The moisture content of both milk and yoghurt samples were determined by difference (AOAC, 1998Method No. 990.20):
%Moisture¼100Total solidsðTS%Þ
The fat contents of milk and yoghurt were determined using
AOAC (1998)Method No 905.02 and solids-not-fat (SNF) by subtracting percentage of fat from total solids (TS %). Total protein (%
N6.38) and ash contents were determined as described inAOAC
(1998)Methods No. 991.20 and No. 945.46, respectively.