Table 1.

Dissolved oxygen consumption rates in three different accelerated ageing tests. Rates are expressed as mean values ± standard error. Different letters indicate a significant difference (Tukey test, α = 0.05) between oxidation protocols.

Oxidation Protocol	Oxygen Consumption Rate (ppm·h−1)
Heat test −60 °C	2.40 ± 0.06 a
Laccase test	3.33 ± 0.05 b
Hydrogen peroxide test	2.86 ± 0.28 c