Comparison of Ascorbic Acid Concentrations in Whole Blood Obtained by Venipuncture or by Finger Prick
- 1 September 1972
- journal article
- research article
- Published by Oxford University Press (OUP) in Clinical Chemistry
- Vol. 18 (9) , 968-970
- https://doi.org/10.1093/clinchem/18.9.968
Abstract
Vitamin C (ascorbic acid) concentrations in whole blood obtained by finger prick or by venipuncture have been shown to be equivalent when measured by the 2,4-dinitrophenylhydrazine procedure. Whole blood obtained by either technique is stable for at least 6 h at 25°C, and for as long as 28 days when stabilized with trichloroacetic acid and stored at 4°C. Storage of whole blood at -70°C is accompanied by an initial loss (10-20%) of vitamin C; however, additional losses of vitamin C do not occur beyond the third day of storage.Keywords
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