JP3107640U - Auto multi-sample measurement system - Google Patents

Abstract

An object of the present invention is to effectively and quickly remove contamination of different specimen samples and other samples and dirt adhering to a sample suction nozzle and a sample transport line, which cause measurement errors in measuring a liquid sample. And
An improved autosampler according to the present invention has a cleaning liquid tank arranged on a part of the same circumference as the sample bottles arranged on the improved turntable, and includes a pump unit, a cleaning liquid tank, a filtration filter, and a cleaning liquid tank. The cleaning liquid filtered by the cleaning liquid circulation system is circulated, and cleaning liquid with high cleanness is always supplied to the cleaning liquid tank as cleaning liquid between samples, and the liquid level of the cleaning liquid is positioned above the liquid level of the sample. For example, the cleaning between the samples is surely performed, and the cause of the measurement error due to the sample contamination or dust attached to the nozzle or the like can be remarkably reduced.
[Selection] Figure 2

Description

The present invention relates to an autosampler that automatically switches and supplies a liquid sample to a liquid particle measuring instrument or the like.

In general, measuring instruments, analyzers, and the like for measuring a large number of specimens automatically analyze a plurality of samples, and therefore, an auto sampler that can automatically switch and supply liquid samples is used. FIG. 1 is a diagram showing an example in which a turntable autosampler 2 is combined with a sample suction type sampler 1 using a vertical movement arm 1a. The sample bottles 2b arranged on the same circumference are moved to the sampler measurement position by rotating the turntable 2a, and the vertical movement arm 1a is moved up and down to automatically target various samples. Supplied to measuring instruments and analyzers.

Cleaning between each sample is performed by arranging a bottle containing a cleaning liquid on the same circumference as the bottle 2b containing a liquid sample, and alternately supplying them.

However, in the cleaning method between the samples as described above, since the cleaning liquid is put into a bottle having the same volume as the sample bottle 2b, the cleaning liquid is contaminated by a small amount of the sample adhering to the nozzle 1b and the cleaning effect is lowered.

In order to improve the cleaning effect, even if continuous cleaning is performed with several cleaning bottles between samples, the liquid level of the previous measurement sample is above the liquid level of the cleaning liquid, so the part that is not cleaned If the sample occurs or the sample adhered to the nozzle 1b remains, it is difficult to improve the cleaning effect.

Therefore, the present invention was devised to solve the above-mentioned problems, and it causes a measurement error in measuring a liquid sample. Contamination of different specimen samples, the sample suction nozzle 1b and the sample transport The purpose is to effectively and quickly remove other samples and dirt adhering to the line.

In order to achieve the above object, the improved autosampler according to the present invention has a cleaning liquid tank 3b arranged on a part of the same circumference as the sample bottle 2b arranged on the improved turntable 3a, and a pump unit 3c, The cleaning liquid filtered by the cleaning liquid circulation system including the cleaning liquid tank 3d, the filtration filter 3e, and the cleaning liquid tank 3b is circulated.

As an effect of the present invention, by circulating the cleaning liquid in the circulation system, a cleaning liquid with high cleanliness is always supplied to the cleaning liquid tank 3b as a cleaning liquid between the samples, and the liquid level of the cleaning liquid is higher than the liquid level of the sample. If it is positioned above, each sample is reliably cleaned, and the cause of measurement error due to sample contamination or dust adhering to the nozzle 1b or the like can be remarkably reduced.

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

FIG. 2 is a schematic view of an improved autosampler according to the present invention. Reference numeral 3f denotes a base, and the improved turntable 3a is rotated by driving means of a motor 3g provided therein.

Improved autosampler Integrated with the improved turntable 3a, which is the driving part of FIG. 2, a pump unit 3c, a filtration filter 3e, and a cleaning liquid tank 3b comprising three tanks are installed on the turntable, and the improved turntable 3a A ring-shaped cleaning liquid storage tank 3d is provided inside the base so as to hang from the base, thereby forming a cleaning liquid circulation system on the drive part.

FIG. 3 is a block diagram of the cleaning liquid circulation system. The cleaning liquid stored in the cleaning liquid storage tank 3d is sucked by the pump unit 3c and supplied to the first tank of the cleaning liquid tank 3b through the coarse filtration filter 3e-1 and the fine filtration filter 3e-2. The cleaning liquid tank 3b is composed of three tanks, and partition plates having different heights are provided between the tanks. The cleaning liquid overflowing in the first tank is poured into the second tank and the third tank in order, It is returned to the original cleaning liquid storage tank 3d due to the difference in height from the tank.

During sample measurement, a two-step cleaning process is performed to perform an effective cleaning. The first cleaning is a rough cleaning and the second tank of the cleaning tank 5 is used, and then the second cleaning is a precision cleaning. Use one tank. In this triple cleaning tank, the cleaning liquid in the first tank is kept cleaner than that in the second tank due to overflow. The third tank is a tank for returning the cleaning liquid to the cleaning liquid storage tank.

This cleaning tank is installed in three holes on the turntable for receiving sample bottles on the same circumference, and this cleaning process is performed by a sample suction type sampler using a vertical moving arm. It can be performed with the same movement as the sample measurement.

It is the schematic of a conventional autosampler and a sample suction type sampler. It is the schematic of the improved autosampler concerning this invention. It is a block diagram of a cleaning fluid circulation system. It is a general-view figure which shows the overflow system of a washing | cleaning-liquid tank.

Explanation of symbols

1 ---------- Sample suction type sampler
1a --------- Vertical movement arm
1b --------- Nozzle
2 ---------- Conventional autosampler
2a --------- Conventional turntable
2b --------- Sample bottle
3a --------- Improved turntable
3b --------- Cleaning bath
3c --------- Pump unit
3d --------- Tank for cleaning liquid
3e --------- Filtration filter
3f --------- Base
3g -------- Motor

Claims (1)

In an automatic multi-analyte measurement system that automatically switches and supplies liquid samples, liquid samples arranged on the same circumference are sequentially supplied to the measuring instrument, and the liquid contact part of the detection part of the measuring instrument and its sample supply piping For the purpose of cleaning the wetted parts to the specified cleanliness, a circulation system consisting of a cleaning layer, pump unit, filter unit, cleaning liquid storage tank and water supply / drainage pipe is installed on the rotary stage of the automatic multi-sample measurement system. In addition, by purifying the cleaning solution by circulating the cleaning solution, it improves the cleaning effect, removes sample contamination effectively and quickly, and incorporates a precision circulation type filtration system that enables automatic operation. A system is provided.

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