THE EFFECT OF THE SPRAY PROCESS OF DRYING ON THE VITAMIN C CONTENT OF MILK

Abstract

On account of the conflicting statements in the literature regarding the vitamin C content of dried milk products, and especially in view of definite statements regarding the effect of the spray process on vitamin C, a special investigation of this problem has been conducted. This investigation was started in February, 1922. The method consisted in feeding young guinea-pigs a standard basal diet free from vitamin C. To this was added raw liquid milk or spray process powdered milk in varying amounts, these milk products being the only source of vitamin C in the diet. The milk, both liquid and powdered, was shipped by express daily from the Merrell-Soule Powdered Milk Factory at Perry, N. Y. The milk, both raw and powdered, which was used in this experiment was taken from the mixed milk of 175 dairies representing 1,276 cows. The raw milk for feeding was drawn each day from a