悬浮液进样—石墨炉原子吸收光谱法测定茶叶中的铅  

Determination of Lead in Tea Samples by Graphite Furnace Atomic Absorption Spectrometry with Slurry Injection

作　　者：陈雪[1] 郝伟[1] 何咏[1] 李烨[1] 

机构地区：[1]北京市环境保护科学研究院国家城市环境污染控制工程技术研究中心,北京100037

出　　处：《昆明学院学报》2016年第3期58-61,共4页Journal of Kunming University

摘　　要：建立一种快速测定茶叶样品中铅的石墨炉原子吸收的方法.茶叶样品经浓硝酸快速消解,采用曲拉通X-100定容制成悬浮液直接进样测定铅含量.结果表明,茶叶样品中铅的检出限为3.55×10-2mg/kg;4个不同产地茶叶样品中铅的加标回收率在86%~118%之间;相对标准偏差在4%以内;该方法简便、快速、准确,明显提高工作效率,可实现茶叶样品中铅的快速分析.In this paper a graphite furnace atomic absorption spectrometry method was proposed as a quick way to analyze Pb content in teas with slurry injection. The tea samples were digested rapidly with HNO3 and the constant volume of triton X- 100 was applied to form slurry injection to determine lead. The result showed that the detection limit is 3. 55 × 10- 2mg / kg; the recoveries of the lead in the tea samples from four different producing areas are 86% —118% and RSD is less than 4%. This is a simple,rapid and accurate method with high efficiency to analyze lead in tea samples.

关 键 词：石墨炉原子吸收光谱法 铅 茶叶 悬浮液进样 

分 类 号：TS272.7[农业科学—茶叶生产加工]