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Washing method for gas chromatographic glass liner tubes

A gas chromatograph and liner technology, which is applied in the cleaning field of gas chromatographic glass liner, to achieve the effect of ensuring accuracy and reducing experiment cost

Active Publication Date: 2017-06-13
山东奥斯瑞特检验检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of cleaning method of gas chromatographic glass liner, to solve the above-mentioned existing technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Digestion steps of pollutants: prepare concentrated hydrochloric acid: concentrated nitric acid = 1:5 mixed acid solution, after the preparation is completed, let the acid solution stand overnight to remove nitrogen oxides in the acid solution, take out the glass wool in 50 liners, Put it into the mixed acid solution, the mixed acid solution has covered all the liners, and soak for 48 hours.

[0017] Further removal of pollutants: in order to put the beaker with the liner and mixed acid into the ultrasonic cleaner, the ultrasonic time is 10 minutes.

[0018] Removal of acid solution: take out the liner in the acid solution after sonication, and rinse it with ultrapure water for 6 times, and the amount of each rinse for each glass liner is 15 ml.

[0019] Deactivation of the liner: Clean the glass liner with an organic solvent such as acetone, dry it, soak it in 5% DMCS / n-hexane overnight, take out the liner, wash it with methanol three times immediately, and then soak i...

Embodiment 2

[0022] Pollutant digestion step: use the mixed acid in Example 1, take out the glass wool in 100 liners, put them into the mixed acid solution, add mixed acid until the mixed acid solution covers all the liners, and soak for 48 hours.

[0023] Further removal of pollutants: in order to put the beaker with the liner and mixed acid into the ultrasonic cleaner, the ultrasonic time is 8 minutes.

[0024] Removal of acid solution: take out the liner in the acid solution after sonication, and rinse it with ultrapure water for 5 times, and the amount of each rinse for each glass liner is 12 ml.

[0025] Deactivation of the liner: Clean the glass liner with an organic solvent such as acetone, dry it and soak it in 5% DMCS / n-hexane overnight. Take out the liner, wash it with methanol three times immediately, and then soak it in methanol for about one hour. Take it out, dry it, and store it under dry conditions together with silane, etc.

[0026] In the present embodiment, the 100 gla...

Embodiment 3

[0028] The digestion step of pollutant: use the mixed acid in embodiment 2. Take out the glass wool from the 70 liners, put them into the mixed acid solution, cover all the liners with the mixed acid solution, and soak for 48 hours.

[0029] Further removal of pollutants: in order to put the beaker with the liner and mixed acid into the ultrasonic cleaner, the ultrasonic time is 6 minutes.

[0030] Removal of acid solution: take out the liner in the acid solution after sonication, and rinse it with ultrapure water for 4 times, and the amount of each rinse for each glass liner is 10 ml.

[0031] Deactivation of the liner: Clean the glass liner with an organic solvent such as acetone, dry it and soak it in 5% DMCS / n-hexane overnight. Take out the liner, wash it with methanol three times immediately, and then soak it in methanol for about one hour. Take it out, dry it, and store it under dry conditions together with silane, etc.

[0032] In the present embodiment, the 70 glass...

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Abstract

The invention discloses a washing method for gas chromatographic glass liner tubes. The washing method comprises the steps of contaminant digesting, further removing of contaminants, acid liquor removing and liner tube deactivating. According to the washing method for the gas chromatographic glass liner tubes, for the washed glass liner tubes, various contaminant residues can be thoroughly removed and destroyed, interference-free detection is achieved, experimental measurement results are more accurate, the accuracy of the experimental results is greatly improved, meanwhile, the glass liner tubes can be recycled and processed in batches, and the labor cost and the experiment cost of a laboratory are saved.

Description

technical field [0001] The invention relates to a cleaning method for a gas chromatographic glass liner, which belongs to the field of chemical instrument cleaning. Background technique [0002] The gas chromatographic glass liner is frequently polluted by samples. Long-term high-temperature heating makes the pollutants firmly adhere to the glass liner inlet. The contaminated liner is difficult to clean thoroughly, and the dirty liner is easy to leak out. Strange peaks, ghost peaks, and miscellaneous peaks interfere with the experiment. The goal of cleaning is to prevent strange peaks, ghost peaks, and miscellaneous peaks from appearing. Many units have no way to use the liner as a one-time consumable, but the liner is expensive, and it is not suitable for units with insufficient financial resources. [0003] At present, there is no special machine and tool for cleaning the liner in the market, and the existing cleaning utensils and cleaning methods for ordinary glass test ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/08B08B9/093B08B3/12
CPCB08B3/12B08B9/0804B08B9/0813
Inventor 尚涛尹燕鞠国栋张力伟周海燕刘德军
Owner 山东奥斯瑞特检验检测有限公司