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Bismuth-Modified Hydroxyapatite Carbon Electrode for Heavy Metal Detection in Biomatrices
Ist Teil von
Applied Mechanics and Materials, 2014-09, Vol.625 (Process and Advanced Materials Engineering), p.813-817
Ort / Verlag
Zurich: Trans Tech Publications Ltd
Erscheinungsjahr
2014
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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.