Journal
QUIMICA NOVA
Volume 36, Issue 9, Pages 1416-1422Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422013000900023
Keywords
quality control; NIRS; multivariate metrology
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This study developed and validated a method for moisture determination in artisanal Minas cheese, using near-infrared spectroscopy and partial-least-squares. The model robustness was assured by broad sample diversity, real conditions of routine analysis, variable selection, outlier detection and analytical validation. The model was built from 28.5-55.5% w/w, with a root-mean-square-error-of-prediction of 1.6%. After its adoption, the method stability was confirmed over a period of two years through the development of a control chart. Besides this specific method, the present study sought to provide an example multivariate metrological methodology with potential for application in several areas, including new aspects, such as more stringent evaluation of the linearity of multivariate methods.
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