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Method for detecting chloroacetic acid in air in workplace

A workplace and detection method technology, applied in the field of chemical determination, can solve the problems of toxic reagents, coexisting substances interference, tightening, etc., and achieve the effects of high sensitivity, simple operation and good precision

Inactive Publication Date: 2014-04-23
山东安和安全技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The method of using ion chromatography to determine small molecular 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.
[0004] Therefore, the application of ion chromatography is far from enough. In order to overcome these shortcomings and improve the application of ion chromatography in occupational health detection, it is very necessary to intensify the research on ion chromatography detection methods for toxic substances in the workplace air.

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  • Method for detecting chloroacetic acid in air in workplace
  • Method for detecting chloroacetic acid in air in workplace
  • Method for detecting chloroacetic acid in air in workplace

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Embodiment １

[0023] 1Materials and methods

[0024] 1.1 Instrument Metrohm 883 ion chromatograph, 863 automatic sampler, 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 / 150mg silica gel inside), 0.45μm water-based microporous membrane.

[0025] 1.2 Reagent chloroacetic acid (chromatographically pure, Chengdu Aike Chemical Reagent Co., Ltd.), deionized water (resistivity> 18MΩ·cm), NaHCO 3 (Superior grade pure, Tianjin Komiou Chemical Reagent Co., Ltd.), acetone (superior grade pure, Laiyang Economic and Technological Development Zone Fine Chemical Factory).

[0026] 1.3 method

[0027] 1.3.1 Sampling Open both ends of the silica gel sampling tube at the sampling site, connect the 150mg end to the air sampler, flow 0.3L / min, and collect for 15min. Pour the sampled front and back two pieces of silica gel into a 20ml...

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Abstract

The invention discloses a method for detecting chloroacetic acid in air in a workplace. The method uses a silica gel sampling tube to collect chloroacetic acid, uses deionized water as stripping liquid, and uses an anion chromatographic column for assay determination, being a rapid, sensitive, accurate and low-cost method for detecting chloroacetic acid in the workplace with an ion chromatography. Thus, a new practical way is provided for detecting chloroacetic acid in air in the workplace, and the application of the ion chromatography to occupational health surveillance is widened.

Description

technical field [0001] The invention relates to the technical field of chemical determination methods, in particular to a method for detecting chloroacetic acid in the air of a workplace. Background technique [0002] Chloroacetic acid is an important raw material for organic synthesis, widely used in pesticides, medicine, printing and dyeing and other fields. Chloroacetic acid is chemically active and highly corrosive, and 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 is usually performed by gas chromatography. According to GBZ / T160.59-2004 "Determination of Carboxylic Acid Compounds in Air Toxic Substances in the Workplace", the sampling flow rate for the detection of chloroacetic acid is 1.0L / min, which is easy to cause Sampling penetrates, and the sensitivity of the method is low, the operation is time-consuming and cumbersome, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 朱富强李月红苏成华郭茹董庆鹏赵冰
Owner 山东安和安全技术研究院有限公司
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