Quantification of minerals and trace elements in raw caprine milk using flame atomic absorption spectrophotometry and flame photometry

J Food Sci Technol. 2015 Aug;52(8):5299-304. doi: 10.1007/s13197-014-1538-9. Epub 2014 Aug 31.

Abstract

This study reports minerals and trace elements quantification in raw caprine milk of Beetal breed, reared in Northern India and their feed, fodder & water using flame atomic absorption spectrophotometry and flame photometry. The mineral and trace elements' concentration in the milk was in the order: K > Ca > Na > Fe > Zn > Cu. The results showed that minerals concentration in caprine milk was lesser than reference values. But trace elements concentration (Fe and Zn) was higher than reference values. Multivariate statistical techniques, viz., Pearsons' correlation, Cluster analysis (CA) and Principal component analysis (PCA) were applied to analyze the interdependences within studied variables in caprine milk. Significantly positive correlations were observed between Fe - Zn, Zn - K, Ca - Na and Ca - pH. The results of correlation matrix were further supported by Cluster analysis and Principal component analysis as primary cluster pairs were found for Ca - pH, Ca - Na and Fe - Zn in the raw milk. No correlation was found between mineral & trace elements content of the milk and feed.

Keywords: Atomic absorption spectrophotometry Flame photometry; Caprine milk; Minerals; Principal component analysis (PCA); Trace elements.