. 2017 Jul 27;26(4):911–920. doi: 10.1007/s10068-017-0132-0

Table 3.

Peroxide, p-anisidine, iodine, free fatty acid, acid, and conjugated diene and triene values of peanut oils obtained via superheated-steam and conventional roasting at three different temperatures (150, 200, and 250 °C)for different roasting times

Roasting modes	Temperature (°C)	Time (min)	Peroxide value (meq/kg)	p-anisidine value	Iodine value	Free fatty acid value (%)	Acid value (%)	Conjugated diene (K₂₃₂)	Conjugated triene (K₂₇₀)
Raw			1.05 ± 0.03^a	1.26 ± 0.04^a	94.95 ± 0.04^o	1.83 ± 0.06^a	3.53 ± 0.07^a	1.43 ± 0.05ⁱ	0.17 ± 0.06^k
Superheated steam	150	5	1.12 ± 0.02^ab	1.66 ± 0.05^g	94.18 ± 0.03ⁿ	2.03 ± 0.06^b	3.90 ± 0.09^ab	0.38 ± 0.01^a	0.04 ± 0.01^a
		20	2.02 ± 0.02^f	2.83 ± 0.21^jk	92.85 ± 0.02^l	2.23 ± 0.06^cd	4.32 ± 0.17^bc	0.39 ± 0.01^a	0.05 ± 0.01^b
		40	3.78 ± 0.02^l	4.59 ± 0.13^o	90.05 ± 0.03^fg	2.43 ± 0.06^efg	4.79 ± 0.01^cde	0.41 ± 0.01^ab	0.07 ± 0.01^gh
	200	5	1.55 ± 0.02^d	1.79 ± 0.23^c	93.45 ± 0.01^m	2.17 ± 0.06^bc	4.63 ± 0.47^cd	0.41 ± 0.01^ab	0.06 ± 0.01^c
		10	2.23 ± 0.05^g	2.14 ± 0.32^h	91.42 ± 0.02^k	2.57 ± 0.06^fgh	5.27 ± 0.26^def	0.45 ± 0.01^bc	0.07 ± 0.01^def
		20	3.46 ± 0.03^k	3.55 ± 0.25^ij	90.87 ± 0.04ⁱ	2.77 ± 0.05^ij	5.46 ± 0.25^ef	0.60 ± 0.01^gh	0.07 ± 0.01^h
	250	2	1.37 ± 0.03^c	2.02 ± 0.29^b	91.16 ± 0.01^j	1.83 ± 0.06^a	3.53 ± 0.05^a	0.39 ± 0.00^a	0.06 ± 0.01^de
		5	2.05 ± 0.01^f	2.19 ± 0.29^d	90.11 ± 0.03^g	2.37 ± 0.06^de	4.83 ± 0.11^cde	0.46 ± 0.01^cd	0.07 ± 0.00^efg
		10	3.94 ± 0.04^m	3.86 ± 0.27ⁱ	89.14 ± 0.03^e	2.77 ± 0.06^ij	5.55 ± 0.05^f	0.51 ± 0.01^de	0.08 ± 0.01ⁱ
Conventional	150	5	1.16 ± 0.02^b	1.88 ± 0.27^f	90.92 ± 0.03ⁱ	2.03 ± 0.05^b	3.93 ± 0.10^ab	0.41 ± 0.01^ab	0.04 ± 0.01^ab
		25	2.55 ± 0.02^h	2.45 ± 0.15^l	90.32 ± 0.03^h	2.43 ± 0.06^efg	4.78 ± 0.04^cde	0.43 ± 0.01^abc	0.04 ± 0.00^b
		45	4.72 ± 0.04^o	3.44 ± 0.15ⁿ	89.15 ± 0.02^e	2.77 ± 0.06^ij	5.15 ± 0.67^def	0.43 ± 0.01^abc	0.07 ± 0.01^def
	200	5	1.73 ± 0.04^e	2.44 ± 0.11^c	89.97 ± 0.03^f	2.40 ± 0.01^def	4.78 ± 0.06^cde	0.41 ± 0.01^ab	0.06 ± 0.01^d
		15	2.79 ± 0.01ⁱ	2.59 ± 0.33^h	88.91 ± 0.02^d	2.57 ± 0.06^fgh	5.17 ± 0.03^def	0.42 ± 0.00^abc	0.07 ± 0.06^def
		25	4.33 ± 0.02ⁿ	3.53 ± 0.38^k	88.05 ± 0.04^a	2.83 ± 0.55^j	5.57 ± 0.02^f	0.57 ± 0.01^fg	0.08 ± 0.01ⁱ
	250	5	2.77 ± 0.02ⁱ	2.89 ± 0.12^e	89.15 ± 0.03^e	2.60 ± 0.01^ghi	5.23 ± 0.08^def	0.51 ± 0.01^e	0.07 ± 0.99^def
		10	3.25 ± 0.04^j	3.58 ± 0.18ⁱ	88.46 ± 0.04^c	2.63 ± 0.06^hi	5.37 ± 0.18^ef	0.55 ± 0.01^ef	0.07 ± 0.02^fgh
		15	3.88 ± 0.02^m	4.02 ± 0.31^m	88.22 ± 0.03^b	2.83 ± 0.06^j	5.53 ± 0.01^f	0.63 ± 0.01^h	0.12 ± 0.00^j

Mean ± standard deviation

Different letter indicates significant different between values (p < 0.05)