摘要
建立气相色谱-质谱法同时测定谷类、根茎类蔬菜中24种邻苯二甲酸酯的方法。样品经正己烷-水或者正己烷-丙酮-水提取,正己烷层浓缩至干后定容,气相色谱-质谱联用仪测定,内标法定量。方法具有良好线性,相关系数r均大于0.999,检测限在0.001～0.1mg/kg之间,平均回收率在78.7%～113.2%范围内,相对标准偏差为0.4%～14.4%。采用该方法对国内市售谷类、根茎类蔬菜中邻苯二甲酸酯进行检测,实际样品中检出了邻苯二甲酸二乙酯、邻苯二甲酸二丁酯、邻苯二甲酸二(2-乙基己)酯和邻苯二甲酸二异壬酯等。此方法可满足目前谷类、根茎类蔬菜中邻苯二甲酸酯的检测要求。
A method for simultaneous determination of 24 phthalate acid esters（PAEs） in cereals and root vegetables was developed.Samples were extracted by n-hexane/distilled water or n-hexane/acetone/distilled water.The collected supernatants were vacuum-concentrated to dryness and re-dissolved in n-hexane.PAEs were measured by gas chromatography-mass spectrometer（GC-MS） using internal standard method.The correlation coefficients（r） of 24 PAEs were over 0.999 with detection limits between 0.001 mg/kg and 0.1 mg/kg.The average recoveries of 24 PAEs in cereals and root vegetables varied from 78.7% to 113.2%,with relative standard deviations（RSDs） between 0.4% and 14.4%.The migration amount of PAEs plasticizers in cereals and root vegetables was investigated by this method,diethyl phthalate,di-n-butyl phthalate,di-2-ethylhexyl phthalate and di-iso-nonyl phthalate were found in some commercial samples.This method is well suitable for the analysis of PAEs in cereals and root vegetables.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2013年第16期164-168,共5页
Food Science
基金
"十二五"国家科技支撑计划项目(2011BAK10B04)
关键词
邻苯二甲酸酯
气相色谱-质谱法
谷类
根茎类蔬菜
phthalate acid esters
gas chromatography-mass spectrometry（GC-MS）
cereal
root vegetables
