| 方波溶出伏安法测定蔬菜中铜和锌 |
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| 引用本文： | 马桂云,王京平,周秋华.方波溶出伏安法测定蔬菜中铜和锌[J].应用化工,2005,34(9):573-575. |
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| 作者姓名： | 马桂云 王京平 周秋华 |
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| 作者单位： | 盐城师范学院,化学系,江苏,盐城,224002 |
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| 基金项目： | 江苏省教育厅自然科学研究计划项目(04KJB150153) |
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| 摘 要： | 研究了用方波溶出伏安法测定蔬菜中铜和锌含量的方法。在pH=10的1 mol/L NH3H2O-NH4C l缓冲溶液中,于-0.12V、-0.93V(vs.SCE)分别产生铜和锌的灵敏峰,其峰高与离子的浓度在0.1~3 mg/L(Cu2+∶R2=0.9983)和0.4~5 mg/L(Zn2+∶R2=0.9924)之间存在良好的线性关系,富集时间300 s。用标准曲线法定量,分别测定蔬菜中的铜和锌。该测定方法简便快速、灵敏度高,适用于蔬菜中铜和锌含量的分析。
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| 关 键 词： | 方波溶出伏安法 蔬菜 铜 锌 |
| 文章编号： | 1671-3206(2005)09-0573-03 |
| 修稿时间： | 2005年8月4日 |
Determination of copper and zinc in vegetables by stripping square wave voltammetry |
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| MA Gui-yun,WANG Jing-ping,ZHOU Qiu-hua.Determination of copper and zinc in vegetables by stripping square wave voltammetry[J].Applied chemical industry,2005,34(9):573-575. |
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| Authors: | MA Gui-yun WANG Jing-ping ZHOU Qiu-hua |
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| Abstract: | A method for determination of copper and zinc in vegetables by stripping square wave voltammetry was presented.Optimum analytical conditions were found to be: in the presence of 1 mol/L NH_3H_2O-NH_4Cl(pH 10),the sensitive peak of Cu and Zn appeared at-0.12V and-0.93V respectively,enriched for 300 s,it has good linear relationship between peak height and concentration in the range of 0.1~3 mg/L(Cu~(2+)∶R~2=0.9983) and 0.4~5 mg/L(Zn~(2+)∶R~2=0.9924).The copper and zinc in vegetables could be quantified by calibration curve.It's a simple,quick and sensitive method. |
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| Keywords: | stripping square wave voltammetry vegetable copper zinc |
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