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Method for analyzing tert-butyl methyl ether in soil by purge-and-trap and GC-MS

A methyl tertiary butyl ether, purging and trapping technology, applied in analytical materials, material separation, measuring devices, etc., can solve the problems of low sensitivity of static headspace method, heavy pollution of organic reagents, large human error, etc. Pre-processing is simple and fast, the method is simple and fast, and the method is simple and practical

Inactive Publication Date: 2018-01-05
NANJING BAIYUN CHEM ENVIRONMENTAL MONITORING
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Problems solved by technology

The liquid-liquid extraction method has heavy organic reagent pollution and large human error, and the static headspace method has low sensitivity and poor precision, which cannot meet the needs of existing technologies

Method used

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  • Method for analyzing tert-butyl methyl ether in soil by purge-and-trap and GC-MS

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Embodiment Construction

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0020] A method for analyzing methyl tertiary butyl ether in soil by purge and trap-gas chromatography, comprising the steps of:

[0021] 1. Experimental content:

[0022] Accurately weigh 5g of soil, put it into a rotor, add 5ul internal standard / surrogate mixed standard (concentration is 10ug / ml), put the mixture into the purge and trap device, and remove methyl tert-butyl in the soil base ether for purge and trap extraction.

[0023] 2. The methyl tert-butyl ether after trapping and extraction is analyzed by gas chromatography-mass spectrometry, and the analysis conditions of the purging and trapping device are:

[0024] Purge flow: 40mL / min; Purge temperature: 40°C; Preheat time: 2min; Purge time: 11min; Desorption temperature: 180°C; Desorption time: 2min; Baking temperature: 200°C; Baking time : 5min; transfer line temperature: 200°C. ...

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Abstract

The invention relates to a method for analyzing tert-butyl methyl ether in soil by purge-and-trap and GC-MS. The method for analyzing tert-butyl methyl ether in soil by purge-and-trap and GC-MS comprises the following steps: (1) purge-and-trap extraction is carried out for tert-butyl methyl ether in soil; (2) after trap extraction in the step (1), tert-butyl methyl ether is analyzed by GC-MS. Theinvention provides the method for analyzing tert-butyl methyl ether in soil with simplicity, high efficiency and accuracy, purge-and-trap pretreatment and standard quadrupole mass spectrum all scanning surface analysis are used for tert-butyl methyl ether in soil, the method is simple and rapid, content of methyl tert butyl ether in the soil can be accurately detected, and substance monitoring blank of soil can be filled.

Description

technical field [0001] The method relates to a method for testing and analyzing methyl tert-butyl ether in the field of soil monitoring, in particular to a method for analyzing methyl tert-butyl ether in soil by purge and trap-gas chromatography. Background technique [0002] MTBE is a substance in volatile organic compounds. When the concentration in soil is low, it must be enriched before it can be determined. In the pretreatment method, the commonly used enrichment methods include liquid-liquid extraction method, static headspace method, purge and trap method, etc. The liquid-liquid extraction method has heavy organic reagent pollution and large human error, and the static headspace method has low sensitivity and poor precision, which cannot meet the needs of the existing technology. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the invention provides a method for analyzing methyl tert-butyl ether in soil by purge and trap-gas chromato...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/08
Inventor 王秋艳朱文静杨红
Owner NANJING BAIYUN CHEM ENVIRONMENTAL MONITORING
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