FIELD: vitamin production. SUBSTANCE: aqueous solution containing 0.05 g ascorbic acid, 0.02385 g sodium bicarbonate, and 0.001 g sodium sulfate is subjected to sterilizing filtration and then powered out into ampoules. Sterilizing filtration is performed through membrane or cartridge filter with pore size 0.20-0.22 mcm. Preparation poured into ampoules is frozen at temperature from 45 to 55 C and dried in lyophilic mode at residual pressure no higher than 100 mcm Hg. EFFECT: increased preparation stability. 1 tbl
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