Electrochemical Behavior and Sensitive Methods of the Voltammetric Determination of Food Azo Dyes Amaranth and Allura Red AC on Amalgam Electrodes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00500342" target="_blank" >RIV/61388955:_____/19:00500342 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/19:10391646

Result on the web

<a href="http://hdl.handle.net/11104/0296771" target="_blank" >http://hdl.handle.net/11104/0296771</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12161-018-1372-1" target="_blank" >10.1007/s12161-018-1372-1</a>

Result language

angličtina

Original language name

Electrochemical Behavior and Sensitive Methods of the Voltammetric Determination of Food Azo Dyes Amaranth and Allura Red AC on Amalgam Electrodes

Original language description

The novel and highly sensitive methods for individual determination of two food azo dyes Amaranth (AM, E 123) and Allura Red AC (AR, E 129) in the commercial beverages were successfully developed on two types of silver solid amalgam electrodes, namely mercury meniscus modified (m-AgSAE) and liquid mercury free polished (p-AgSAE) amalgam electrodes, using differential pulse adsorptive stripping voltammetry (DP-AdSV) and direct current adsorptive stripping voltammetry (DC-AdSV) for the first time. In addition, the reduction processes of AM and AR on amalgam electrodes were compared with the processes on hanging mercury drop electrode. The influence of pH, accumulation potential, and accumulation time on the signal enhancement of AM and AR were investigated. The number of electrons and the number of protons participating in the rate-determining step of the reduction process for azo dyes were calculated. Due to the significantly increasing reduction peak currents of AM and AR on m-AgSAE and p-AgSAE caused by their adsorption at the electrode surface, the amalgam electrodes exhibit the wide linear ranges and good sensitivity to the determination of AM and AR. For example, the limits of detection were found to be 2.1 × 10−9 mol L−1 for AM and 3.4 × 10−9 mol L−1 for AR on m-AgSAE using DC-AdSV. Moreover, the amalgam electrodes showed good repeatability (RSD lower than 5.0% for 5 × 10−8 mol L−1 of tested azo dyes) and stability and it was confirmed that these electrodes are useful tools to azo dye monitoring in a food safety control field.

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

—

OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

<a href="/en/project/GA17-03868S" target="_blank" >GA17-03868S: New Methods of Electrochemical Monitoring of Biologically Active Organic Compounds in Environmental, Biological and Food Matrices</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Food Analytical Methods

ISSN

1936-9751

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

409-421

UT code for WoS article

000455514300010

EID of the result in the Scopus database

2-s2.0-85055319909