Figure 6: 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, (phen)T=25 × 10-4 mol dm-3 , (SDS)T=2 × 10-2 mol dm-3. λisobestic=525 nm. Temp=30°C.