| || Quick Test for Quality Deterioration in Processed Foods Quick Test for Quality Deterioration in Processed Foods
Author : Arya, S.S. ;Madhura, C.V.;Premavalli, K.S.
Source : Defence Science Journal ; Vol:48(3) ; 1998 ; pp 257-262
Subject : 641 Food Sciences
Keywords : Milk powder ;Indicator test solution
Abstract : A quick test for quality deterioration of milk powder, refined oil and atta, based on the indicator test solution was studied. The indicator test solution comprising NaOH and bromotnyml blue indicator remains stable for 6 months in glass bottles. Depending on the acidity of the sample, the colour changed from blue to light blue to green to yellow. The concentration of the indicator test solution is optimised for each product, viz., 4 ml for milk powder and refined oil and 2 ml for atta, to which 1 ml aqueous sample or oil is added which gives the colour Change. The appearance of green colour is considered the cutoff point for inferior quality and is based on the limits specified by the Bureau of Indian Standards for these products. The test has proved its efficacy in quality checking during storage of milk powder and deep fat frying of products in refined oils.