Simultaneous detection of 6 isomers of dimethylaniline in workplace air by gas chromatography
10.11763/j.issn.2095-2619.2020.05.013
- Author:
Weifeng RONG
1
;
Banghua WU
1
;
Weijie LING
;
Jiawen HU
1
;
Ruibo MENG
1
;
Jiaheng HE
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;
Dimethylaniline;
Air sampling tube;
Gas chromatography
- From:
China Occupational Medicine
2020;47(05):572-577
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE: To establish a method for simultaneous detection of 6 isomers of dimethylaniline(DMA) in workplace air by gas chromatography(GC). METHODS: The vapor and aerosol DMA in workplace air were collected by GDH-1 air sampling tube, and desorbed and eluted with absolute ethanol, then separated by a special capillary column for amines analysis, and finally detected by GC-flame ionization detector. RESULTS: The quantitative detection range of 6 isomers of DMA was 0.26-226.66 mg/L, with all the correlation coefficients greater than 0.999 00. The minimum detectable concentration was 0.01-0.02 mg/m~3, and the minimum quantification concentration was 0.04-0.05 mg/m~(3 )(15.00 L sample, 2.00 mL sample solution). The average desorption and elution efficiency was 92.48%-104.60%. The within-run relative standard deviations(RSD) was 0.31%-4.51%, and the between-run RSD was 1.23%-6.03%. The samples can be sealed and stored for more than 19 days at room temperature. CONCLUSION: The method is suitable for simultaneous detection of 6 isomers of DMA in workplace air.
