Electrochemical study and determination of all-trans-retinol at carbon paste electrode modified by a surfactant

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912540" target="_blank" >RIV/00216275:25310/18:39912540 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ftb.com.hr/images/pdfarticles/2018/July-September/FTB-56-337.pdf" target="_blank" >http://www.ftb.com.hr/images/pdfarticles/2018/July-September/FTB-56-337.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17113/ftb.56.03.18.5618" target="_blank" >10.17113/ftb.56.03.18.5618</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical study and determination of all-trans-retinol at carbon paste electrode modified by a surfactant

Popis výsledku v původním jazyce

The oxidation mechanism of all-trans-retinol (vitamin A,) and its several esters in non-aqueous, aqueous organic mixture, and pure aqueous media was investigated by cyclic voltammetry.The oxidation occurred in several irreversible steps. The calculated highest density of electrons in retinoid molecules which are delocalized over carbon atoms of the five conjugated double bonds (C5-C14) was found in the part of the molecule involved in oxidation processes. The most sensitive oxidation peak (at +0.8 V vs. Ag/AgCl) was used for development of new direct voltammetric method based on differential pulse voltammetry for the determination of retinol at carbon paste electrode modified with surfactant sodium dodecyl sulfate (CPE/SDS). The results show that 30 % (by mass) of modifier SDS exhibited optimal sensitivity and shape of voltammograms. Compared to commonly used glassy carbon electrode (GCE),the CPE/SDS showed significant progress in the retinol electroanalysis.The linear ranges for retinol determination were 1.5.10(-6)-1.8.10(-4) M for CPE/SDS and 4.4.10(-6)-7.0.10(-4) M for GCE with the detection limits of 1.3.10(-6) and 4.6.10(-7) M, respectively.

Název v anglickém jazyce

Electrochemical study and determination of all-trans-retinol at carbon paste electrode modified by a surfactant

Popis výsledku anglicky

The oxidation mechanism of all-trans-retinol (vitamin A,) and its several esters in non-aqueous, aqueous organic mixture, and pure aqueous media was investigated by cyclic voltammetry.The oxidation occurred in several irreversible steps. The calculated highest density of electrons in retinoid molecules which are delocalized over carbon atoms of the five conjugated double bonds (C5-C14) was found in the part of the molecule involved in oxidation processes. The most sensitive oxidation peak (at +0.8 V vs. Ag/AgCl) was used for development of new direct voltammetric method based on differential pulse voltammetry for the determination of retinol at carbon paste electrode modified with surfactant sodium dodecyl sulfate (CPE/SDS). The results show that 30 % (by mass) of modifier SDS exhibited optimal sensitivity and shape of voltammograms. Compared to commonly used glassy carbon electrode (GCE),the CPE/SDS showed significant progress in the retinol electroanalysis.The linear ranges for retinol determination were 1.5.10(-6)-1.8.10(-4) M for CPE/SDS and 4.4.10(-6)-7.0.10(-4) M for GCE with the detection limits of 1.3.10(-6) and 4.6.10(-7) M, respectively.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Food Technology and Biotechnology

ISSN

1330-9862

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

7

Strana od-do

337-343

Kód UT WoS článku

000448026200004

EID výsledku v databázi Scopus

2-s2.0-85055701343