Improvement of thermo-resistance and quality of soybean oil by blending with cold-pressed oils using simplex lattice mixture design | OCL

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Table 2

Physicochemical parameters of analyzed binary oil blends (30% crude oil with 70% soybean oil) before and after thermal treatment.

Oils blend	Parameters before treatment							Parameters after treatment

	K₂₃₂	K₂₇₀	Acidity	PV	IV	TPC	RSA	K₂₃₂	K₂₇₀	Acidity	PV	IV
Almond	3.51 ± 0.11^d	1.95 ± 0.06^c	0.56 ± 0.01^e	2.75 ± 0.11^d	114 ± 4.56^bc	44.6 ± 1.34^d	32.29 ± 0.97^c	38.56 ± 0.39^bc	6.29 ± 0.31^b	2.48 ± 0.02^e	4.37 ± 0.09^e	33 ± 0.99^c
Lentisk	3.98 ± 0.08^c	2.56 ± 0.10^a	2.26 ± 0.09^d	2.25 ± 0.02^e	110 ± 1.10^c	60.15 ± 0.60^a	40.43 ± 0.40^a	34.56 ± 1.73^d	4.92 ± 0.15^c	2.36 ± 0.07^e	6.35 ± 0.19^b	45 ± 2.25^a
Nigella	5.44 ± 0.27^b	2.57 ± 0.10^a	2.69 ± 0.13^b	3.75 ± 0.04^c	111 ± 2.22^c	53.36 ± 0.53^b	38.29 ± 0.77^b	41.36 ± 0.41^a	7.28 ± 0.29^a	4.06 ± 0.12^a	5.96 ± 0.12^c	30 ± 0.90^d
Peanut	6.09 ± 0.06^a	2.56 ± 0.10^a	2.41 ± 0.02^c	5.60 ± 0.11^a	114 ± 3.42^bc	49.98 ± 2.50^c	26.43 ± 1.06^e	42.64 ± 1.71^a	7.04 ± 0.28^a	3.57 ± 0.18^c	6.75 ± 0.07^a	33 ± 0.66^c
Sesame	3.86 ± 0.15^c	2.14 ± 0.09^b	0.56 ± 0.01^e	2.29 ± 0.02^e	118 ± 5.90^ab	49.01 ± 1.96^c	32.86 ± 0.33^c	39.04 ± 1.56^bc	5.28 ± 0.05^c	3.47 ± 0.14^c	4.96 ± 0.15^d	46 ± 1.84^a
Wild-olive	3.89 ± 0.16^c	2.17 ± 0.09^b	3.10 ± 0.09^a	4.25 ± 0.13^b	116 ± 2.32^bc	55.2 ± 1.66^b	29.86 ± 1.49^d	38.46 ± 0.77^c	6.63 ± 0.20^b	3.83 ± 0.08^b	5.75 ± 0.17^c	31 ± 0.93^cd
Control (Soybean oil)	3.17 ± 0.13^e	1.23 ± 0.06^d	0.23 ± 0.01^f	1.33 ± 0.03^f	124 ± 4.96^a	42.36 ± 0.85^d	30.29 ± 0.30^d	40.62 ± 0.81^ab	6.47 ± 0.19^b	3.26 ± 0.10^d	6.5 ± 0.33^ab	40 ± 1.60^b

K₂₃₂ and K₂₇₀: UV absorption coefficients at 232 and 270 nm; Acidity, expressed as equivalent oleic acid percentage; Peroxide value (PV), expressed as milliequivalents oxygen/kg oil; Iodine value (IV), expressed as mg KOH/g oil; TPC, expressed as mg GAE/100 g oil; RSA, ABTS⁺ radical scavenging activity (%); for each column, results with different letters are statistically different (ANOVA-LSD, p < 0.05, a > b > c > d > e > f).

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