Evaluation of some physicochemical parameters of three commercial milk products

Abstract

The aim of this investigation was to evaluate fresh, whole powdered and infant milk formula on the basis of physicochemical characteristics and heavy metals contents. All samples were collected from local market then analyzed to know the chemical (pH, acidity, fat, protein, lactose, ash, moisture, solids-not-fat, Lead and Cadmium) characteristics. Moisture, ash, protein and fat content for all samples ranged 1.96–86.8%, 0.5–6%, 3.34–25.5% and 3.73–26.3%, respectively. The composition and physico-chemical properties of three commercial milk samples on titratable acidity, density and solids-not-fat (SNF) have been presented. However, titratable acidity content in whole powdered milk was higher 1.51 ± 0.22% than fresh cow's milk (0.31 ± 0.18%) and infant milk 0.77 ± 0.14%.the density almost similar in fresh cow’s milk 1.02 ± 0.00, whole powdered milk1.03 ± 0.05 and infant milk 1.02 ± 0.02.while solids-not-fat (SNF) ranged from9 ±1.50 to 91 ± 0.29.Most of composition was found at higher levels in whole powdered milk as compared with fresh cow's milk and infant milk. . In this paper the mean Lead level in fresh cow's milk and whole milk powder was 0.6875±0.15 mg/kg and 3.3250±1.66 mg/kg, respectively; while it was 3.64375 ± 1.79 mg/kg in the infant milk. The Cadmium level was 1.9750±0.40, 4.0625±1.9 and 2.1125±0.56 mg/kg in fresh, whole powder and infant milk respectively.