Notizen: ESR Investigations on the M odification o f the Ascorbic Acid-Erythrocyte Interaction by Ferrous Ions

Abstract

An ascorbic acid-erythrocyte interaction results in the formation of the semidehydroascorbate (SDA) radical and an increase in spin concentration. Addition of a more than ten-fold concentration of Fe²⁺ (as FeSO₄) to such a system compensates the effect produced by ascorbic acid, that is the electron spin resonance spectrum obtained resembles very closely that of erythrocytes only. With the dis­appearance of the SDA radical a high spin ferric ion signal appears concomitantly at g = 4.3.