Measuring Antioxidant Activity in Bioorganic Samples by the Differential Oxygen Uptake Apparatus: Recent Advances

Table 1

Rate constants for the autoxidation of selected organic substrates in PhCl at 303 K.

Substrate	[M^−1s^−1]	[M^−1s^−1]	/(2)^1/2
Methyl oleate	0.88	1.0 × 10^6	8.8 × 10^−4
Methyl linoleate	62	8.8 × 10^6	0.021
Toluene	0.24	3.0 × 10^8	1.4 × 10^−5
Styrene	41	4.2 × 10^7	6.3 × 10^−3
Cumene	0.32	4.6 × 10^4	1.5 × 10^−3
Tetrahydrofuran	4.3	6.2 × 10^7	1.7 × 10^−4
1,4-Cyclohexadiene	1400	1.3 × 10^9	0.038
Heptanal	2800	5.4 × 10^7	0.38

See [12]; see [13]; see [14]; neat; the propagating radical is hydroperoxyl (HOO); see [15]; the propagating radicals are an acylperoxyl; see Ref [16]; at 273 K.