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采用气相色谱质谱法测定食用油、蔬菜水果类、水产畜禽肉类、乳类及酒水饮料类的5类食品中塑化剂-邻苯二甲酸二丙酯(DPRP)和邻苯二甲酸己酯2-乙基己基酯(HEP)的测定,提取试剂的选择分别为乙腈、正己烷乙醚乙腈混合醚及正己烷乙酸乙酯混合醚,采用超声提取;SILICA/PSA玻璃固相萃取小柱净化;对样品前处理、色谱/质谱条件的选择、色谱柱的选择进行了讨论,线性范围为0.05μg/mL~1.00μg/mL,并在浓度范围内有良好的线性关系,r=0.998 6~0.999 9,方法检出限为0.15 mg/kg,在此浓度的试验相对标准偏差1.6%~5.9%,方法回收率为83.2%~117%。方法简便、快速、灵敏,适用于测定食品中邻苯二甲酸二丙酯(DPRP)和邻苯二甲酸己酯2-乙基己基酯(HEP)。
Gas chromatography-mass spectrometry (GC-MS) was used to determine the content of plasticizer-dipropyl phthalate (DPRP) and phthalic acid-hexahydrophthalic anhydride in five kinds of foods such as edible oil, vegetables and fruits, Ester 2-ethylhexyl ester (HEP). The extraction reagents were acetonitrile, n-hexane and ether-acetonitrile mixed ether and n-hexane and ethyl acetate mixed ether. ; The pretreatment of samples, the selection of chromatographic / mass spectrometry conditions and the selection of columns were discussed. The linear range was 0.05μg / mL ~ 1.00μg / mL, and there was a good linear relationship in the range of concentration, r = 0.998 6 ~ 0.999 9, the detection limit was 0.15 mg / kg. The relative standard deviations (RSDs) at this concentration ranged from 1.6% to 5.9%. The recoveries were between 83.2% and 117%. The method is simple, rapid and sensitive and is suitable for the determination of dipropyl phthalate (DPRP) and 2-ethylhexyl phthalate (HEP) in food.