| 茶水中微量铅的测定 |
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| 引用本文： | 韩俊凤,董维广,赵平平,贾林艳,庄志萍,蔡雪. 茶水中微量铅的测定[J]. 食品研究与开发, 2012, 0(6): 153-154,188 |
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| 作者姓名： | 韩俊凤 董维广 赵平平 贾林艳 庄志萍 蔡雪 |
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| 作者单位： | 牡丹江师范学院化学化工学院 |
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| 基金项目： | 牡丹江师范学院科学技术研究项目(QY201106),牡丹江师范学院大学生实践创新项目(2011xscx012) |
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| 摘 要： | 采用阳极溶出伏安法测定茶水中的铅含量,并对测定条件进行优化。结果表明以醋酸-醋酸钠为支持电解质,铅的溶出峰电位为-0.536 V,线性范围为10μg/L~380μg/L,线性方程为Ip=0.238 1c-1.038 9(r=0.999 0),检出限为2.52μg/L。以该方法测定样品的相对标准偏差小于3%,回收率达到92.5%~104.2%。
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| 关 键 词： | 铅 阳极溶出伏安法 茶水 |
Determination of Trace Lead in Tea |
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| HAN Jun-feng,DONG Wei-guang,ZHAO Ping-ping,JIA Lin-yan,ZHUANG Zhi-ping,CAI Xue. Determination of Trace Lead in Tea[J]. Food Research and Developent, 2012, 0(6): 153-154,188 |
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| Authors: | HAN Jun-feng DONG Wei-guang ZHAO Ping-ping JIA Lin-yan ZHUANG Zhi-ping CAI Xue |
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| Affiliation: | (Department of Chemistry and Chemical Engineering,MuDanJiang Teachers College,Mudanjiang 157000,Heilongjiang,China) |
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| Abstract: | Determination of lead in tea was studied by anodic stripping voltammetry,and several detection conditions were optimized.Results showed that the peak potential of Pb was-0.536 V with HAc-NaAc as the supporting electrolyte.The calibration curve was linear in the range of 10 μg/L-380 μg/L,the linear equation was Ip=0.238 1c-1.038 9 with regression coefficient of 0.999 0,and the detection limit was 2.52 μg/L.In this way the relative standard deviation was less than 3 %,and the recoveries were among 92.5 % to 104.2 %. |
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| Keywords: | lead anodic stripping voltammetry tea |
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