工作场所空气中乙二醇丁醚的毛细管气相色谱测定法

Detecting 2-butoxy ethanol in the air of workplaces by gas chromatography

目的建立工作场所空气中乙二醇丁醚的气相色谱测定法。方法工作场所空气中乙二醇丁醚用活性炭采样管采集，二氯甲烷／甲醇解吸后进样，经毛细管色谱柱分离，氢焰离子化检测器检测，以保留时间定性，峰面积定量。结果乙二醇丁醚在56．3—901．0μg／ml范围内呈线性关系。相关系数为0．9999；方法的检出限为2．0μg／ml；定量下限为5．0μg／ml，在采样体积为7．5L，解吸液体积为1．0ml的条件下，方法的最低检出浓度为0．27mg／m3；不同浓度的乙二醇丁醚相对标准偏差为3．04％。7．93％；加标回收率为92．7％～95．5％。结论该方法灵敏度高，精密度好，准确度好，适用于工作场所空气中乙二醇丁醚的测定。

Objective To establish a gas chromatographic method for detecting 2-butoxy ethanol in the air of workplaces. Methods After the air samples were collected with activated carbon tubes and desorbed with methylene chloride/methanol, the target toxicant was separated with FFAP capillary columns and detected with flame ionization detector, qualified by retention time and quantified by peak area. Results The linear range of 2-butoxy ethanol in air of workplace was 56.3-901.0 μg/ml, the correlation coefficient was 09999. The limit of detection was 2.0 μg/ml. The limit of quantity was 5.0 μg/ml. The minimal detecting concentration was 0.27mg/m3 in the condition of 7.5L sampling volume and lml desorbed volume. Relative standard deviation was 3.04%-7.93% and the recovery was 92.7%-95.5%. Conclusion In present study the detecting method with high sensitivity, precision and accuracy can be used to determine 2-butoxy ethanol in the air of workplaces.