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

Abdolkarim Abbaspour; Anahita Izadyar

doi:10.1016/j.talanta.2006.05.085

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

Talanta. 2007 Feb 15;71(2):887-92. doi: 10.1016/j.talanta.2006.05.085. Epub 2006 Aug 1.

Authors

Abdolkarim Abbaspour¹, Anahita Izadyar

Affiliation

¹ Chemistry Department, Shiraz University, Collage of Sciences, Hafezieh, Shiraz 71454, Iran.

PMID: 19071390
DOI: 10.1016/j.talanta.2006.05.085

Abstract

This paper demonstrates the application of composite multi-walled carbon nanotube (MWNT) polyvinylchloride (MWNT-PVC) based on 1,5-diphenylcarbazide as chromium ionophore in potentiometric measurement. The sensor shows a good Nernstian slope of 19.52+/-0.40mV/decade in a wide linear range concentration of 6.3x10(-8) to 1.0x10(-2)M for Cr(NO(3))(3). The detection limit of this electrode was found to be 3.2x10(-8)M of Cr(NO(3))(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.