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CHEMICAL DETERMINATION OF VITAMIN B1

1939; Elsevier BV; Volume: 127; Issue: 2 Linguagem: Inglês

10.1016/s0021-9258(18)73805-2

1083-351X

Daniel Melnick, Henry Field,

Vitamin C and Antioxidants Research

for supplying us with synthetic preparations of these compounds.The cocarboxylase was in aqueous solution containing in addition some of the monophosphate and unchanged thiamine chloride.The monophosphate was supplied as the crystalline product.* These colors cannot be observed unless the reaction is carried out in the presence of ethanol alone.When phenol also is used to increase the sensitivity of the reaction, these colors are masked by that due to the phenolic derivative.