Particle Size and Stability of Calcium Fortified Sterilized Goat Milk and Consumer Acceptance

Abstract

Addition of calcium compounds affects particle size and induces sedimentation of milk products. This study compared skim milk particle size of raw goat milk, sterilized goat milk, and sterilized goat milk supplemented with 30 mM tricalcium phosphate by Laser diffraction Mastersizer X. The mean particle sizes were 0.543, 1.063 and 2.603 μm, respectively. A study of sediment content and color to be a guideline for calcium supplements containing goat milk was compared in 5 trials: 1) sterilized goat milk, 2) calcium sterilized goat milk, 3) sterilized goat milk treated with calcium and supplemented with 0.025% (w/w) carrageenan (C), 4) 1% (w/w) disodium hydrogen phosphate (DSHP), and 5) 1% (w/w) trisodium citrate (TSC). The results found that the addition of DSHP and TSC resulted in lower milk lightness, higher in red and yellow value, and greater sediment formation. During 90 days of storage, the sediment content of treatments using stabilizers was not different. Based on the findings of a survey involving 150 consumers, four dominant factors emerged as significant influencers of milk purchasing behavior: health benefits, accessibility, quality certifications, and convenience of consumption. In this study, sterilized goat milk fortified with 30 mM tricalcium phosphate was accepted by 88.32% of consumers.