Abstract
Electrochemical detection of Se (IV) and (VI) was investigated at gold-modified boron-doped diamond electrodes. Cyclic voltammetry in acid condition showed that the onset of current flows of Se (IV) and Se (VI) occurred at almost similar potentials. Furthermore, the currents at the peak potential of ∼0.9 V (vs. Ag/AgCl) showed high linearity against concentrations of both Se (IV) and Se (VI) with estimated limits of detection (S/N = 3) of 20 and 50 ppb, respectively. However, whereas oxidation peaks of Se (IV) and Se (VI) can be observed in acid and neutral pH, only oxidation peak of Se (IV) appeared in high pH. The possibility to differentiate a mixture of Se (IV) and Se (VI) by applying cyclic voltammogram (CV) at acidic and basic conditions was discussed, and it was promising, especially because, previously, it always stated that Se (VI) was not electrochemically active.
| Original language | English |
|---|---|
| Pages (from-to) | 367-374 |
| Number of pages | 8 |
| Journal | Electrocatalysis |
| Volume | 4 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2013 |
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Keywords
- Cyclic voltammetry
- Gold-modified boron-doped diamond electrodes
- Selenium (IV) and (VI)
- Speciation
ASJC Scopus subject areas
- Electrochemistry
Cite this
Electrochemical Detection of Selenium (IV) and (VI) at Gold-Modified Diamond Electrodes. / Ivandini, Tribidasari A.; Einaga, Yasuaki.
In: Electrocatalysis, Vol. 4, No. 4, 2013, p. 367-374.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrochemical Detection of Selenium (IV) and (VI) at Gold-Modified Diamond Electrodes
AU - Ivandini, Tribidasari A.
AU - Einaga, Yasuaki
PY - 2013
Y1 - 2013
N2 - Electrochemical detection of Se (IV) and (VI) was investigated at gold-modified boron-doped diamond electrodes. Cyclic voltammetry in acid condition showed that the onset of current flows of Se (IV) and Se (VI) occurred at almost similar potentials. Furthermore, the currents at the peak potential of ∼0.9 V (vs. Ag/AgCl) showed high linearity against concentrations of both Se (IV) and Se (VI) with estimated limits of detection (S/N = 3) of 20 and 50 ppb, respectively. However, whereas oxidation peaks of Se (IV) and Se (VI) can be observed in acid and neutral pH, only oxidation peak of Se (IV) appeared in high pH. The possibility to differentiate a mixture of Se (IV) and Se (VI) by applying cyclic voltammogram (CV) at acidic and basic conditions was discussed, and it was promising, especially because, previously, it always stated that Se (VI) was not electrochemically active.
AB - Electrochemical detection of Se (IV) and (VI) was investigated at gold-modified boron-doped diamond electrodes. Cyclic voltammetry in acid condition showed that the onset of current flows of Se (IV) and Se (VI) occurred at almost similar potentials. Furthermore, the currents at the peak potential of ∼0.9 V (vs. Ag/AgCl) showed high linearity against concentrations of both Se (IV) and Se (VI) with estimated limits of detection (S/N = 3) of 20 and 50 ppb, respectively. However, whereas oxidation peaks of Se (IV) and Se (VI) can be observed in acid and neutral pH, only oxidation peak of Se (IV) appeared in high pH. The possibility to differentiate a mixture of Se (IV) and Se (VI) by applying cyclic voltammogram (CV) at acidic and basic conditions was discussed, and it was promising, especially because, previously, it always stated that Se (VI) was not electrochemically active.
KW - Cyclic voltammetry
KW - Gold-modified boron-doped diamond electrodes
KW - Selenium (IV) and (VI)
KW - Speciation
UR - http://www.scopus.com/inward/record.url?scp=84890354067&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84890354067&partnerID=8YFLogxK
U2 - 10.1007/s12678-013-0169-7
DO - 10.1007/s12678-013-0169-7
M3 - Article
AN - SCOPUS:84890354067
VL - 4
SP - 367
EP - 374
JO - Electrocatalysis
JF - Electrocatalysis
SN - 1868-2529
IS - 4
ER -