. 2020 Sep;58(3):348–355. doi: 10.17113/ftb.58.03.20.6638

Table 3. Mass fractions of tocopherols and tocotrienols in cold pressed wheat germ oil samples stabilized with different methods.

w/(mg/kg)
Isomer	Untreated	P(microwave)/W		t(dry heat)/°C (convective oven heating)		Wet heat (steaming)
Isomer	Untreated	360	180	90	160	Wet heat (steaming)
α-tocotrienol	(8.45±0.08)^b	(8.38±0.05)^b	(7.64±0.04)^b	(8.49±0.05)^b	(8.36±0.07)^b	(12.5±0.1)^a
β-tocotrienol	(58.0±0.1)^b	(57.80±0.07)^b	(54.82±0.05)^b	(56.63±0.08)^b	(56.82±0.07)^b	(77.5±0.1)^a
γ-tocotrienol	(1.31±0.01)^ab	(1.10±0.03)^b	(1.10±0.03)^b	(1.08±0.02)^b	(1.13±0.01)^b	(1.85±0.03)^a
δ-tocotrienol	0.23±0.02	0.32±0.01	0.25±0.01	0.18±0.03	0.24±0.01	0.28±0.02
α-tocopherol	484.0±1.1	(486.5±1.0)	487.8±1.1	485.6±1.3	486.6±1.1	488.8±1.2
β-tocopherol	(414.5±1.1)^a	(413.0±1.2)^a	(415.4±1.14)^a	(415.0±1.3)^a	(412.7±1.1)^a	(364.5±1.2)^b
γ-tocopherol	(12.7±0.1)^bc	(12.19±0.08)^cd	(11.8±0.1)^d	(13.2±0.1)^b	(12.8±0.1)^bc	(14.4±0.1)^a
δ-tocopherol	(0.59±0.04)^b	(0.64±0.02)^b	(0.65±0.01)^b	(0.69±0.02)^b	(0.63±0.03)^b	(0.98±0.03)^a
Total	(979.9±1.3)^a	(980±1.2)^a	(979.2±1.2)^a	(980.9±1.3)^a	(979.5±1.2)^a	(960.8±1.2)^b
Results are expressed as mean value±standard deviation of three determinations. Different lower-case letters in the same row represent significant differences at p<0.05 (comparison between stabilized and unstabilised samples)