Determination of hydrazine in workplace air by gas chromatography with large bore capillary column
10.3760/cma.j.cn121094-20200401-00164
- VernacularTitle:工作场所空气中肼测定的大口径毛细管柱气相色谱法
- Author:
Xiaojuan LI
1
;
Yingxia HE
;
Jian WU
;
Linyun ZHANG
;
Run YANG
;
Wenliang JI
;
Baoli ZHU
Author Information
1. 210009 南京，江苏省疾病预防控制中心
- Keywords:
Hydrazines;
Chromatography, gas;
Workplace;
Air;
Hydrazine derivative
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2021;39(4):296-299
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To determine hydrazine quantitatively in workplace air by gas chromatography with large bore capillary column.Methods:In October 2019, hydrazine in the air was adsorbed by acid silica gel tube sampling and desorped using sulfuric acid solution. After derivatization with furfural and extraction, the content of hydrazine was determined by DM-FFAP capillary column gas chromatography with flame ionization detector.Results:The linear regression equation was y=353.8 x+21.2 ( r=0.9998) between 0.1-2.0 μg/ml of target concentration. The detection limit was 0.030 μg/ml. The lower limit of quantification was 0.100 μg/ml. If 15 L air sample was collected, the minimum detection concentration was 0.004 mg/m 3 and the minimum quantitative concentration was 0.013 mg/m 3 respectively. The average desorption efficiency was 86.5%-89.4%. The recovery was 94.4%-97.1%. The relative standard deviation was 1.6%-4.9%. Hydrazine and furfural derivative was 2-furaldehyde hydrazine. Conclusion:The method has symmetrical peak shape of hydrazine derivatives chromatographic peaks, short analysis time, easy operation, and is suitable for the determination of the concentration of hydrazine in the air in the workplace.
