Table 1.

Efficacy of the ABTS^•+ reduction, loss of ABTS^•+ during the fast phase of the reaction and the initial rate of the reduction of ABTS^•+ by DOX, p-QH₂, Trolox C and GSH in aerated buffer pH 7.0.

Reductor	Δ[ABTS•+]/Δ[reductor]	Δ[ABTS•+]/5 s (% of initial level)d	Initial rate, µM/mine
	1.8 ± 0.1a	48.4 ± 1.3	22.0 ± 2.0
DOX	3.7 ± 0.4b
p-QH2	1.9 ± 0.1a	75.6 ± 1.5	23.4 ± 0.3
Trolox C	2.1 ± 0.1a	84.6 ± 1.8	25.6 ± 0.3
GSH	1.8 ± 0.1c	50.8 ± 1.7	15.7 ± 0.2

^aFor the fast process (first 5 s of the reaction).

^bAfter 6 min.

^cAfter 1 min.

^dAmount of ABTS^•+ lost upon the addition of 9.9 µM p-QH₂, Trolox C, GSH, or 6.9 µM DOX measured during the first 5 s after the reductor addition.

^eInitial rates were determined based on ΔA₄₁₅ over the first 5 s of the reaction and are expressed per 1 µM of a reductor.