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The accurate and reproducible measurement of ascorbic acid is essential in delineating the role of ascorbic acid as a diagnostic tool for human disease and for the comparison of data acquired by different laboratories. A stabilized pair of standards of ascorbic acid in human serum, which is compatible with most analytical methods, have been prepared.

Certification of Standard Reference Material 970, Ascorbic Acid in Serum, and Analysis of Associated Interlaboratory Bias in the Measurement Process