Detecting 1,1,1-trichloroethane and 1,1,2-trichloroethane in workplace air by solvent desorption-gas chromatography
10.11763/j.issn.2095-2619.2019.02.018
- Author:
Jiaheng HE
1
;
Yongmei XIAO
1
;
Weifeng RONG
;
Jiawen HU
;
Banghua WU
Author Information
1. School of Public Health, Sun Yat-sen University Guangzhou, Guangdong 510080, China
- Publication Type:Journal Article
- Keywords:
Workplace;
Air;
Trichloroethane;
Gas chromatography;
Solvent desorption
- From:
China Occupational Medicine
2019;46(02):225-232
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE: To establish a method for simultaneous determination of 1,1,1-trichloroethane(TCA) and 1,1,2-TCA in the workplace air by solvent desorption-gas chromatography. METHODS: The 1,1,1-TCA and 1,1,2-TCA in the workplace air were collected by activated carbon tube and desorbed with carbon disulfide. They were separated with DB-1(100.0% dimethyl polysiloxane) capillary column and detected by flame ionization detector. RESULTS: The good linear ranges of 1,1,1-TCA and 1,1,2-TCA were 1.340-1.338×10~4 and 1.440-1.442×10~4 mg/L, respectively. The correlation coefficients were greater than 0.999, with the detection limits of 0.100 and 0.140 mg/L, respectively. The average desorption efficiencies of 1,1,1-TCA and 1,1,2-TCA were 98.6%-99.6% and 94.9%-96.2%. The within-run and between-run relative standard deviations were 0.4%-0.9% and 0.5%-1.1%, respectively. The samples could be stored at room temperature for at least 14 days. CONCLUSION: This method has high desorption efficiency and sensitivity, good precision and simple operation, which is suitable for simultaneous detection of 1,1,1-TCA and 1,1,2-TCA in the workplace air.
