China Occupational Medicine 2020;47(02):200-203

doi:10.11763/j.issn.2095-2619.2020.02.015

Improvement of detection method for acetonitrile in workplace air

Guanlin CHEN 1 ; Yingying ZHAO 1 ; Yingqing XIE 1 ; Jianyi LIANG 1 ; Juan LI 1 ; Chunxia LUO 1 ; Songgen CHEN 1

Affiliations

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Keywords

Workplace; Air; Acetonitrile; Gas chromatography; Solvent desorption

Country

China

Language

Chinese

Abstract

OBJECTIVE: To improve the standard detection method for acetonitrile in workplace air. METHODS: Acetonitrile in the air of workplace was collected by silica gel, eluted with methanol, separated and determined by gas chromatography with flame ionization detection. RESULTS: After the improvement of the method, the linear range of acetonitrile was 1.57-1 574.00 mg/L, and the correlation coefficient was 0.999 98. The detection limit was 0.29 mg/L and the minimum detection concentration was 0.19 mg/m~(3 )(collected sample volume was 1.5 L). The average desorption efficiency was 93.1%-98.9%. The within-run and between-run precision was 2.6%-3.3% and 1.7%-3.6%, respectively. The samples could be stored at room temperature for at least 10 days. CONCLUSION: The improved method is precisied, accurate and simple to operate, which is suitable for determination of acetonitrile in workplace air.