期刊论文

Li, J.-H.

中文

冶金分析

1000-7571

2010

30

9

18-22

10.13228/j.issn.1000-7571.2010.09.013

(2006180):湖南省重点学科建设项目 (2009KG23,2009KG50):衡阳市科技局支持项目 (09A32):衡阳师范学院科学研究项目

本校为第一且通讯机构

以羧基化多壁碳纳米管(c-MWCNT)修饰的碳糊电极为工作电极,建立了一种无汞测定痕量铝的新方法.在0.1 mol/L的HAc-NaAc电解液(pH5.2)中,铬蓝黑R(EBBR)在羧基化多壁碳纳米管修饰碳糊电极表面上进行阳极扫描时出现4个溶出峰,其峰电位分别为12mV,130 mV,390 mV,594 mV,加入Al3+后第二个波峰电流明显增加,其它峰电流基本不变.该峰属络合物吸附峰,利用该峰可以进行痕量铝的检测.当电位扫速为350 mV/s,富集时间为180 s时,峰电流与铝浓度在2.0×10-9~5.0×10-7mol/L的范围内呈良好线性关系,其相关系数为0.996,检出限可达1.0×10-9mol/L.该法用于铝壶水样中铝含量的测定,回收率在98%~105%之间

With carboxylic multiwalled carbon nanotubes (c-MWCNT) modified carbon paste electrode as working electrode, a new mercury-free determination method of trace aluminium was established. Eriochrome blue black R (EBBR) showed four stripping peaks on surface of c-MWCNT modified carbon paste electrode during anode scanning, such as 12 mV, 130 mV, 390 mV and 594 mV, in 0.1 mol/L HAc-NaAc eletrolyte. When Al3+ was added, the current of the second stripping peak increased remarkbly but that of other peaks kept unaltered. The second peak belonged to ads...