The reasons for the low recovery of thiamine from flour fortification mixtures containing ingredients used for the treatment of flour, in addition to iron, vitamins and chalk, are examined. The presence of potassium bromate and chalk is shown to be the cause of low recoveries, and methods for overcoming the interference of these substances with the analysis for thiamine content are described.
H. V. Hart and K. H. Willis, Analyst, 1970, 95, 312 DOI: 10.1039/AN9709500312
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