Table 1

Free SO2 consumed and (+)-catechin (cat) and (−)-epicatechin (epi) remaining after autoxidation for 27 days. From these values is calculated the amount of each quinone that was reduced to regenerate the catechol (Figure 10). SO2 values on day 27 are the mean of values obtained on day 26 and 28. (+)-Catechin is taken as the monohydrate, and (−)-epicatechin as anhydrous.

Table 1