摘要
建立茶饮料中三氯甲烷和四氯化碳的测定方法。采用吹扫捕集技术,三氯甲烷和四氯化碳经吹扫、捕集、解析等过程后进入色谱柱分离,再用质谱仪进行检测。三氯甲烷和四氯化碳的浓度分别在0～10μg/L和0～5.0μg/L范围内呈很好的线性关系,相关系数(r^2)分别为0.999 7和0.999 8。三氯甲烷的回收率和精密度分别为99.0%～104.0%、2.6%～7.1%,四氯化碳的回收率和精密度分别为94.4%～99.1%、0.7%～3.3%,检测限分别为0.5μg/L和0.2μg/L。本方法操作简单、灵敏度高、精密度优良,非常适合茶饮料中三氯甲烷和四氯化碳的测定。
A method was established for determination of the chloroform and tetrachloromethane in tea drinks.Methods Using purge and trap technique,chloroform and tetrachloromethane were purged,trapped anddesorbed by Purge ＆ Trap instrument,then detect by mass spectrometry after separation on chromatographiccolumn. Results It shows a good linear relationship for chloroform and tetrachloromethane in0 -10 μg/L （r2=0.9997）and 0-5.0 μg/L （r2=0.9998）,respectively. The recoveries were in range of 99.0 %-104.0 % and94.4 %-99.1%,the RSDs were 2.6 %-7.1 % and 0.7 %-3.3 % for chloroform and tetrachloromethane,respectively. The detection limits were 0.5 μg/L for chloroform and 0.2 μg/L for tetrachloromethane respectively.Conclusion The method can be applied for determination of chloroform and tetrachloromethane in tea drinks withhigh sensitivity, good precision and simple in operation.
作者
姚蕴恒
白龙律
田海峰
康辰凯
陶晓杰
朴文香
YAO Yun-heng;BAI Long-lü;TIAN Hai-feng;KANG Chen-kai;TAO Xiao-jie;PIAO Wen-xiang(Product Quality Inspection Institute of Yanbian Korean Autonomous Prefecture, Yanji 133000, Jilin,China;College of Engineering, Yanbian University, Yanji 133002, Jilin, China)
出处
《食品研究与开发》
CAS
北大核心
2018年第11期126-130,共5页
Food Research and Development
关键词
茶饮料
三氯甲烷
四氯化碳
吹扫捕集
气质联用
tea drinks
chloroform
tetrachloromethane
purge and trap
gas chromatography -massspectrometry
