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Sampling device of small samples

A sampling device and small-volume technology, applied in the field of hot cells, can solve problems such as complex operation process, high requirements for staff's vision and operating experience, difficulty in ensuring accuracy and precision, etc., to achieve simple operation, reduce labor intensity, improve Effects of Accuracy and Precision

Active Publication Date: 2011-08-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is the more advanced sampling device and sampling method at present. This sampling device has the advantages of intuition and reliability, but has the following disadvantages: (1) The operation process is complicated and requires high vision and operating experience of the staff.
(2) It is difficult to guarantee the accuracy and precision when taking small-volume samples, especially the sampling of micro-volume (micro-upgrade) samples

Method used

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  • Sampling device of small samples

Examples

Experimental program
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Effect test

Embodiment 1

[0017] When the present embodiment adopts the syringe 4 to pump 1.8mL, the sample is filled with the quantitative loop 2 of 1.0034mL at this time, for the HNO of 0.905mol / L and 2.923mol / L 3 Parallel sampling.

[0018] The sampling process is as follows:

[0019] When sampling, the operator puts the six-way valve 1 in the sampling state through the six-way valve switching switch 9, that is, figure 1 In the state where the solid line of the six-way valve 1 is open, the manipulator inserts the sampling tube into the sample bottle 7, the syringe 4 pumps 1.8 mL of air, and the sample fills the quantitative loop 2 to complete the accurate pipetting of the sample. When the sample is out, the operator puts the six-way valve 1 in the sample out state through the six-way valve switching switch 9, that is, figure 1 In the state where the dotted line of the six-way valve 1 is connected, the manipulator inserts the sample tube into the sample dilution bottle 8, turns on the dilution pump...

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Abstract

The invention discloses a sampling device of small samples. The device comprises a six-way valve (1), a sample loop (2), a dilution pump (6) and a runner tube; the six-way valve (1) is respectively connected with the sample loop (2) and the dilution pump (6) by the runner tube, and is connected with an isolated gas extraction system (3) by the runner tube, and the isolated gas extraction system (3) is formed by connecting a U-type water sealing tube (5) with an injector (4). The sampling device has the advantages of simple structure and operation, high sampling accuracy, good precision, quicksampling and reduced labor intensity of operators.

Description

technical field [0001] The invention relates to the field of hot cells, in particular to a sampling device for radioactive small-volume samples in a hot cell. Background technique [0002] In the analysis laboratory of the reprocessing plant, quantitative sampling, dilution, separation and other operations of strong radioactive samples need to be carried out in the hot chamber, such as the solution of spent fuel, the feed of the main process 1 cycle and some process samples are strong radioactive samples. Strongly radioactive samples are not only highly radioactive (>100Ci / L), but also chemically toxic (very toxic), and are prone to aerosols, so they must be operated under strict shielding and protection conditions, that is, in a hot room. The hot cell is a thick-walled cast iron box or steel box (the wall thickness is related to the maximum operability), and the outside is covered with heavy concrete with a thickness of 0.5m-1m. The thickness of the lead glass is in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/14
Inventor 吴继宗张丽华刘焕良牟凌钱红娟范德军汪南杰
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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