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目的建立工作场所空气中仲丁醇的气相色谱测定法。方法用活性炭采样管采集工作场所空气中仲丁醇,以含1%异丙醇的二硫化碳解吸后进样,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。结果仲丁醇在101.2~1 620.0μg/ml范围内呈线性关系,相关系数为1.000 0;方法的检出限为3.0μg/ml,定量下限为10.0μg/ml;在采样体积为1.5 L、解吸液体积为1.0 ml的条件下,方法的最低检出浓度为2.0 mg/m~3,最低定量浓度为6.7 mg/m~3。不同浓度仲丁醇的相对标准偏差(RSD)为2.79%~4.76%,加标回收率为96.5%~97.4%。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仲丁醇的测定。
Objective To establish a gas chromatography method for the determination of sec-butanol in workplace air. Methods The activated carbon sampling tube was used to collect sec-butanol in the air of the workplace. The sample was desorbed with 1% isopropanol and desorbed. The sample was separated by capillary column and detected by hydrogen flame ionization detector. The retention time was qualitative and the peak area was quantified . Results The concentration of sec-butanol in the range of 101.2-1 620.0 μg / ml showed a linear relationship with a correlation coefficient of 1.000 0. The detection limit was 3.0 μg / ml and the limit of quantification was 10.0 μg / ml. When the sample volume was 1.5 L, The minimum detection concentration of this method was 2.0 mg / m ~ 3 and the minimum concentration was 6.7 mg / m ~ 3 when the volume of desorption solution was 1.0 ml. The relative standard deviations (RSDs) of sec-butanol at different concentrations ranged from 2.79% to 4.76%, and the recoveries were in the range of 96.5% to 97.4%. Conclusion The method has high sensitivity, good precision and good accuracy. It is suitable for the determination of sec-butanol in the air of workplace.