顶空/气相色谱-质谱法检测奶粉中1,1-二氯乙烯(顺反混合)  

Determination of 1,1-Dichloroethylene(Cis-Trans Mixture)in Milk Powder by Headspace Gas Chromatography-Mass Spectrometry

作　　者：汪健健 WANG Jianjian(Institute of Food Inspection and Testing,Jiangxi General Institute of Inspection and Certification,Nanchang 330052,China)

机构地区：[1]江西省检验检测认证总院食品检验检测研究院,江西南昌330052

出　　处：《食品安全导刊》2024年第8期56-58,共3页China Food Safety Magazine

摘　　要：通过优化实验条件,建立了顶空/气相色谱-质谱法检测奶粉中1,1-二氯乙烯(顺反混合)含量的方法。结果显示,当平衡温度为90 ℃、平衡时间为30 min时,顺-1,1-二氯乙烯标准曲线方程为Y=816.811 7X+33.184 5,相关系数(r~2)为0.985 1;反-1,1-二氯乙烯的标准曲线方程为Y=571.645 2X+39.587 7,相关系数(r~2)为0.999 8。顺-1,1-二氯乙烯的平均加标回收率在102.70%~111.43%,相对标准偏差在11.0%~13.3%。反-1,1-二氯乙烯的加标回收率在98.42%~105.57%,相对标准偏差在14.6%~16.2%。采用所建方法检测了5批次婴幼儿奶粉发现,样品中不含有1,1-二氯乙烯(顺反混合)。该方法是一种可靠、准确和精密的分析方法,可用于奶粉样品中1,1-二氯乙烯的定量分析。A method for the determination of 1,1-dichloroethene(cis-trans mixture)in milk powder by headspace/gas chromatography-mass spectrometry(GC-MS)was developed by optimising the experimental conditions.The results showed that when the equilibrium temperature was 90℃ and the equilibrium time was 30 min,the standard curve equation of cis-1,1-dichloroethene was Y=816.8117X+33.1845,and the correlation coefficient(r^(2))was 0.9851.The standard curve equation of trans-1,1-dichloroethene was Y=571.6452X+39.5877,and the correlation coefficient(r^(2))was 0.9998.The average recoveries of cis-1,1-dichloroethene ranged from 102.70%to 111.43%with the relative standard deviations of 11.0%to 13.3%.The average recoveries of trans-1,1-dichloroethene ranged from 98.42%to 105.57%with the relative standard deviations of 14.6%to 16.2%.Five batches of infant milk powder were tested by the proposed method and it was found that the samples did not contain 1,1-dichloroethylene(cis-trans mixture).The method is a reliable,accurate and precise analytical method for the quantitative analysis of 1,1-dichloroethylene in milk powder samples.

关 键 词：1 1-二氯乙烯 顶空/气相色谱-质谱法 奶粉 

分 类 号：O657.63[理学—分析化学] TS252.51[理学—化学]