| 微波消解-溶出伏安法对食品中铜、铅、镉的同时测定 |
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| 引用本文： | 赖瑢,丘福保,徐镇耿,欧阳钢锋,朱芳.微波消解-溶出伏安法对食品中铜、铅、镉的同时测定[J].分析测试学报,2010,29(2). |
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| 作者姓名： | 赖瑢 丘福保 徐镇耿 欧阳钢锋 朱芳 |
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| 作者单位： | 中山大学,化学与化学工程学院,广东,广州,510275 |
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| 基金项目： | 广东省自然科学基金资助项目 |
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| 摘 要： | 采用微波消解结合同位镀汞阳极溶出伏安法对茶叶、紫菜和西洋菜等食品中的铜、铅、镉进行了测定,并优化了微波消解、电解缓冲液、富集电位等实验条件。采用标准加入法定量,Cu、Pb、Cd的线性范围分别为0.040~1.768、0.080~1.768、0.040~1.768 mg/L,相关系数分别为0.998 4、0.998 2、0.997 0,检出限分别为0.008、0.016、0.008 mg/L,相对标准偏差(n=5)分别为4.1%、0.92%、2.0%。该方法测定茶叶、紫菜、西洋菜等实际样品的铜、铅、镉含量,加标回收率分别为98%~109%、94%~103%、100%~112%;将测定结果与原子吸收光谱法检测结果对比,表明此方法简便、快速,且具有较高的灵敏度、较好的选择性和可靠性。
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| 关 键 词： | 微波消解 溶出伏安法 食品 铜 铅 镉 |
Determination of Copper,Lead and Cadmium in Food by Microwave Digestion-Anodic Stripping Voltammetry |
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| LAI Rong,QIU Fu-bao,XU Zhen-geng,OUYANG Gang-feng,ZHU Fang.Determination of Copper,Lead and Cadmium in Food by Microwave Digestion-Anodic Stripping Voltammetry[J].Journal of Instrumental Analysis,2010,29(2). |
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| Authors: | LAI Rong QIU Fu-bao XU Zhen-geng OUYANG Gang-feng ZHU Fang |
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| Institution: | LAI Rong,QIU Fu-bao,XU Zhen-geng,OUYANG Gang-feng,ZHU Fang(School of Chemistry , Chemical Engineering,Sun Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | A method for the determination of Cd,Pb,Cu in food by mircrowave digestion(MWD) method as pretreatment procedures combined with anodic stripping voltammetry(ASV) using a rotating glassy carbon/mercury film electrode was proposed.A series of experimental conditions,such as the pressure and temperature of microwave digestion,pH of the buffer solution and deposition potential,were optimized.Under the optimal conditions,the linear ranges of Cu,Pb and Cd were 0.040-1.768,0.080-1.768 and 0.040-1.768 mg/L,respecti... |
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| Keywords: | microwave digestion(MWD) anodic stripping voltammetry(ASV) food copper lead cadmium |
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