Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	Measurement of Total Milk Solids by Microwave Heating [PDF]
AUTHORS	Y. Takahashi, A. Nagai, N. Suga and J. Chiba 1978 13 2 167-172
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Abstract The milk trade has long been based on the fat content of milk. A recent problem is the increase of cows whose milk shows lack of correlation between far content and solids not fat (SNF). Consequently, a measuring instrument which enables rapid determination of total milk solids (TMS) is needed. Solids not fat is obtained by subtracting fat content measured by an existing method from the TMS. A total milk solids measuring instrument which dries the sample quickly by microwave heating, weighs the sample before and after drying, and indicates the TMS with the re4solution of 0.01% TMS has been developed. The instrument consists of a microwave generator, a waveguide type oven, and electrobalance, and an indicator unit. Compared with the official method which requires about 8 h to measure one sample, the whole measurement time with the new instrument is only 3.5 min. The difference between the results obtained with the new instrument and the official methods were less that ± 0.05% TMS, dispersion was better than the official method and the standard deviation was 0.018% TMS.