| 茶叶中有机硒的检测方法研究 |
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| 引用本文： | 刘铁兵,屠海云,陈美春,翁昆,郭小青,吕敏媛,张贤忠.茶叶中有机硒的检测方法研究[J].杭州应用工程技术学院学报,2013(5):373-379. |
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| 作者姓名： | 刘铁兵 屠海云 陈美春 翁昆 郭小青 吕敏媛 张贤忠 |
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| 作者单位： | [1]浙江科技学院生物与化学工程学院,杭州310023 [2]杭州市质量技术监督检测院,杭州310019 [3]中华全国供销合作总社杭州茶叶研究院,杭州310016 |
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| 基金项目： | 国家质量监督检验检疫总局、国家标准化管理委员会农业标准体系专项研究项目（2012（5））;浙江省质量技术监督系统科研计划项目（20110236） |
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| 摘 要： | 为确立茶叶中氢化物一原子荧光光谱法检测有机硒的含量，采用4＋1混合酸将茶叶中的有机硒氧化成无机硒后测定总硒含量；用1：1盐酸提取茶叶中的无机硒，并用4＋1混合酸消解，然后测定无机硒含量，再通过差减法获得有机硒的含量。结果表明，有机硒的检出限为4．89,．g／L，总硒加标回收率为86．74％～93．20oA，相对标准偏差（RSD）为0．83％～1．79％；无机硒加标回收率为81．00％～92．88％，相对标准偏差（RSD）为1．68％～2．23％。通过采用标准物质对照，偏差在合理的范围，该方法适合茶叶中有机硒和无机硒的测定。
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| 关 键 词： | 原子荧光光谱法 茶叶 有机硒 无机硒 |
Research of detection methods of organic selenium in tea |
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| LIU Tiebing^,TU Haiyun^,CHEN Meichuna^,WENG Kuna^,GUO Xiaoqing^,LYU Minyuan^,ZHANG Xianzhong.Research of detection methods of organic selenium in tea[J].Journal of Hangzhou Institute of Applied Engineering,2013(5):373-379. |
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| Authors: | LIU Tiebing^ TU Haiyun^ CHEN Meichuna^ WENG Kuna^ GUO Xiaoqing^ LYU Minyuan^ ZHANG Xianzhong |
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| Affiliation: | 1 (1. School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China; 2. Hangzhou City Institute o{ Calibration and Testing, Hangzhou 310019, China; 3. Hangzhou Tea Research Institute of China Cooperatives, Hangzhou 310020, China) |
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| Abstract: | Hydride generation atomic fluorescence spectrometry was used to detect the content of organic selenium in tea. Firstly, 4＋1 mixed acid was used to determine the total content of selenium by changing organic selenium to inorganic selenium in tea; then inorganic selenium was extracted with 1 ＂ 1 hydrochloric acid in tea, and was digested with 4-k 1 mixed acid to determine the content of inorganic selenium; finally the content of organic selenium was obtained by subtraction. The results showed that the detection limit of selenium is 4.89 /ug/L; the recovery rate of total selenium is 86.74%-93.20% by recovery experiment with detection |
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