Permanency of Synthetic Ascorbic Acid Added to Milk

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Abstract
Two series of 20 samples each were prepd. by adding 75 mg. or 150 mg. of ascorbic acid to a liter of raw cow''s milk. The samples were stored in 500-ml. flasks in the dark at 10[degree]C. As aliquots were removed day by day for analysis, the volume of milk decreased and the volume of air in the flasks increased correspondingly. For the series of samples of milk to which 75 mg. of ascorbic acid per 1. was added, the loss was 11% per day for the first 3 days and 5% per day for the remaining 7 days, or 7% per day for the entire period. For the series of samples of milk to which 150 mg. of ascorbic acid per 1. was added, the loss was 6% per day for the first 4 days and 1% per day for the remaining 6 days, or an average of 3% per day for the 10 days of storage.