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Significant advances have been made in vitamin assay methodology applicable to foods over the last 10 to 15 years. However, specific problem areas exist that continue to limit the availability of accurate nutrient data for many of the vitamins. This paper will discuss some of the recent advances made in vitamin assay methodology and some of the weaknesses to be overcome in the years ahead.
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Ronald R. Eitenmiller (1990) studied this question.
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