Comparative Voltammetric Analysis of Adenine and Xanthine on a
Pencil Graphite Electrode in the Presence of Copper Ions

J 2013

Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions

NAVRÁTIL, Rudolf; Iveta PILAŘOVÁ; František JELEN a Libuše TRNKOVÁ

Základní údaje

Originální název

Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions

Autoři

NAVRÁTIL, Rudolf; Iveta PILAŘOVÁ; František JELEN a Libuše TRNKOVÁ

Vydání

Int. J. Electrochem. Sci. 2013, 1452-3981

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10403 Physical chemistry

Stát vydavatele

Srbsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.956

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/13:00068033

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000318217200004

Klíčová slova anglicky

Oxidation of purines; Pencil graphite electrode; Linear sweep voltammetry; Differential pulse voltammetry; Elimination voltammetry with linear scan

Štítky

AKR, rivok

Změněno: 7. 6. 2013 14:04, Mgr. Sylvie Dohnalíková

Anotace

V originále

This work compares voltammetric responses of adenine (Ade) and xanthine (Xan) on a pencil graphite electrode (PeGE) in the presence of copper ions. For electroanalytical monitoring linear sweep voltammetry (LSV) in connection with elimination procedure (EVLS – elimination voltammetry with linear scan), differential pulse voltammetry (DPV), and constant current potentiostatic stripping analysis (CPSA) were used. Both substances are oxidized on PeGE providing simple oxidation peaks in the absence of Cu(II) at about 0.8 V (Xan) and 1.1 V (Ade). Electrochemically produced Cu(I) ions give rise to new oxidation peaks corresponding to the oxidation of a sparingly soluble Cu(I)-purine complex at less positive potentials (~0.45 V) while the former oxidation purine peaks are increased. Compared to Ade the oxidative signal of Xan is split into two peaks depending on scan rate. Peak-counterpeak EVLS signals reflect the charge transfer processes proceeding in an adsorbed state, and this fact confirms the suggested mechanism of both electrode processes. The splitting of xanthine oxidation signal was tested by means of a potential jump from -0.15 V to 0.65 V. The effect of scan rate, pH and concentration of Cu and ligands was studied in order to evaluate not only the nature of the additional Xan oxidation peak but also to optimize the best conditions for electroanalytical determination of Ade and Xan in mixtures.

Návaznosti

MUNI/A/0992/2009, interní kód MU

Název: Vývoj metodologie a instrumentace analytické chemie pro studium složení a vlastností přírodních a syntetických materiálů (Akronym: MIA)

Investor: Masarykova univerzita, Vývoj metodologie a instrumentace analytické chemie pro studium složení a vlastností přírodních a syntetických materiálů, DO R. 2020_Kategorie A - Specifický výzkum - Studentské výzkumné projekty

Citovat

NAVRÁTIL, Rudolf; Iveta PILAŘOVÁ; František JELEN a Libuše TRNKOVÁ. Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions. Int. J. Electrochem. Sci. 2013, roč. 8, č. 4, s. 4397-4408. ISSN 1452-3981.

@article{1094599,
   author = {Navrátil, Rudolf and Pilařová, Iveta and Jelen, František and Trnková, Libuše},
   article_number = {4},
   keywords = {Oxidation of purines; Pencil graphite electrode; Linear sweep voltammetry; Differential pulse voltammetry; Elimination voltammetry with linear scan},
   language = {eng},
   issn = {1452-3981},
   journal = {Int. J. Electrochem. Sci.},
   title = {Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions},
   volume = {8},
   year = {2013}
}

TY  - JOUR
ID  - 1094599
AU  - Navrátil, Rudolf - Pilařová, Iveta - Jelen, František - Trnková, Libuše
PY  - 2013
TI  - Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions
JF  - Int. J. Electrochem. Sci.
VL  - 8
IS  - 4
SP  - 4397-4408
EP  - 4397-4408
SN  - 14523981
KW  - Oxidation of purines
KW  - Pencil graphite electrode
KW  - Linear sweep voltammetry
KW  - Differential pulse voltammetry
KW  - Elimination voltammetry with linear scan
N2  - This work compares voltammetric responses of adenine (Ade) and xanthine (Xan) on a pencil graphite electrode (PeGE) in the presence of copper ions. For electroanalytical monitoring linear sweep voltammetry (LSV) in connection with elimination procedure (EVLS – elimination voltammetry with linear scan), differential pulse voltammetry (DPV), and constant current potentiostatic stripping analysis (CPSA) were used. Both substances are oxidized on PeGE providing simple oxidation peaks in the absence of Cu(II) at about 0.8 V (Xan) and 1.1 V (Ade). Electrochemically produced Cu(I) ions give rise to new oxidation peaks corresponding to the oxidation of a sparingly soluble Cu(I)-purine complex at less positive potentials (~0.45 V) while the former oxidation purine peaks are increased. Compared to Ade the oxidative signal of Xan is split into two peaks depending on scan rate. Peak-counterpeak EVLS signals reflect the charge transfer processes proceeding in an adsorbed state, and this fact confirms the suggested mechanism of both electrode processes. The splitting of xanthine oxidation signal was tested by means of a potential jump from -0.15 V to 0.65 V. The effect of scan rate, pH and concentration of Cu and ligands was studied in order to evaluate not only the nature of the additional Xan oxidation peak but also to optimize the best conditions for electroanalytical determination of Ade and Xan in mixtures.
ER  -

NAVRÁTIL, Rudolf; Iveta PILAŘOVÁ; František JELEN a Libuše TRNKOVÁ. Comparative Voltammetric Analysis of Adenine and Xanthine on a Pencil Graphite Electrode in the Presence of Copper Ions. \textit{Int. J. Electrochem. Sci.}. 2013, roč.~8, č.~4, s.~4397-4408. ISSN~1452-3981.

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