Voltammetric determination of ethylvanillin and methylvanillin sum at carbon paste electrode modified by sodium dodecyl sulfate in selected foodstuffs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39912545" target="_blank" >RIV/00216275:25310/18:39912545 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/content/pdf/10.1007%2Fs00706-018-2266-z.pdf" target="_blank" >https://link.springer.com/content/pdf/10.1007%2Fs00706-018-2266-z.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00706-018-2266-z" target="_blank" >10.1007/s00706-018-2266-z</a>

Result language

angličtina

Original language name

Voltammetric determination of ethylvanillin and methylvanillin sum at carbon paste electrode modified by sodium dodecyl sulfate in selected foodstuffs

Original language description

A new voltammetric method without using high cost and health risk nanomaterials has been developed for quantitative determination of ethylvanillin and methylvanillin sum, compounds that are used as food additives. The method is based on direct electrochemical oxidation of these biologically active compounds using square wave voltammetry at carbon paste electrode with surface modified by sodium dodecyl sulfate (SDS/CPE) performed in 0.1 M phosphate pH 6.0 buffer. Working conditions such as pH value of supporting electrolyte, type of surfactant, accumulation time of surfactant, and parameters of square wave voltammetry were optimized. In comparison with bare carbon paste electrode, excellent reproducibility characterized by a relative standard deviation of approximately 0.3% was obtained at the SDS/CPE. Linear range from 1.0 x 10(-6) to 2.0 x 10(-5) M, limits of quantification 9.8 x 10(-8) M and detection 2.9 x 10(-8) M were found at pulse amplitude 70 mV and frequency 50 Hz selected as optimum for ethylvanillin quantification. For methylvanillin, a linear range from 7.0 x 10(-8) to 2.0 x 10(-5) M and limits of quantification 7.0 x 10(-8) M and detection 2.0 x 10(-8) M were also determined. The procedure was validated using standard high-performance liquid chromatography method in the analysis of selected complex foodstuffs such as commercial baking sugar, biscuits, and an alcoholic drink. The results showed that a direct voltammetric approach is economically advantageous and reliable for the determination of ethyl- and methylvanillin, which is fully comparable to the reverse phase HPLC used as the ISO standard.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Monatshefte fur Chemie

ISSN

0026-9247

e-ISSN

—

Volume of the periodical

149

Issue of the periodical within the volume

11

Country of publishing house

DE - GERMANY

Number of pages

9

Pages from-to

1945-1953

UT code for WoS article

000446500100002

EID of the result in the Scopus database

2-s2.0-85052953554