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Chromatographic analysis-based pretreatment sample gas stripping absorption device and method

An absorption device and chromatographic analysis technology are applied in the field of pretreatment sample gas stripping absorption devices, which can solve the problems of environmental pollution, inability to realize solid sample analysis, and complicated operation steps.

Active Publication Date: 2017-12-19
QUFU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chromatographic analysis has high requirements on samples, and most samples must undergo complex pretreatment before chromatographic analysis. For biological, environmental and food samples, due to the complex matrix, low concentration of measured components and interfering components Many, it is usually necessary to separate and enrich this type of sample after pretreatment. Therefore, a gas stripping and absorption device and method for pretreatment samples based on chromatographic analysis is an important chemical analysis device and method. The pretreatment sample air-lifting absorption device and method based on chromatographic analysis, commonly used methods include solid-phase extraction, Soxhlet extraction and liquid-liquid extraction, but the above-mentioned method has cumbersome operation steps, large consumption of reagents, and easy pollution to the environment. There are also green extraction methods such as liquid-liquid microextraction, gas purge and trap, etc., which are playing an increasingly important role in chromatographic analysis, but liquid-liquid microextraction methods are limited to liquid sample extraction, and cannot be used to analyze solid samples. , the gas flow purge and trap technology does not require or only requires a small amount of organic solvents during the entire extraction process, and can achieve high-fold enrichment and concentration of low-concentration targets in solid samples, but the existing gas flow purge and trap methods can only For the analysis of compounds with similar densities, it is impossible to achieve effective extraction and enrichment pretreatment of compounds with large density differences such as biological, environmental and food samples

Method used

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  • Chromatographic analysis-based pretreatment sample gas stripping absorption device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The steps are as follows:

[0064] Step 1, put 0.5000 g of fish sample into extraction bottle 1, add 1mL of 0.1M pH=10 sodium bicarbonate buffer solution in absorber 2 to extract volatile phenol in the sample as absorption liquid,

[0065] Step 2, turn on the nitrogen gas, heat the sample bottle to 250° C., so that the purge gas passes through the communication channel of the first input pipe 42 and the second output pipe 53 to purge the fish sample in the extraction bottle 1 for 30 minutes,

[0066] In step 3, the gas stripping extract enters the absorber 2 through the connecting channel of the first input pipe 42 and the second output pipe 53, and is absorbed by the extraction reagent.

Embodiment 2

[0068] The steps are as follows:

[0069] Step 1, put 0.5000 grams of food packaging material into the extraction bottle 1, add 1mL of 0.1M sodium hydroxide absorption solution to the absorber 2 to extract the volatile acid in the sample,

[0070] Step 2, open the carrier gas argon, heat the sample bottle to 200°C, make the purge gas purge the food packaging material in the extraction bottle 1 for 5 minutes through the communication channel of the second input pipe 43 and the first output pipe 52, adjust The multi-way valve I6 and the multi-way valve II7 allow the purge gas to purge the food packaging material in the extraction bottle 1 for 5 minutes through the communication channel of the first input pipe 42 and the second output pipe 53, and switch the multi-way valve I6 and Multi-way valve Ⅱ7, interactive extraction for 30 minutes,

[0071] In step 3, the air stripping extract enters the absorber 2 through the communication channel between the second input pipe 43 and the...

Embodiment 3

[0073] The steps are as follows:

[0074] Step 1, put 0.5000 g of soil into extraction bottle 1, add 1 mL of acetonitrile absorption liquid into absorber 2 to extract volatile aldehyde compounds,

[0075] Step 2: Turn on the nitrogen gas, heat the sample bottle to 250°C, make the purge gas purge the soil in the extraction bottle 1 for 5 minutes through the channel connected by the second input pipe 43 and the first output pipe 52, and adjust the multi-way valve I6 and multi-way valve I6. Open the valve II7 so that the purge gas can purge the soil in the extraction bottle 1 for 5 minutes through the channel connected by the first input pipe 42 and the second output pipe 53, and alternately extract for 30 minutes by switching the multi-way valve I6 and the multi-way valve II7.

[0076] In step 3, the air stripping extract enters the absorber 2 through the communication channel between the second input pipe 43 and the first output pipe 52 and the communication channel between the...

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Abstract

The invention discloses a chromatographic analysis based pretreated sample gas stripping and absorbing device and method. The chromatographic analysis based pretreated sample gas stripping and absorbing device comprises a gas stripping and absorbing device body, a multiway valve I6 and a multiway valve II7, wherein the gas stripping and absorbing device body is provided with an input pipe 4 and an output pipe 5, the multiway valve I6 is arranged in the input pipe 4, the multiway valve II7 is arranged in the output pipe 5, the input pipe 4 is provided with at least two output port parts, and the output pipe 5 is provided with at least two input port parts.

Description

technical field [0001] The invention relates to a pretreatment sample gas lift absorption device and method, in particular to a pretreatment sample gas lift absorption device and method based on chromatographic analysis. Background technique [0002] Chromatographic analysis has high requirements on samples, and most samples must undergo complex pretreatment before chromatographic analysis. For biological, environmental and food samples, due to the complex matrix, low concentration of measured components and interfering components Many, it is usually necessary to separate and enrich this type of sample after pretreatment. Therefore, a gas stripping and absorption device and method for pretreatment samples based on chromatographic analysis is an important chemical analysis device and method. The pretreatment sample air-lifting absorption device and method based on chromatographic analysis, commonly used methods include solid-phase extraction, Soxhlet extraction and liquid-liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/20
CPCG01N30/20G01N2030/201
Inventor 张世娟李言信盛存存尤进茂
Owner QUFU NORMAL UNIV