Figure 8: Scanned absorption spectra of the reaction mixture at regular time intervals (3 min). (DMSO)T=75 × 10-4 mol dm-3, (Cr(VI))T=5 × 10-4 mol dm-3, (H2SO4)T=0.5 mol dm-3, (CPC)T=2×10-2 mol dm-3, (Phen)T=25 × 10-4 mol dm-3, λisobestic=512 nm. Temp=30°C.