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.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
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]
关键词
离子色谱法
茶叶
无机阴离子
聚类分析
Ion chromatography
Chinese tea
Inorganic anions
Clustering analysis
