Abstract
Conditions are established for quantitative electrochemical generation of cobalt (III) at a glassy carbon working electrode in anhydrous acetic acid in the presence of potassium acetate, sodium acetate or sodium perchlorate. In anhydrous alkali-metal acetate solutions cobalt (III) is as stable as in the presence of acetic anhydride. The concentration of cobalt(III) in the solution is considerably decreased in the presence of small amounts of water. This phenomenon is much more pronounced in sodium perchlorate supporting electrolyte. Coulometric titration methods for the determination of hydroquinone, 2-methylhydroquinone and ascorbic acid with the generated oxidant have been developed. The errors of the determinations are less than ±2%.
| Original language | English |
|---|---|
| Pages (from-to) | 153-160 |
| Number of pages | 8 |
| Journal | Mikrochimica Acta |
| Volume | 117 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 1 Sep 1995 |
| Externally published | Yes |
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Keywords
- acetic acid
- cobalt(III)
- coulometric titration
- electrochemical generation
- glassy carbon
ASJC Scopus subject areas
- Analytical Chemistry
Cite this
Quantitative anodic generation of cobalt (III) at glassy carbon in acetic acid. Coulometric titrations with the generated reagent. / Pastor, Tibor J.; Antonijević, Vojka V.; Barek, Jiři.
In: Mikrochimica Acta, Vol. 117, No. 3-4, 01.09.1995, p. 153-160.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantitative anodic generation of cobalt (III) at glassy carbon in acetic acid. Coulometric titrations with the generated reagent
AU - Pastor, Tibor J.
AU - Antonijević, Vojka V.
AU - Barek, Jiři
PY - 1995/9/1
Y1 - 1995/9/1
N2 - Conditions are established for quantitative electrochemical generation of cobalt (III) at a glassy carbon working electrode in anhydrous acetic acid in the presence of potassium acetate, sodium acetate or sodium perchlorate. In anhydrous alkali-metal acetate solutions cobalt (III) is as stable as in the presence of acetic anhydride. The concentration of cobalt(III) in the solution is considerably decreased in the presence of small amounts of water. This phenomenon is much more pronounced in sodium perchlorate supporting electrolyte. Coulometric titration methods for the determination of hydroquinone, 2-methylhydroquinone and ascorbic acid with the generated oxidant have been developed. The errors of the determinations are less than ±2%.
AB - Conditions are established for quantitative electrochemical generation of cobalt (III) at a glassy carbon working electrode in anhydrous acetic acid in the presence of potassium acetate, sodium acetate or sodium perchlorate. In anhydrous alkali-metal acetate solutions cobalt (III) is as stable as in the presence of acetic anhydride. The concentration of cobalt(III) in the solution is considerably decreased in the presence of small amounts of water. This phenomenon is much more pronounced in sodium perchlorate supporting electrolyte. Coulometric titration methods for the determination of hydroquinone, 2-methylhydroquinone and ascorbic acid with the generated oxidant have been developed. The errors of the determinations are less than ±2%.
KW - acetic acid
KW - cobalt(III)
KW - coulometric titration
KW - electrochemical generation
KW - glassy carbon
UR - http://www.scopus.com/inward/record.url?scp=0344712194&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0344712194&partnerID=8YFLogxK
U2 - 10.1007/BF01244886
DO - 10.1007/BF01244886
M3 - Article
AN - SCOPUS:0344712194
VL - 117
SP - 153
EP - 160
JO - Mikrochimica Acta
JF - Mikrochimica Acta
SN - 0026-3672
IS - 3-4
ER -