铬天青S分光光度法测定茶汤中的铝含量  

Determination of aluminum content in tea infusions by chrome azure S spectrophotometry

作　　者：胥艳[1,2] 王彦兵[1] 胡卫平[1] 朱金花[1] 刘绣华[1,3] 王宝杰 

机构地区：[1]河南大学化学化工学院环境与分析科学研究所,河南开封475004 [2]河南省鄢陵县疾病预防控制中心,河南鄢陵461200 [3]河南省天然药物与免疫工程重点实验室,河南开封475004

出　　处：《食品工业科技》2012年第14期64-67,71,共5页Science and Technology of Food Industry

基　　金：中国博士后科学基金资助(20110490992)

摘　　要：采用浓缩-湿法消化对茶汤进行前处理,用分光光度法测定茶汤中的铝含量,建立了浓缩-湿法消解-铬天青S分光光度法测定茶汤中铝的方法。实验结果表明,本方法前处理简单易行,检测结果准确度、灵敏度高、精密度好,在0～6μg/25mL浓度范围内,呈良好的线性关系,相关系数r=0.9997,样品的加标回收率在96.7%～100%,RSD为1.84%,该法方便、简单、快速、准确、可靠,适合茶汤中铝的测定。A spectrophotometric method was established to determine the content of aluminum in tea infusions, with which these samples were pretreated by concentration-wet digestion,followed by measurement of aluminum via chrome azure S spectrophotometric solution. A linear relationship between the aluminum content and absorbency was found in the range of 0-6.0μg/25mL. The related coefficient,recoveries and RSD were 0.9997,96.7%-100%, 1.84% ,respectively. The results indicated that the method was convenient,rapid, accurate, reliable, sensitive and suitable for measurement of aluminum in tea soup.

关 键 词：铬天青S 浓缩 湿法消化 茶汤 铝 分光光度法 

分 类 号：TS201.2[轻工技术与工程—食品科学]