| 摘要: |
| 用树状分子及炭黑纳米复合材料修饰玻碳电极，并对六价铬Cr（VI）进行电化学测定.采用X射线光电子能谱（XPS）、循环伏安法（CV）、交流阻抗法（EIS）、方波溶出伏安法（SWSV）等方法对修饰电极进行了表征.研究发现多种其他离子如Ni2+、Co2+、Pb2+、Cu2+、Cd2+、NO3-、SO42-、Cl-等对六价铬离子的测定没有明显干扰，且Cr（VI）的还原峰电流与Cr（VI）的物质的量浓度在4~60 nmol/L和0.06~500 μmol/L范围内呈线性关系，检测限达1 nmol/L.该法具有简便快速，选择性好，线性范围宽，灵敏度高等优点. |
| 关键词: 六价铬Cr（VI） 炭黑 树状分子 电化学 修饰电极 |
| DOI：10.3969/J.ISSN.100-5137.2017.02.017 |
| 分类号: |
| 基金项目:上海师范大学食品安全与营养创新团队（DXL123） |
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| Electrochemical detection of Cr (VI) based on polyamidoamine and carbon black composite nano materials modified electrode |
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Liu Pan, Ding Lingling, Peng Yaoshan, Zhu Ningning
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College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| This study described a simple and rapid method for the electrochemical determination of Cr (VI) by using polyamidoamine and carbon black composite nano materials modified glassy carbon electrode (GCE) (written as PAMAM/CB/GCE).PAMAM/CB/GCE was characterized by XPS,CV,EIS,and SWSV.It was found that many other ions such as Ni2+,Co2+,Pb2+,Cu2+,CdNO3-,SO42-,and Cl- had no influence on Cr (VI) determination.Under the optimal conditions,the reduction current of Cr (VI) increased linearly with increased mole concentration of Cr (VI) in the range of 4~60 nmol/L and 0.06~500 μmol/L.The detection limit was 1 nmol/L (based on S/N = 3).The present method has some advantages such as simplicity,rapidness,good selectivity,wide linear range,and high sensitivity. |
| Key words: Cr (VI) carbon black polyamidoamine electrochemical modified electrode |
