Discrimination of Geographical Origin of Unroasted Kernels Argan Oil (Argania spinosa (L.) Skeels) Using Tocopherols and Chemometrics

Table 2

Mean values and standard deviations of the oil content and quality parameters of Argan oil from six provenances.

Provenance	Safi	Essaouira	Agadir	Taroudant	Tiznit	Sidi Ifni	SNIMA 08.5.090
Oil content (% dry matter)	54.94 ± 1.6b	53.43 ± 0.68ab	50.94 ± 1.12a	55.67 ± 0.41b	51.57 ± 0.80a	55.22 ± 0.36b	—
Free fatty acid (%)	0.26 ± 0.02c	0.24 ± 0.03b	0.15 ± 0.01a	0.20 ± 0.01ab	0.24 ± 0.02b	0.20 ± 0.01b	≤0.8
K232	1.05 ± 0.07a	0.94 ± 0.09a	1.14 ± 0.05a	1.03 ± 0.07a	0.98 ± 0.04a	0.99 ± 0.07a	≤2.52
K270	0.18 ± 0.03a	0.15 ± 0.02a	0.17 ± 0.03a	0.17 ± 0.01a	0.15 ± 0.02a	0.14 ± 0.02a	≤0.35
Peroxyde value (meq O2/kg oil)	1.68 ± 0.06ab	1.57 ± 0.13a	1.97 ± 0.06cd	1.46 ± 0.04a	1.83 ± 0.08bc	2.13 ± 0.07d	≤15

Values are expressed as mean ± SD. Different letters in the same line designate significant differences (). K₂₃₂ and K₂₇₀: ultra violet specific extinction at 232 and 270 nm, respectively.