水作载流-原子荧光光谱法测定不同部位茶叶中的硒  

Determination of Selenium in Tea by Water as Current Carrying-Atomic Fluorescence Spectrometry

作　　者：马琳 杨珍 贺攀红[1,2] 杨有泽 孙银生[1,2] 肖国原 Ma Lin;Yang Zhen;He Panhong;Yang Youze;Sun Yinsheng;Xiao Guoyuan(Henan Province Nuclear Industry Geology,Zhengzhou 450044,China;Henan Radionuclide Detection Center of Nuclear Industry,Zhengzhou 450044,China;Chongqing Mintai New Agricultural Science and Technology Development Group Co.,Ltd.,Chongqing 400060,China)

机构地区：[1]河南省核工业地质局,河南郑州450044 [2]河南省核工业放射性核素检测中心,河南郑州450044 [3]重庆民泰新农业科技发展集团有限公司,重庆400060

出　　处：《山东化工》2022年第12期127-129,共3页Shandong Chemical Industry

基　　金：2018年度重庆市第五批科技计划项目(cstc2018jszx-cyzdX0114)。

摘　　要：建立水作载流-原子荧光光谱法测定茶叶中痕量硒的分析方法。采用湿法消解茶叶样品,测定时改变传统稀酸作载流的进样方式,以水作载流断续进样,并讨论了硼氢化钾、氢氧化钠浓度、盐酸酸度以及主量元素、微量元素和氢化物对硒测定的影响。结果表明:湿法消解样品,以水为载流可以满足实验要求,不仅节省了试剂的用量,还消除了管路的记忆效应,方法检出限为0.0699μg/L,样品的加标回收率为96.2%~107.5%,相对标准偏差在5%以内。该方法操作方便、检测速度快、灵敏度高,适合茶叶中硒含量的测定,有利于茶叶的深加工,为今后开发富硒茶提供参考。A method for the determination of trace selenium in tea by water current-carrying atomic fluorescence spectrometry was established.The tea samples were digested by wet method,and the traditional dilute acid as current carrier was changed to water as current carrier.The effects of potassium borohydride concentration,sodium hydroxide,acidity of hydrochloric acid,major elements,trace elements and hydrides on the determination of selenium were discussed.The results show that wet digestion of samples can meet the experimental requirements by using water as carrier current,which not only saves the amount of reagents,but also eliminates the memory effect of pipelines.The detection limit of this method is 0.0699μg/L,the recovery rate of samples is 96.2%~107.5%,and the relative standard deviation is less than 5%.The method is easy to operate fast and sensitive.It is suitable for the determination of selenium content in tea.It is beneficial to the deep processing of tea and provides a reference for the development of selenium-rich tea in the future.

关 键 词：水作载流 原子荧光光谱法 茶叶 硒 

分 类 号：TQ171.721[化学工程—玻璃工业] O657.31[化学工程—硅酸盐工业]