D. Chemical Analyses
Samples were analyzed for proximate composition using standard methods (AOAC, 1990). The pH was determined using a pH meter while acidity was measured as described by Olubamiwo et al., 2007). A 0.5 ml aliquot of a 1% solution of phenolphthalein in 95% alcohol was added to 10 ml of yoghurt sample. Acidity was measured by titrating the resulting mixture with 0.1N NaOH, expressed as g equivalent lactic acid/100g. All the determinations were carried out in triplicates and mean values were calculated.