[Determination of chloroacetic acid in workplace air by silanization-gas chromatography].
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi
; 39(4): 299-302, 2021 Apr 20.
Article
em Zh
| MEDLINE
| ID: mdl-33910294
ABSTRACT
Objective:
A method to determine acrylic acid in workplace air was developed by silanization-gas chromatography.Methods:
In March 2020, chloroacetic acid in air were absorbed by silica gel tube, the samples were dried, then were desorbed and silanized by acetonitrile N, O-bis (trimethylsilane) trifluoroacetamide (2â¶1, V/V) at room temperature, allowed quantitative analysis of chloroacetic acid as its silanization product by gas chromatography.Results:
Calibration curve of the method was linear within the range 0-162.8 µg/ml and showed good linearity with linear equation y=0.011 8x, r=0.999 7. The determination limit of the method was 0.8 µg/ml, and the minimum detection concentration was 0.05 mg/m(3) (collect 15 L air) . The relative standard deviation (RSD) was 0.5%-1.3% (n=5) . Recoveries were between 98.6%-101.2%.Conclusion:
The results prove silanization-gas chromatography is an accurate, simple and high sensitive method for determining chloroacetic acid in workplace air.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Local de Trabalho
/
Poluentes Ocupacionais do Ar
Idioma:
Zh
Ano de publicação:
2021
Tipo de documento:
Article