Carbon nanotube composite coated platinum electrode for detection of Cr(III) in real samples

被引：47

作者：

Abbaspour, Abdolkarim ^{[1
]}

Izadyar, Anahita ^{[1
]}

机构：

[1] Shiraz Univ, Dept Chem, Coll Sci, Shiraz 71454, Iran

来源：

TALANTA | 2007年 / 71卷 / 02期

关键词：

multi-walled carbon nanotube (MWNT); PVC; carbon composite coated platinum electrode; Cr(III); 1,5-diphenylcarbazide; natural waters; multivitamin;

D O I：

10.1016/j.talanta.2006.05.085

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper demonstrates the application of composite multi-walled carbon nanotube (MWNT) polyvinylchloride (MWNT-PVC) based on 1,5diphenylcarbazide as chromium ionophore in potentiometric measurement. The sensor shows a good Nernstian slope of 19.52 +/- 0.40 mV/decade in a wide linear range concentration of 6.3 x 10(-8) to 1.0 X 10(-2) M for Cr(NO3)(3). The detection limit of this electrode was found to be 3.2 x 10(-8) M of Cr(NO3)(3) and is applicable in a pH range of 3.0-6.8. It has a short response time of about 10s. This chromium electrode has a good selectivity over 16 various metal ions. The practical analytical utility of this electrode was demonstrated by measurement of Cr(III) in drinking water and mineral water samples without any serious preliminary pre-treatment and chromium in multivitamin. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：887 / 892

页数：6

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