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Reusable platinum nanoparticle modified boron doped diamond microelectrodes for oxidative determination of arsenite.
Anal Chem. 2007 Jan 15; 79(2):500-7.AC

Abstract

Boron doped diamond (BDD) macro- and microelectrodes were modified by electrodeposition of platinum nanoparticles using a multipotential step electrodeposition technique and used for the oxidative determination of arsenite, As(III). The formation of Pt nanoparticles was evident from cyclic voltammetry measurement, whereas AFM and SEM revealed the size and size distribution of deposited Pt nanoparticles. Raman spectroscopy illustrated a correlation between the typical BDD signature and the number of platinum deposition cycles. Linear sweep voltammetry performed with the modified BDD microelectrode outperformed its macrocounterpart and resulted in very low detecting currents with enhanced signal-to-noise ratios. With linearity up to 100 ppb and a detection limit of 0.5 ppb, the electrochemical system was applicable for processing tap and river water samples. Over 150 repetitive runs could be performed, and electrochemical etching of platinum allowed the reuse of the BDD microelectrode. The presence of copper and chloride ions, the two most severe interferents at levels commonly found in groundwater, did not interfere with the assay.

Authors+Show Affiliations

Biotechnology Research Institute, National Research Council Canada, Montreal, Quebec, Canada.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17222013

Citation

Hrapovic, Sabahudin, et al. "Reusable Platinum Nanoparticle Modified Boron Doped Diamond Microelectrodes for Oxidative Determination of Arsenite." Analytical Chemistry, vol. 79, no. 2, 2007, pp. 500-7.
Hrapovic S, Liu Y, Luong JH. Reusable platinum nanoparticle modified boron doped diamond microelectrodes for oxidative determination of arsenite. Anal Chem. 2007;79(2):500-7.
Hrapovic, S., Liu, Y., & Luong, J. H. (2007). Reusable platinum nanoparticle modified boron doped diamond microelectrodes for oxidative determination of arsenite. Analytical Chemistry, 79(2), 500-7.
Hrapovic S, Liu Y, Luong JH. Reusable Platinum Nanoparticle Modified Boron Doped Diamond Microelectrodes for Oxidative Determination of Arsenite. Anal Chem. 2007 Jan 15;79(2):500-7. PubMed PMID: 17222013.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reusable platinum nanoparticle modified boron doped diamond microelectrodes for oxidative determination of arsenite. AU - Hrapovic,Sabahudin, AU - Liu,Yali, AU - Luong,John H T, PY - 2007/1/16/pubmed PY - 2007/3/23/medline PY - 2007/1/16/entrez SP - 500 EP - 7 JF - Analytical chemistry JO - Anal Chem VL - 79 IS - 2 N2 - Boron doped diamond (BDD) macro- and microelectrodes were modified by electrodeposition of platinum nanoparticles using a multipotential step electrodeposition technique and used for the oxidative determination of arsenite, As(III). The formation of Pt nanoparticles was evident from cyclic voltammetry measurement, whereas AFM and SEM revealed the size and size distribution of deposited Pt nanoparticles. Raman spectroscopy illustrated a correlation between the typical BDD signature and the number of platinum deposition cycles. Linear sweep voltammetry performed with the modified BDD microelectrode outperformed its macrocounterpart and resulted in very low detecting currents with enhanced signal-to-noise ratios. With linearity up to 100 ppb and a detection limit of 0.5 ppb, the electrochemical system was applicable for processing tap and river water samples. Over 150 repetitive runs could be performed, and electrochemical etching of platinum allowed the reuse of the BDD microelectrode. The presence of copper and chloride ions, the two most severe interferents at levels commonly found in groundwater, did not interfere with the assay. SN - 0003-2700 UR - https://www.unboundmedicine.com/medline/citation/17222013/Reusable_platinum_nanoparticle_modified_boron_doped_diamond_microelectrodes_for_oxidative_determination_of_arsenite_ L2 - https://doi.org/10.1021/ac061528a DB - PRIME DP - Unbound Medicine ER -