XAD-7吸附-毛细管柱气相色谱法测定工作场所空气中乙二醇

摘要

The method of determining ethylene glycol in the air of workplace was established by ion ex-change resin XAD-7 adsorption-capillary column gas chromatography. Experimental results showed good linear relationship in the range of 0 mg/L~1 116 mg/L and the lowest detection limit was 0. 88 mg/L. The minimum detectable concentration was 0. 11 mg/m3 when the sampling volume was 7. 5 L. The relative standard deviation (RSD) of standard solution of ethylene glycol was 1. 3%. The blank standard addition recoreries were between 80 . 1%and 107%, the collection efficiency was 98 . 0%.%采用离子交换树脂XAD-7吸附-毛细管柱气相色谱法测定工作场所空气中乙二醇,结果表明,该方法在0 mg/L~1116 mg/L 范围内线性良好,方法检出限为0.88 mg/L,当采样体积为7.5 L 时,最低检出质量浓度为0.11 mg/m3。乙二醇标准溶液测定结果的RSD为1.3%,空白加标回收率为80.1%~107%,方法的采集效率为98.0%。