摘要
城区总悬浮物中油烟(肉类烹调释放的浮尘)占有相当比重。在目前研究中 ,将油烟中存在的极性有机化合物转化成三甲基硅(烷)衍生物 ,并用气相色谱/质谱测定仪分析。硅化能够使油烟萃取物中单酸甘油脂的检测得以实现 ,同时能够使胆固醇的检测得以提高。我们对加州贝克斯费尔德收集的大气微尘样品中的化合物进行了检测 ,其丰度显示出大气与油烟来源样品高度一致。数据说明饱和单酸甘油脂和胆固醇适合用作油烟的示踪物。
Fine particulate matter emitted during meat cooking is known to contribute a significant fraction of the total fine aerosol concentration in urban areas.ln the present study, polar organic compounds in meat smoke fine particulate matter are converted to their trimethylsilyl derivatives and analyzed by gas chromatography/mass spectrometry. Silylation enables the detection of monoglycerides in the meat smoke extracts and enhances the detection of cholesterol.These compounds are detected in atmospheric fine particle samples collected in Bakersfield,CA,with relative abundances that show substantial agreement between the meatsmoke source samples and the atmosphere.The data suggest that the saturated monoglycerides,as well as cholesterol,may be suitable for use as tracers for the atmospheric particles generated by meat cooking operations.
出处
《世界环境》
2000年第3期35-36,共2页
World Environment
