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Dynamic range of the absorption at 360 nm (a) A = f (τ) during synthesis for supernatant liquid of reaction mixture under condition: Cbetulin = 2.01 mmol·L−1; νCr6+/νbetulin = 3; mbetulin/mAl2(SO4)3 = 10. 20-times dilution of sample was carried out by CH3CN–DMSO in volume ratio as 10:1. (b) ΔA = f (τ), where ΔA = Ain − Acar, Ain – initial absorption; Acar – the absorption in a time of synthesis.
