1999
Elimination Voltammetry - Modern Electroanalytical Method for Resolution of Overlapped Voltammetric Signals
TRNKOVÁ, Libuše; Jiří FRIML a Oldřich DRAČKAZákladní údaje
Originální název
Elimination Voltammetry - Modern Electroanalytical Method for Resolution of Overlapped Voltammetric Signals
Autoři
TRNKOVÁ, Libuše (203 Česká republika, garant); Jiří FRIML (203 Česká republika) a Oldřich DRAČKA (203 Česká republika)
Vydání
I. Pardubice, Modern Electroanalytical Methods, s. 40-40, 1999
Nakladatel
Univerzita Pardubice
Další údaje
Jazyk
angličtina
Typ výsledku
Stať ve sborníku
Obor
10405 Electrochemistry
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Kód RIV
RIV/00216224:14330/99:00005899
Organizační jednotka
Fakulta informatiky
ISBN
80-7194-212-X
Klíčová slova anglicky
elimination voltammtery (EVLS);elimination of chosen currents;analytical application of EVLS;reduction processes of adenine and cytosine;transfer coefficient
Štítky
Změněno: 31. 5. 2003 14:44, RNDr. JUDr. Vladimír Šmíd, CSc.
Anotace
V originále
The elimination voltammetry with linear scan (EVLS) was used to study adenine and cytosine reduction signals at the mercury electrode. In comparison with the linear scan voltammetry providing only one unresolved peak, two elimination functions provide good resolution of individual peaks and significant increase of sensitivity. The first elimination function eliminates the kinetic current ( ) and conserves the diffusion current ( ). The second elimination function eliminates kinetic and charging currents ( and ) simultaneously and conserves the diffusion current ( ). Both functions give two well resolved peaks of adenine and cytosine in a wide concentration range, while the linear sweep voltammetry gives badly resolved peaks due to the hydrogen evolution. The best resolution of peaks is observed in acetate buffer at pH 3.8 and a detection limit for both substances is 500 nM. The concentration dependence of EVLS peak heights for one substance at the constant concentration of the other substance is linear. The peak potentials differ in these elimination functions. The difference in EVLS peak potentials gives the possibility to evaluate . The elimination voltammetry with linear scan contributes to the resolution of cathodic signals of purine and pyrimidine bases at very negative potentials near supporting electrolyte discharge.
Návaznosti
| GA511/95/1279, projekt VaV |
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| GV204/97/K084, projekt VaV |
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| MSM 143100008, záměr |
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| MSM 143100011, záměr |
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