气相色谱法测定工作场所空气中的乳酸正丁酯  

Determination of n-Butyl lactate in air in a workplace by gas chromatography

作　　者：高岩[1] 余波[1] 曲宁[1] 

机构地区：[1]辽宁省疾病预防控制中心,沈阳110005

出　　处：《中国卫生检验杂志》2008年第1期83-84,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：建立工作场所空气中乳酸正丁酯溶剂解吸气相色谱测定方法。方法：活性炭采集空气中的乳酸正丁酯,用二氯甲烷＋甲醇（95＋5）溶剂解吸,采用气相色谱法在FFAP色谱柱上分离,FID检测器测定。结果：空气浓度在0-1960 mg/m3时,回归方程为Y=240904X＋5728118,r=0.9992;最低检出限为1.6×10-4μg/ml（进样1.0μl）,最低检出浓度为0.05 mg/m3（以采集3.0 L空气样品计）;相对标准偏差（RSD）为1.2%-76%,平均解吸效率为97.3%;室温下样品至少可保存14 d。结论：本方法适用于工作场所空气中乳酸正丁酯浓度的测定。Objective：To establish a gas chromatography method for determination of n-Butyl lactate in the air in a workplace by solvent desorption.Methods：n-Butyl lactate in the air was adsorpted by charcoal tube sampling and solvent desorption using methylene chloride＋methanol（95＋5）,then analyzed by GC with（FID）dectermination with FFAP capillary column.Results：The linear regression equation was Y=240904X＋5728118,between 0~1960 mg/m3 of target concentration in the air,r=0.9992.The detection limit was 1.6×10-4 μg/ml.The minimal detection concentration was 0.05 mg/m3（sampleing 3.0 Lair）,and relative standard between 1.2%~7.6%.The average desorption efficiency was 97.3%.Charcoal tube sampling n-Butyl lactate could at least store 14days at ambient temperature and its results still remained stable.Conclusion：The method is suitable to measure n-Butyl lactate concentration in the air at a workplace.

关 键 词：空气 气相色谱 乳酸正丁酯 溶剂解吸 

分 类 号：O657.71[理学—分析化学]