| Nafion-碳纳米管修饰电极溶出伏安法测定大米中痕量铅 |
| |
| 引用本文： | 翁芝莹,刘国艳,张洪才,商璟,柴春彦. Nafion-碳纳米管修饰电极溶出伏安法测定大米中痕量铅[J]. 食品科技, 2011, 0(7): 294-297 |
| |
| 作者姓名： | 翁芝莹 刘国艳 张洪才 商璟 柴春彦 |
| |
| 作者单位： | 上海交通大学农业与生物学院; |
| |
| 摘 要： | 用Nafion和碳纳米管联合修饰玻碳电极,探讨铅离子在修饰电极上的溶出伏安行为。建立了基于化学修饰电极检测大米中铅的溶出伏安电化学传感方法。实验结果表明,在pH值4.0、0.1mol/L醋酸-醋酸盐溶液的缓冲体系,富集电位-0.6V,富集时间180s,铅离子浓度在0.01～1mg/L范围内与溶出峰电流呈现良好的线性关系,检测限可达5μg/L,达到大米卫生标准。该方法操作简便,检测时间不超过5min,适合大批量大米样品检测,具有很好的准确性、灵敏度和稳定性。为进一步研究重金属现场快速检测奠定良好的实验基础。
|
| 关 键 词： | Nafion 碳纳米管 铅 溶出伏安法 大米 |
Determination of lead in rice based on nafion and multiwalled carbon nanotube modified glass carbon electrode with techniques |
| |
| WENG Zhi-ying,LIU Guo-yan,ZHANG Hong-cai,SHANG Jing,CHAI Chun-yan. Determination of lead in rice based on nafion and multiwalled carbon nanotube modified glass carbon electrode with techniques[J]. Food Science and Technology, 2011, 0(7): 294-297 |
| |
| Authors: | WENG Zhi-ying LIU Guo-yan ZHANG Hong-cai SHANG Jing CHAI Chun-yan |
| |
| Affiliation: | WENG Zhi-ying,LIU Guo-yan,ZHANG Hong-cai,SHANG Jing,CHAI Chun-yan*(School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240) |
| |
| Abstract: | A new method based on Nafion and multiwalled carbon nanotube(MWCNT) modified glass carbon electrode(GCE) has been established for rapid detection of lead in rice sample.The electrochemical behavior of lead on the modified GCE was investigated and the sensor signal was recorded using stripping voltammetry.The results showed that under the optimized conditions including 0.1 mol/L NaAc-HAc usded as surporting buffer(pH4.0),-0.6 V of accumulating potential,180 s of accumulating time,an excellent linear sensor r... |
| |
| Keywords: | Nafion multiwalled carbon nanotube lead stripping voltammetry rice |
| 本文献已被 CNKI 等数据库收录！ |
|
