Detection of the water added in raw milk using inter digital electrode

Abstract

The objective of this study was to develop a technique for detection of the water added in raw milk using Inter Digital Electrode (IDE), other than using conventional methods such as determination of specific gravity or of the freezing point temperature, and the compression on frozen samples. The assumption, capacitance value of added water in raw milk will be varied with the quantities of added water. The experiment was performed by using a LCR (GW INSTEK LCR-817) meter to measure the capacitance value of milk contaminated water from 0 to 90% and electrodes which are normal and ground of different electrode number (N) of 7 10 and 13, width (W) of 1 and 2 mm. and length (L) of 10 20 30 40 and 50 mm. Results shown that the capacitance value of the water added in raw milk were lower than the raw milk without added water. Additional, the W1L50N13G (W=1 mm. L=50 mm. N=13, and grounded) detects the water added in raw milk with R2 of 0.9904