离子色谱法测定茶叶中无机阴离子及其用于茶叶的分类  

Determination of Inorganic Anions in Chinese Tea by Ion Chromatography and Its Application to Classification of Tea

作　　者：余卫娟[1,2] 张杰[2] 殷月芬[1] 叶朝霞[2] 王海勇[2] 庞明[2] 俞丽琅 

机构地区：[1]国家海洋局第一海洋研究所青岛市现代分析技术及中药标准化重点实验室,青岛266061 [2]嘉兴市环境保护监测站,嘉兴314000

出　　处：《理化检验（化学分册）》2012年第3期272-274,279,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：福建省科技厅茶叶质量控制研究项目(NO.2006N0043);海洋行业标准制定项目[国海环字(2008)288号]

摘　　要：提出了离子色谱法测定茶叶中F-、Cl-、NO2-、Br-、NO3-、H2PO4-、SO42-等无机阴离子的方法。采用Shodex IC SI-52 4E阴离子分离柱进行分离,以3.6mmol.L-1碳酸钠溶液和甲醇以体积比98比2混合所得溶液为淋洗液进行洗脱,从而实现7种阴离子的分离。根据茶叶中分离出的7种阴离子含量的不同,利用聚类分析将16个茶叶样品进行分类。Ion chromatography was applied to the determination of F-,Cl-,NO2-,Br-,NO3-,H2PO4-and SO42-in Chinese tea.Shodex IC SI-52 4E anion-exchange column was used for separation,and a mixed solution of 3.6 mmol·L-1 Na2CO3 solution and methanol mixed in the ratio of 98 to 2 by volume was used as eluent.A total of 16 kinds of tea samples of different categories were taken as testing samples,based on the different contents of the 7 inorganic anions,the tea samples were classified by applying the clustering analysis.

关 键 词：离子色谱法 茶叶 无机阴离子 聚类分析 

分 类 号：O657.7[理学—分析化学]