Determination of vitamin E in margarines and edible oils using square wave anodic stripping voltammetry with a glassy carbon paste electrode

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39910443" target="_blank" >RIV/00216275:25310/17:39910443 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.foodchem.2017.02.068" target="_blank" >http://dx.doi.org/10.1016/j.foodchem.2017.02.068</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.foodchem.2017.02.068" target="_blank" >10.1016/j.foodchem.2017.02.068</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of vitamin E in margarines and edible oils using square wave anodic stripping voltammetry with a glassy carbon paste electrode

Popis výsledku v původním jazyce

A new electroanalytical method for determination of vitamin E in the form of the total content of tocopherols present in margarines and edible oils has been developed. The method is based on extraction of these biologically active compounds into silicone oil, acting as lipophilic binder of glassy carbon paste electrode, with subsequent electrochemical detection by square wave anodic stripping voltammetry (SWASV) in 0.1 M HNO3. The values of vitamin E contents were expressed as mass equivalent of alpha-tocopherol known as the most active form of this lipophilic vitamin. The linear ranges for alpha-tocopherol determination were 5 x 10(-7)-4 x 10(-5) and 5 x 10(-8)-1 x 10(-5) mol L-1 with the detection limits of 1 x 10(-7) and 3.3 x 10(-9) mol L-1 for 5 and 15 min accumulation, respectively. The results have shown that SWASV with extraction step is very sensitive method for the determination of vitamin E, being comparable to reversed-phase high performance liquid chromatography chosen as reference method.

Název v anglickém jazyce

Determination of vitamin E in margarines and edible oils using square wave anodic stripping voltammetry with a glassy carbon paste electrode

Popis výsledku anglicky

A new electroanalytical method for determination of vitamin E in the form of the total content of tocopherols present in margarines and edible oils has been developed. The method is based on extraction of these biologically active compounds into silicone oil, acting as lipophilic binder of glassy carbon paste electrode, with subsequent electrochemical detection by square wave anodic stripping voltammetry (SWASV) in 0.1 M HNO3. The values of vitamin E contents were expressed as mass equivalent of alpha-tocopherol known as the most active form of this lipophilic vitamin. The linear ranges for alpha-tocopherol determination were 5 x 10(-7)-4 x 10(-5) and 5 x 10(-8)-1 x 10(-5) mol L-1 with the detection limits of 1 x 10(-7) and 3.3 x 10(-9) mol L-1 for 5 and 15 min accumulation, respectively. The results have shown that SWASV with extraction step is very sensitive method for the determination of vitamin E, being comparable to reversed-phase high performance liquid chromatography chosen as reference method.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10406 - Analytical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Food Chemistry

ISSN

0308-8146

e-ISSN

—

Svazek periodika

229

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

621-627

Kód UT WoS článku

000400033000079

EID výsledku v databázi Scopus

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