Simultaneous detection of 6 isomers of dimethylaniline in workplace air by gas chromatography / 中国职业医学
China Occupational Medicine
; (6): 572-577, 2020.
Article
em Zh
| WPRIM
| ID: wpr-881940
Biblioteca responsável:
WPRO
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.
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Índice:
WPRIM
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Revista:
China Occupational Medicine
Ano de publicação:
2020
Tipo de documento:
Article