Validação de um método de análise multi-elementar para análise de vinhos, mostos e aguardentes usando a técnica de espectroscopia de emissão ótica por plasma acoplado indutivamente (ICP-OES)

Abstract

Due to the importance of mineral content in wines in terms of food safety and quality, it is mandatory that laboratories have validated methods for their analysis and control, guaranteeing the applicability of the test for routine implementation. The present work intends to validate a multi-element analysis method by ICP-OES in wines, musts and spirits. Validation parameters such as selectivity and specificity, quantification, detection and quantification limits, precision and accuracy were studied. The method was validated for four elements: calcium, iron, copper and potassium. The specificity of the method was confirmed by obtaining recovery rates close to 100%. It was verified that the calibration functions follow a linear behavior, and the detection and quantification limits were calculated, which demonstrated the accuracy of the reported values in the applied working range. It was revealed that the most sensitive element is iron and the least sensitive is potassium. The precision of the method was attested by obtaining coefficients of variation within the stipulated limit and the accuracy was proven through participation in interlaboratory tests.

Date of Award	25 Jul 2022
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	António O. S. S. Rangel (Supervisor)