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Sensors

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Electrochemical Sensor for the Determination of Methylthiouracil in Meat Samples.

Published:15 November 2022 DOI: 10.3390/s22228842 PMID: 36433439
Andrea Marco, Antonio Canals, Emilia Morallón, Miguel ángel Aguirre

Abstract

Two analytical methods based on miniaturized electrochemical sensors, voltammetric and amperometric sensors, have been developed for the determination of 6-methyl-2-thiouracil (MTU) in meat consumption samples (beef liver and foie). A multivariate approach has been considered to optimize the experimental procedure including extraction and electrochemical detection. Under optimal conditions and at a typical working potential of 1.55 V (vs Ag pseudo-reference electrode), response is linear in the range 0 to 20 μg L?1 MTU concentration range. The empirical limit of detection is 0.13 μg L?1, lower than the maximum concentration established by legislation. The electrochemical methods have been used to analyze MTU-spiked meat samples, and recovery values varying between 85 and 95% with coefficients of variation <30%. The analytical methods developed with the miniaturized electrochemical sensors can successfully determine the concentration of MTU in real meat samples with high accuracy, being the results obtained similar to those provided by other methods such as UV-Vis spectrophotometry. Finally, the degree of sustainability of the electrochemical sensors-based developed method has been quantified by means of the Analytical Eco-Scale.

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Methylthiouracil 56-04-2 C5H6N2OS 458 suppliers $5.00-$920.00

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