TY - JOUR
T1 - Development of amperometric arsine gas sensor using gold-modified diamond electrodes
AU - Ivandini, Tribidasari A.
AU - Yamada, Daisuke
AU - Watanabe, Takeshi
AU - Matsuura, Hiroaki
AU - Nakano, Nabuo
AU - Fujishima, Akira
AU - Einaga, Yasuaki
N1 - Funding Information:
This work was supported by New Energy and Industrial Technology Development Organization (NEDO) and Kanagawa Academy of Science and Technology (KAST).
PY - 2010/6/15
Y1 - 2010/6/15
N2 - Amperometric gas sensor of arsine was developed using gold-modified diamond electrodes as the working electrodes. The detection method was conducted in high concentration of H2SO4. The reaction was declared based on two oxidation steps, involving oxidation of As3- to As 0 at mild potential in strong acid, followed by electrochemical oxidation of As0 to As3+ at gold-based electrodes. Linear calibration curve was observed in the concentration range of 5-50 ppb (r 2 = 0.985) with detection limit of ∼4.43 ppb (S/N = 3). Current decreasing of measurement was found ∼5.5% for 5 measurements. However, better stability was observed after the 5th measurement, indicated that the sensor could be applied for long time measurement. Investigation to several possible interference gasses, i.e. SO2, H2S, NO, NO 2, CO, O3 and H2 indicated no significant interference of the gas to arsine measurements.
AB - Amperometric gas sensor of arsine was developed using gold-modified diamond electrodes as the working electrodes. The detection method was conducted in high concentration of H2SO4. The reaction was declared based on two oxidation steps, involving oxidation of As3- to As 0 at mild potential in strong acid, followed by electrochemical oxidation of As0 to As3+ at gold-based electrodes. Linear calibration curve was observed in the concentration range of 5-50 ppb (r 2 = 0.985) with detection limit of ∼4.43 ppb (S/N = 3). Current decreasing of measurement was found ∼5.5% for 5 measurements. However, better stability was observed after the 5th measurement, indicated that the sensor could be applied for long time measurement. Investigation to several possible interference gasses, i.e. SO2, H2S, NO, NO 2, CO, O3 and H2 indicated no significant interference of the gas to arsine measurements.
KW - Amperometric detection
KW - Arsine
KW - Diamond electrodes
KW - Electrochemical analysis
KW - Gas sensor
KW - Gold-modified
UR - http://www.scopus.com/inward/record.url?scp=77955276752&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2010.04.012
DO - 10.1016/j.jelechem.2010.04.012
M3 - Article
AN - SCOPUS:77955276752
SN - 1572-6657
VL - 645
SP - 58
EP - 63
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1
ER -