Multivariate Optimization and Principal Component Analysis for Elemental Determination in Sheep Meat from Southern
Daisa H Bonemann1, Charlie G Gomes1, Sabrina H Scherdien1
1Federal University of Pelotas (UFPel), Graduate Program in Chemistry, Chemical Metrology Laboratory (LabMeQui), Capão do Leão, RS, Brazil.
Abstract:
Sheep meat is a source of multiple nutrients, such as essential elements. Considering the increasing consumption of this type of food, this work highlights information regarding the concentration of essential elements in sheep meat samples. The best conditions for acid decomposition were obtained through multivariate optimization. In the raw samples, concentrations, in mg kg-1, ranged from 2.77 to 6.69 for Al; 0.25 to 0.27 for Ba; 0.95 to 2.75 for Cu; 33.5 to 111 for Fe; 3,609 to 5,697 for K; 202 to 381 for Mg; 0.113 to 0.711 for Mn; 329 to 771 for Na, and 31.2 to 99.4 for Zn. Principal Component Analysis showed that, although there are differences in the analyte concentrations, it was possible to identify the formation of distinct groups regarding the total amount of these elements, separating by location, which may be related to breeding system, feeding, age at slaughter, and genetic characteristics.
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