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Occupational health detection method for chloroacetic acid in air

A detection method, the technology of chloroacetic acid, applied in the field of occupational health detection of chloroacetic acid in the air, can solve the problems of less research on carboxylic acid harmful substances, high operating cost of gas chromatography, interference of coexisting substances, etc., and achieve high sensitivity , low cost, good precision

Pending Publication Date: 2022-06-28
南京泰宇环境检测有限公司
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AI Technical Summary

Problems solved by technology

[0003] The method of using ion chromatography to determine small molecule organic carboxylic acids (formic acid, acetic acid, etc.) Less research on harmful substances
In my country, the research on the application of ion chromatography to determine the air in the workplace started relatively late. At present, in the "Determination of Toxic Substances in the Air in the Workplace" standard issued by the National Health and Family Planning Commission of my country, only four kinds of hydrochloric acid, sulfuric acid, iodine, and oxalic acid are listed. Most of the detection methods of ion chromatography still stay on gas chromatography, but gas chromatography has the disadvantages of high operating cost, interference of coexisting substances, and some methods need to use toxic reagents, etc.

Method used

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  • Occupational health detection method for chloroacetic acid in air
  • Occupational health detection method for chloroacetic acid in air

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Embodiment 1

[0021] 1 Materials and methods

[0022] 1.1 Instruments Metrosep 883 ion chromatograph, 863 autosampler, conductivity detector, MetrosepASUPP4-250 / 4.0 conventional anion analysis column (4.0mm×250.0mm). GilAir-5 atmospheric sampler (equipped with low flow adjustment module), silica gel sampling tube (solvent desorption type, with 300mg / 155mg silica gel inside), 0.45μm aqueous microporous membrane.

[0023] 1.2 Reagents: Chloroacetic acid (chromatographic grade), deionized water (resistivity>18MΩ·cm), NaHCO3 (excellent grade), acetone (superior grade).

[0024] 1.3 Methods

[0025] 1.3.1 Sampling Open both ends of the silicone sampling tube at the sampling site, connect the 155mg end to the air sampler, flow 0.3L / min, and collect for 15min. Pour the sampled front and back 2 sections of silica gel into 20ml test tubes with stopper respectively, add 10ml deionized water to each, seal and shake for 1min, resolve for 30min, and filter the desorbed liquid through a 0.45μm aqueous ...

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Abstract

The invention discloses an occupational health detection method for chloroacetic acid in air, which is characterized in that a silica gel sampling tube is used for collecting chloroacetic acid, deionized water is used as a desorption solution, an anion chromatographic column is used for analysis and determination, and a rapid, sensitive, accurate and low-cost method for detecting chloroacetic acid in a working place by ion chromatography is established. A new feasible way is provided for detecting the chloroacetic acid in the air of the workplace, and the application range of the ion chromatography in occupational health monitoring is widened.

Description

technical field [0001] The invention relates to the technical field of chemical determination methods, in particular to an occupational hygiene detection method for chloroacetic acid in the air. Background technique [0002] Chloroacetic acid is an important organic synthesis raw material, which is widely used in pesticides, medicine, printing and dyeing and other fields. Chloroacetic acid has active chemical properties and is highly corrosive. It can invade the human body through the skin, respiratory tract or digestive tract. The main occupational hazard is burns. At present, the determination of chloroacetic acid in the workplace usually adopts gas chromatography. According to GBZ / T160.59-2004 "Determination of Carboxylic Acid Compounds in the Air Toxic Substances in the Workplace", the sampling flow of chloroacetic acid is 1.0L / min, which is easy to cause Sampling penetrates, and its method has low sensitivity, time-consuming and cumbersome operation, and high operating...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 孟声龙王焕庆李星慧
Owner 南京泰宇环境检测有限公司
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