摘要
本文建立了气相色谱分析及液相-质谱确证方法对5种动物食品中丙线磷残留量的检测方法。5种动物样品经过乙腈提取,过氟罗里硅土固相萃取柱净化,气相色谱仪选择FPD检测器,液相色谱-串联质谱仪(带EI源)进行丙线磷残留量的分析和确证分析。气相色谱法中丙线磷在5～400μg/kg内含量与其峰面积呈现良好的线性关系,相关系数为0.999,检测低限为10.0μg/kg。丙线磷添加浓度在10.0、50.0、200.0μg/kg时,添加回收率分别在76.2%～110.0%之间。液质联用作为丙线磷的确证方法,检测低限为5.0μg/kg。结果表明:本文建立的丙线磷检测和确证方法简便、经济、快速、准确。
A method was established and confirmed to determine the ethoprophos residues in five animal-derived foods by gas chromatography and LC-MS/MS. After extracted and cleaned up with SPE cartridges, the concentration of ethoprophos residues were analyzed by GC with FPD and confirmed by LC-MS/MS with El. There was a good linear relationship between the peak area value and the concentration of ethoprophos within range of 5-400μg/kg （correlation coefficient = 0.999） and GC detection limit was 10.0μg/kg. When the fortified concentration of ethoprophos was 10.0, 50.0, 200.0μg/kg, the recoveries were between 76.2%-110.0%. The method were confirmed by LC-MS/MS with El and the detection limit was 5.0μg/kg. The results showed that the method was simple, inexpensive, fast and accurate.
出处
《检验检疫科学》
2008年第4期33-37,共5页
Inspection and Quarantine Science
基金
国家质量监督检验检疫总局2007制标项目:2007B842
广州市科技攻关重大项目:2006Z1-E0121
