TY - JOUR
T1 - Modification of Gold Nanoparticles at Carbon Electrodes and the Applications for Arsenic (III) Detections
AU - Ivandini, Tribidasari Anggraningrum
AU - Wijaya, Lany
AU - Gunlazuardi, Jarnuzi
AU - Einaga, Yasuaki
PY - 2012
Y1 - 2012
N2 - Modification of carbon, including boron-doped diamond (BDD) and glassy carbon (GC), using gold nanoparticle (AuNP) was developed by self-assembly technique. This technique is based on electrostatic interaction between citrate- capped AuNP to amine terminal groups after surface modification of BDD and GC. The fabricated materials, AuNP-BDD and AuNP-GC, were then utilized as electrodes for As3+ detection using anodic stripping voltammetry (ASV) technique. Anodic stripping voltammograms of both AuNP-BDD and AuNP-GC electrodes showed similar peak potentials of As° oxidation at ~0.21 V (vs. Ag/AgCl) in optimum conditions of -500 mV, 180 s, and 100 mV/s for deposition potential, deposition time, and scan rate, respectively. AuNP-BDD shows better performances in the case of wide linear concentration range (0-20 mM) and low limit of detection (0.39 mM or 4.64 ppb), whereas those of AuNP-GC were linear in the concentration range of 0-10mM with a detection limit of 0.14 mM (13.12 ppb). Excellent reproducibility was shown with RSDs (n=20) of 2.93% and 4.54% at AuNP-BDD and AuNP-GC, respectively. However, decreasing of current responses in 6-concecutive days was found more at AuNP-BDD (~20.1%) than that at AuNP-GC (~2.8%).
AB - Modification of carbon, including boron-doped diamond (BDD) and glassy carbon (GC), using gold nanoparticle (AuNP) was developed by self-assembly technique. This technique is based on electrostatic interaction between citrate- capped AuNP to amine terminal groups after surface modification of BDD and GC. The fabricated materials, AuNP-BDD and AuNP-GC, were then utilized as electrodes for As3+ detection using anodic stripping voltammetry (ASV) technique. Anodic stripping voltammograms of both AuNP-BDD and AuNP-GC electrodes showed similar peak potentials of As° oxidation at ~0.21 V (vs. Ag/AgCl) in optimum conditions of -500 mV, 180 s, and 100 mV/s for deposition potential, deposition time, and scan rate, respectively. AuNP-BDD shows better performances in the case of wide linear concentration range (0-20 mM) and low limit of detection (0.39 mM or 4.64 ppb), whereas those of AuNP-GC were linear in the concentration range of 0-10mM with a detection limit of 0.14 mM (13.12 ppb). Excellent reproducibility was shown with RSDs (n=20) of 2.93% and 4.54% at AuNP-BDD and AuNP-GC, respectively. However, decreasing of current responses in 6-concecutive days was found more at AuNP-BDD (~20.1%) than that at AuNP-GC (~2.8%).
UR - http://journal.ui.ac.id/index.php/science/article/view/1274
U2 - 10.7454/mss.v16i1.1274
DO - 10.7454/mss.v16i1.1274
M3 - Article
SN - 2356-0851
VL - 16
JO - Makara Journal of Science
JF - Makara Journal of Science
IS - 1
ER -