Evaluation of a Direct Spectrophotometric Method for the Rapid Determination of Ascorbate and Dehydroascorbate in Blood Using Ascorbate Oxidase

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Abstract
The application of a technique for the direct spectrophotometric determination of ascorbate and dehydroascorbate in blood samples is described. The reliability of the test system and various disturbing factors are assessed. It is concluded that the technique possesses a high specificity and that interferences by various biochemicals and metabolic intermediates are low. The lowest ascorbate concentration detectable in plasma by this assay is estimated to be about 1 .mu.mol/l.