Determination of difluorochloromethane in workplace air by direct injection gas chromatography / 中国职业医学
China Occupational Medicine
;
(6): 475-477, 2020.
Article
in Chinese
| WPRIM
| ID: wpr-881928
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
China Occupational Medicine
Year:
2020
Type:
Article
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