摘要
[目的]建立工作场所空气中二甲胺的溶剂解吸气相色谱测定方法。[方法]采用硅胶管吸附空气中二甲胺,用酸性醇溶液解吸,再用碱性溶液中和后,进样气相色谱,使用高液担比的碱性色谱柱分离,FID检测器测定。[结果]该方法在测定范围79.7～478.2μg/mL时,线性方程为=1040.2x-25148(r=0.9999)。最低检出限为5μg/mL;最低检出浓度为1.3mg/m(3采样体积7.5L);解吸效率86%～91%;穿透容量>7.75mg(200mg硅胶);样品于4℃冰箱内可保存7d。[结论]本研究建立的方法适合于工作场所空气中二甲胺浓度的监测。
[Objective] To develop a method for the determination of dimethylamine in the air of workplace by solvent desorption/gas chromatography.[Methods] Dimethylamine in the air was sampled by silica gel tube and then desorbed by alcoholic solution with little acid. After neutralized by alkali,the solution was separated by basic column and detected by GC-FID.[Results] The liner equation was =1 040.2x -25 148（r = 0.999 9）in the concentration range of 79.7-478.2 μg/mL. The detection limit was 5 μg/mL ;the minimum detectable concentration was 1.3 mg/m3（the air sample was 7.5 L）. The desorption efficient was 86%-91%.The breakthrough volumes was more than 7.75 mg（200 mg silica gel）. The sample could stay 7 d at 4℃ in the refrigerator[. Conclusion] The method is suitable for the determination of dimethylamine in the air of workplace.
出处
《环境与职业医学》
CAS
北大核心
2010年第4期232-235,共4页
Journal of Environmental and Occupational Medicine
关键词
二甲胺
工作场所空气
硅胶管
气相色谱
dimethylamine
workplace air
silica gel
gas chromatography
