Table 2. Antioxidant activity and urushiol concentration of the Rhus verniciflua extracts

Variables	Treatments¹						SEM
Variables	RRV	BHT	35°C	100°C	120°C	140°C	SEM
DPPH³⁾ (EC₅₀µg/mL)	321.22^a	77.52^d	323.33^a	98.79^c	62.29^e	179.69^b	1.97
ABTS⁴⁾ (IC₅₀mg/mL)	45.41^a	17.55^c	43.12^a	27.46^b	12.11^d	23.12^b	0.97
Urushiol (µg/mL)	1.49^a	ND	1.06^b	0.48^c	ND	ND	0.06

35°C, Rhus verniciflua extract pre-heated at 35°C; 100°C, Rhus verniciflua extract pre-heated at 100°C; 120°C, Rhus verniciflua extract pre-heated at 120°C; 140°C, Rhus verniciflua extract pre-heated at 140°C.
Means with different superscripts indicate a significant difference among treatments (p < 0.05).
RRV, Raw Rhus verniciflua extract; BHT, 2,6-di-tert-butyl-hydroxytoluene; DPPH, 2,2-diphenyl-1-picrylhydrazyl; ABTS, azino-bis(3-ethylbenzothiazoline-6-sulfonic acid); ND, not detected.