claimed is: 1. A comparison electrode having an outer cylinder part through which a liquid flows, and a sleeve part through which an internal liquid and an external liquid part are conducted, the reference electrode being characterized in that an internal standard solution for device calibration is made to flow into the external liquid.