【摘要】 目的建立工作场所空气中丁二烯的溶剂解吸、毛细管气相色谱测定方法。方法以活性炭管吸附空气中丁二烯,用二氯甲烷解吸,毛细管色谱柱分析,FID检测器检测。结果空气中丁二烯的浓度在0.1~4.0 mg/m(3以采集100 L空气样品计,相当于丁二烯标准溶液浓度10~400μg/ml)时,回归方程y=0.898x-2.06,相关系数为0.999 7,最低检出限为0.6μg/ml,最低检测质量浓度为6μg/m(3以采集100 L空气样品计)。平均解吸效率为93.2%,样品在4℃下可保存3 d。结论该方法采样方便,测定灵敏、准确,适用于工作场所空气中丁二烯的浓度测定。更多还原

【Abstract】 Objective To establish a gas chromatography method for the determination of butadiene in the air of workplace by solvent desorption.Methods Butadiene in the air was adsorbed by active carbon tube,and dichloromethane was used for solvent desorption,then the sample was analyzed by GC(FID) with capillary column.Results The linear regression equation was y=0.898x-2.06,at the target concentration of 0.1-4.0 mg/m3 in air(r=0.999 7).The detection limit was 0.6 μg/ml.The average desorption efficiency was 93.2%.Active carbon tube sampling butadiene tightly closed could be stored for three days at 4 ℃ and the results still remained stable.Conclusion This method is simple,sensitive,accurate and applicable to the determination of butadiene in the air of workplace.更多还原