Antioxidative Reactivity of L-Ascorbic Acid and D-Isoascorbic Acid Species towards Reduction of Hexachloroiridate (IV)

Figure 6

(a) Electronic spectra recorded for 0.10 mM IAA in three different buffer solutions of 1.0 M ionic strength at 25.0°C. (b) Absorption values at 266 nm of 0.10 mM IAA solutions as a function of pH at 25.0°C (data points). The solid line was obtained from the best fit of equation (3) to experimental data by use of a nonlinear least-squares method.