活性炭吸附/二硫化碳解析-气相色谱法测定环境空气中11种苯系物
杜明月,林勇,葛璇,郭龙,李晓凡,黄岩,范国兰
山东省济南生态环境监测中心,济南 250102
Determination of 11 benzene series in ambient air by activated charcoal adsorption/carbon disulfide desorption-gas chromatography
杜明月,林勇,葛璇,郭龙,李晓凡,黄岩,范国兰
Jinan Eco-Environment Monitoring Center of Shandong Province, Jinan 250102, China
摘要:活性炭吸附/二硫化碳解析-气相色谱法测定环境空气中11种苯系物的方法。采用活性炭管采集环境空气,1.0 mL二硫化碳萃取解析50 min,柱流量为0.5 mL/min,经HP-Innowax型毛细管色谱柱(30 m×0.53 mm,1.00 μm)分离后,用氢火焰离子化检测器的气相色谱法测定。当采样体积为10 L时,11种苯系物的质量浓度在0.002~5.00 mg/m3范围内与色谱峰面积线性关系良好,相关系数均大于0.9990,检出限均为0.002 mg/m3。平均加标回收率为87.1%~106.6%,测定结果的相对标准偏差均为1.3%~8.6%(n=6)。该方法简化了采样和实验步骤,一次采样多次分析,适用于环境空气中11种苯系物的测定。
Abstract:A method was eatablished for the determination of 11 benzene series in ambient air by activated charcoal adsorption/carbon disulfide desorption-gas chromatograpy. Ambient air was collected by activated charcoal adsorption and extracted by 1.0 mL carbon disulfide for 50 min, separated by the HP-Innowax capillary column (30 m×0.53 mm, 1.00 μm) with the column flow rate was 0.5 mL/min, and analyzed by gas chromatography with hydrogen flame ionization detector. When the sampling volume was 10 L, the 11 benzene series had good linear relationship with their chromatographic peak area in the range of 0.002-5.00 mg/m3, the correlation coefficients of the quantitative method were more than 0.9990, the detection limits were 0.002 mg/m3. The average of recoveries were in the range of 87.1%-106.6% and the relative standard deviations were 1.3%-8.6%(n=6). The method is simplified the sampling operation and test procedure with the advtantage of multiple detemination and one sampling at one time, it is suitable for the determination of 11 benzene series in ambient air.
关键词:活性炭吸附;二硫化碳解析;苯系物;气相色谱法
Keywords:activated charcoal adsorption; carbon disulfide desorption; benzene analogies; gas chromatograpy
基金:济南市科技局社会民生专项(201807008)
本文引用格式:
杜明月,林勇,葛璇,等.活性炭吸附/二硫化碳解析-气相色谱法测定环境空气中11种苯系物[J].化学分析计量,2021,30(7):12.
Du Mingyue,Lin Yong,Ge Xuan,et al. Determination of 11 benzene series in ambient air by activated charcoal adsorption/carbon disulfide desorption-gas chromatography[J]. Chemical Analysis and Meterage,2021,30(7):12.
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