Determination of difluorochloromethane in workplace air by direct injection gas chromatography
10.11763/j.issn.2095-2619.2020.04.020
- Author:
Jiawen HU
1
;
Weifeng RONG
1
;
Meizhen GAO
;
Ruibo MENG
1
;
Jiaheng HE
1
;
Delin XIE
;
Banghua WU
1
Author Information
1. Guangdong Province Hospital for Occupational Disease Prevention and Treatment,Guangdong Provincial Key Laboratory of Occupational Disease Prevention and Treatment Guangzhou,Guangdong 510300,China
- Publication Type:Journal Article
- Keywords:
Workplace;
Air;
Difluorochloromethane;
Gas chromatography;
Direct injection;
Determination
- From:
China Occupational Medicine
2020;47(04):475-477
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE: To establish a method of determination of difluorochloromethane in workplace air by direct sampling gas chromatography. METHODS: Difluorochloromethane in workplace air was collected with aluminum plastic composite film airbag and then directly injected. Difluorochloromethane was separated by DB-1 capillary column and detected with hydrogen flame ionization detector. RESULTS: Good linearity was obtained in the range of 1.50-15 042.90 mg/m~3 with the correlation coefficient of 0.999 96. The limit of detection was 1.26 mg/m~3 and the limit of quantitation was 3.78 mg/m~3. The minimum detection concentration was 1.26 mg/m~3 and the minimum quantification concentration was 3.78 mg/m~3. The standard recovery was 98.34%-99.19%. The within-run relative standard deviation(RSD) and the between-run RSD were 1.82%-3.72% and 2.17%-4.17%, respectively. The samples can be stored at room temperature for at least 7 days. CONCLUSION: This method is suitable for difluorochloromethane detection in workplace air.
