Method for determining content of methanol in air of work place

A workplace, methanol content technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as inability to automatically inject samples, water damage to chromatographic columns, etc., achieve long sample shelf life, high result stability, and reduce detection out-of-limit effect

Inactive Publication Date: 2015-02-04
GRATECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the damage of water to the chromatographic column and the defects caused by the inability to automatically inject samples in the existing determination method, the present invention provides a convenient sampling method with a high degree of automation using static headspace gas chromatography to analyze the air in the workplace. Methods for Methanol Detection

Method used

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  • Method for determining content of methanol in air of work place
  • Method for determining content of methanol in air of work place
  • Method for determining content of methanol in air of work place

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] 1. Preparation of standard curve and others

[0041] (1), sampling

[0042] Use short-time sampling. At the sampling point, open both ends of the silica gel tube (GH-I solvent desorption type silica gel tube 6×12mm; 200mg / 100mg silica gel inside), and collect air samples for 15min at a flow rate of 100mL / min. The sampling volume is 1.5L. air sample. Immediately after sampling, seal both ends of the silicone tube with a plastic cap, put it in a clean container, store and transport at room temperature.

[0043] (2), instruments and reagents

[0044] Personal air sampler (Beijing Zhongxi Yuanda Technology Co., Ltd., model QR7-ZR3600);

[0045] Shimadzu GC-2010 gas chromatograph with hydrogen flame ionization detector (FID);

[0046] DANI 44 position automatic headspace sampler;

[0047] Methanol stock solution: add an appropriate amount of water to a 100ml volumetric flask, add a certain amount of methanol after accurate weighing, and then accurately weigh, make up to...

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Abstract

The invention provides a method for determining the content of methanol in air of a work place. The method comprises the following steps: collecting an air sample by using a silicone tube, dissolving the air sample by pure water, carrying out static headspace sample introduction, and detecting through a gas chromatograph (an FID detector). The method is mainly used for detecting the content of methanol in air of the work place.

Description

technical field [0001] The invention relates to the field of analytical methods, in particular to a method for measuring the methanol content in the workplace air Background technique [0002] As an important chemical raw material, methanol has a wide range of uses, but methanol is a highly toxic substance. Long-term exposure to low-dose methanol can cause various chronic respiratory diseases, nasopharyngeal cancer, colon brain tumors, nuclear gene mutations, and even leukemia, etc. etc.; long-term exposure to a small amount can cause chronic poisoning. In addition to headaches, dizziness, and digestive disorders, its characteristic clinical manifestations are reduced visual field and continuously corrected vision loss. Methanol is discharged in the air, causing certain air pollution. Therefore, some workplaces using methanol must be tested to ensure the life and health of workers. [0003] At present, for the determination of methanol in the workplace air, the national st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 徐森彪袁君赵红峰
Owner GRATECH
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