Bismuth-modified hydroxyapatite carbon electrode for heavy metal detection in biomatrices
Micro-analytical based sensors with complex biomatrices such as blood, urine, or saliva are of increasing interest in health-care sector because of their sensitivity, selectively and simplicity. A modified carbon electrode with hydroxyapatite (HAp) and Bismuth (II) was developed to detect Pb2+ conce...
| Main Authors: | Ajab, H., Khan, A.A.A., Dennis, J.O., Abdullah, M.A. |
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| Format: | Article |
| Institution: | Universiti Teknologi Petronas |
| Record Id / ISBN-0: | utp-eprints.31999 / |
| Published: |
Trans Tech Publications Ltd
2014
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| Online Access: |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84914104721&doi=10.4028%2fwww.scientific.net%2fAMM.625.813&partnerID=40&md5=e67396e5f831392acb71d85463c26760 http://eprints.utp.edu.my/31999/ |
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| Summary: |
Micro-analytical based sensors with complex biomatrices such as blood, urine, or saliva are of increasing interest in health-care sector because of their sensitivity, selectively and simplicity. A modified carbon electrode with hydroxyapatite (HAp) and Bismuth (II) was developed to detect Pb2+ concentration in blood sera from healthy persons. Square wave anodic stripping voltammetry was used for the detection of Pb2+ by the interacting capability of the Bi film and HAp on the electrode surface with the optimised parameters of deposition time 240sec, deposition potential �1.0 V in 0.1M acetate buffer followed by square wave potential scan from -1.0 V to -0.2V. Bi film deposited HAp-CME showed attractive electrochemical characteristics with high sensitivity for Pb2+. Clear current peaks for different Pb2+ concentrations were observed around -0.55V, with favourable signal-to-background ratio, and comparatively free from oxygen interferences. © 2014 Trans Tech Publications, Switzerland. |
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