摘要
针对蔬菜中多环芳烃（PAHs）基质复杂、检测干扰太大的问题，采用正己烷-丙酮混合溶剂进行索氏提取，提取液经氢氧化钾皂化，硅胶-氧化铝层析柱净化后，用GC-MS进行检测。检出限较低（〈0．04μg／kg），回收率稳定（平均值为75％．82％），相对标准偏差为1．1％-14．6％，是测定蔬菜中16种PAHs的较好方法。
A method was developed for the determination of 16 PAHs in vegetable by gas chromatography- mass spectrometry（ GC -MS）. The clean-up of the sample extract with KOH saponification and H2SO4 sulfonation were compared. It was found that the average recovery for the 16 PAHs obtained by the saponification and sulfonation clean-up were 94% and 60% , respectively. The sample was pretreated as follows： Soxhlet extraction with a mixture of hexane and acetone solvents, clean-up with KOH saponification, then further clean-up with silica - aluminum oxide chromatographic column. The detection limits, recoveries and relative standard deviations for the 16 PAHs were in the range of 0. 008 - 0.04 μg/kg, 75% - 82% and 1.1% - 14.6% , respectively.
出处
《分析测试学报》
CAS
CSCD
北大核心
2007年第4期530-532,536,共4页
Journal of Instrumental Analysis
基金
广东省科学院优秀科技人才基金支持项目(编号:02-2)
