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Purification method of gas purging sample and batch purification method thereof

A purification method and gas purging technology, applied in the field of chemical analysis, can solve problems such as easily damaged gaskets, and achieve the effect of preventing contamination, reducing the possibility, suitable length and position

Pending Publication Date: 2022-04-12
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for purifying samples by gas purging to solve the problem that the needle used for purging and purging the samples in the prior art is easy to damage the sealing gasket

Method used

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  • Purification method of gas purging sample and batch purification method thereof
  • Purification method of gas purging sample and batch purification method thereof
  • Purification method of gas purging sample and batch purification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A method for purging a sample with gas, comprising the steps of:

[0050] Step 1, insert one or more of the purification needles on the sealing gasket 6 on the top of the sample bottle 7, the needle tip of the needle body 1 enters below the liquid surface, and the bottom of the air tank 5 extends into the sealing gasket 6, the top protrudes above the sealing gasket 6; when the sample bottle 7 is purged by a single gas purging sample purification needle, the loss of the sealing gasket 6 can be reduced;

[0051] Step 2, pass the purge gas through the inlet 2, and the tail gas containing impurities is discharged from the sample bottle 7 through the gas tank 5 until the impurity gas in the sample bottle 7 is completely discharged; the purging time of this step is generally 10 to 180 Minutes, determined according to purification requirements and purge flow)

[0052] Step 3, maintain the passage of purge gas, prevent air (or other impurity gas) from flowing back through the ...

Embodiment 2

[0060] An automatic batch purification method based on the purification method, comprising the following steps:

[0061] Step S1, press as Figure 5 As shown, 48 purification needles are fixed in a 6*8 matrix on the air outlet 18 at the bottom of the air needle shunt module 10 through the air needle joint, the joint is sealed, and the purification needle passes through the guide on the needle guide plate 12. hole 14;

[0062] Press as Figure 5 As shown, 48 sample vials 7 are placed on the sample holder 9 in a 6*8 matrix.

[0063] Step S2, finally put the sample holder 9 into the fixing groove 23 of the lower positioning plate 11 to fix it;

[0064] Step S3, such as Figure 6 As shown, the nitrogen bottle is connected to the purge gas inlet 16 of the intake module 15, the interface is sealed, and the nitrogen bottle is opened. The nitrogen gas is divided into 8 paths through the intake module 15, and enters the gas needle shunt module 10 after the flow rate is controlled b...

Embodiment 3

[0073] The automatic batch purification method described in Example 2 is completed through the execution system of gas purging sample purification, and the execution system includes a positioning frame, a driving device 8, a sample holder 9, and a gas needle splitting module 10, wherein:

[0074] The positioning frame includes a lower positioning plate 11, a needle guide plate 12, and an upper positioning plate 13 arranged sequentially from bottom to top, and the air needle shunting module 10 is located between the upper positioning plate 13 and the needle guide plate 12 , the bottom of the gas needle shunting module 10 is fixed with the purification needles arranged in a matrix as described in embodiment 1, and the purge gas enters each purification needle respectively after passing through the gas needle shunting module 10;

[0075] The needle guide plate 12 is provided with guide holes 14 arranged in a matrix, and the bottom of the purification needle passes through the corr...

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Abstract

The invention discloses a purification method and batch purification method for gas purging samples, a purification needle comprises a needle body, the top of the needle body is provided with an inlet for purging gas to enter, the needle tip at the bottom of the needle body is provided with an outlet for purging gas to flow out, the center of the needle body is provided with a through cavity, and the through cavity is provided with a through hole. The needle body is provided with an inlet and an outlet, the inlet and the outlet are respectively positioned at two ends of the cavity, the side wall of the needle body is provided with at least one sunken gas groove for tail gas to flow out, the depth of the gas groove is smaller than the thickness of the side wall, and the length of the gas groove in the length direction of the needle body is greater than the length of a sealing gasket on a sample bottle. The purification needle can reduce damage of a sealing gasket of a sample bottle so as to ensure the sealing performance, and the execution system can automatically complete purging and purification of batch samples, so that time and labor are saved.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a gas purging sample purification method and an automatic batch purification method thereof. Background technique [0002] The following two methods are usually used for traditional nitrogen purging to purify samples: the first method uses double needles for purging, specifically, such as Figure 1A As shown, insert two thin needles of different lengths into the sealing gasket of the sample bottle mouth, then turn the sample bottle upside down, insert a short needle into the sample solution, blow in nitrogen gas, and extend the other long needle out of the sample solution to discharge The impurity gas in the sample bottle; the second type uses a composite trocar to purify, specifically, such as Figure 1B As shown, the composite trocar includes a thick needle and a thin needle nested inside the thick needle, the needle heads of the thick needle and the thin needle are f...

Claims

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Application Information

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IPC IPC(8): G01N1/34
Inventor 张琳余海棠刘福亮李科
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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