Development of an Alkaline Method for the Determination of Cu, Mo, and Zn in Beef Samples

Dublin Core

Title

Development of an Alkaline Method for the Determination of Cu, Mo, and Zn in Beef Samples

Subject

CARNE DE VACA
MICRONUTRIENTES
ESPECTROMETRIA DE ABSORCION ATOMICA
MUESTRAS ALCALINAS
BIBLIOGRAFIA NACIONAL QUIMICA
2021

Abstract

An alkaline sample treatment using tetramethylammonium hydroxide was optimized and validated for the determination of Cu, Mo, and Zn in beef samples from Uruguay, aiming to contribute to the food quality evaluation of this product. The optimization of the developed method was performed by means ofmultivariate experiments. Copper and Zn were determined by flame atomic absorption spectrometry and Mo was determined by electrothermal atomic absorption spectrometry. The proposed method consisted of adding 5.0 mL of ultrapure water to 0.25 g of the sample, followed by 1.5 mL of tetramethylammonium hydroxide 25% w w−1 and 60 min at 85 °C in a water bath. After centrifuging, the obtained solution can be used for the analytical determinations of the three elements. Certified reference materials were analyzed and a comparison with microwave-assisted acid digestion was performed to guarantee reliability. At the 95% significance level, the obtained results were statistically equivalent to the certified values and to those obtained by total acid digestion for all the studied elements. Analytical precision expressed as relative standard deviation was less than 8% in all cases. Copper, Mo, and Zn were determined in Uruguayan beef samples using the proposed alkaline method. Besides, novel information concerning Mo levels was presented in this work

Creator

Iaquinta, Fiorella
Tissot, Florencia
Lopes Fialho, Lucimar
Nóbrega, Joaquim A.
Pistón, Mariela
Machado, Ignacio

Source

Food Analytical Methods v.14, no.1, 2021. -- p. 156-164

Publisher

Springer

Date

2021

Rights

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Format

Pdf

Language

Inglés

Type

Artículo

Identifier

https://doi.org/10.1007/s12161-020-01861-w

Document Item Type Metadata

Original Format

Pdf
Date Added
December 15, 2020
Collection
Bibliografía Nacional Química
Item Type
Document
Tags
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Citation
Iaquinta, Fiorella et al., “Development of an Alkaline Method for the Determination of Cu, Mo, and Zn in Beef Samples,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed November 17, 2025, https://riquim.fq.edu.uy/items/show/6177.