气相色谱法测定饮品中一氯乙酸含量  

GC Determination of Monochloroacetic Acid in Drink

作　　者：陈章捷[1] 杨方[1] 陈金凤[1] 钟坚海[1] 钱疆[1] 

机构地区：[1]福建出入境检验检疫局,福州350001

出　　处：《理化检验（化学分册）》2012年第11期1335-1337,1340,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：福建省科技攻关重点项目(2010Y0001)

摘　　要：提出了气相色谱法测定饮品中一氯乙酸含量的方法。样品经甲基叔丁基醚萃取,再经甲醇衍生后用DB-1701石英毛细管色谱柱分离,电子捕获检测器检测。选择1,2-二溴丙烷作为内标物。一氯乙酸的浓度在低、中、高3个浓度范围内的线性相关系数均大于0.996 0,方法测定下限(10S/N)小于10.0μg·kg-1。以8种空白饮品为基体,在3个添加水平进行加标回收试验,平均回收率在72.4%～107%之间,5家实验室测定值的相对标准偏差(n=6)在0.39%～9.0%之间。Gas chromatography was applied to the determination of monochloroacetic acid in drinks. The sample was extracted with methyl tert-butyl ether, and the extract was derivatized with methanol. DB-1701 quartz capillary chromatographic column was used for separation and electron capture detector was used for determination with 1,2-dibromopropane as internal standard. Values of correlation coefficient in 3 ranges of low, middle and high concentration found were more than 0. 996 0. Values of lower limit of determination （10S/N） found were less than 10. 0μg·kg-1. Using blank sample of drinks as matrixes, recovery was tested at 3 different concentration levels and values of recovery found were in the range from 72.4%to 107% with RSD＇s （n=6） in the range from 0. 39% to 9.0%.

关 键 词：气相色谱法 饮品 一氯乙酸 

分 类 号：O657.7[理学—分析化学]