. 2018 Aug 21;55(10):4212–4222. doi: 10.1007/s13197-018-3357-x

Table 4.

Evaluation of total phenols (expressed as GAE- gallic acid equivalents), total carotenoids and chlorophyll content of extra-virgin olive oil, with or without L. nobilis essential oil (0.1% v/v), stored in accelerated photooxidation conditions from 30 to 90 days in different packaging materials

	Virgin olive oil with essential oil				Virgin olive oil without essential oil
	PET	BPET	TG	BG	PET	BPET	TG	BG
	Total phenols (mg_GAE/kg)
30 days	739.64 ± 1.03^s	753.76 ± 5.19^t	648.77 ± 1.64^q	896.42 ± 3.30^v	284.36 ± 0.52ⁱ	411.95 ± 0.71ⁿ	350.75 ± 1.62^m	685.96 ± 2.26^r
60 days	564.97 ± 4.33^p	297.08 ± 2.26^j	527.30 ± 2.61^o	782.01 ± 6.29^u	201.50 ± 1.76^f	287.19 ± 1.55ⁱ	271.65 ± 2.19^h	329.56 ± 0.77^l
90 days	193.03 ± 1.13^e	296.61 ± 3.17^j	230.69 ± 6.36^g	306.02 ± 3.39^k	109.22 ± 0.84^b	131.82 ± 1.42^c	84.74 ± 0.70^a	141.24 ± 0.56^d
	Total carotenoids (mg/kg)
30 days	0.77 ± 0.02^ijk	0.92 ± 0.05^l	0.72 ± 0.05^ghij	1.12 ± 0.05^m	0.72 ± 0.07^ghij	0.81 ± 0.06^jkl	0.77 ± 0.02^ijk	1.05 ± 0.08^m
60 days	0.59 ± 0.00^ef	0.85 ± 0.03^kl	0.60 ± 0.02^efg	0.66 ± 0.02^fghi	0.64 ± 0.01^fgh	0.75 ± 0.03^hijk	0.41 ± 0.02^bc	0.64 ± 0.02^fgh
90 days	0.40 ± 0.00^bc	0.54 ± 0.04^def	0.43 ± 0.00^bcd	0.63 ± 0.04^efgh	0.21 ± 0.00^a	0.41 ± 0.07^bc	0.32 ± 0.02^ab	0.51 ± 0.01^cde
	Chlorophyll (mg/kg)
30 days	0.55 ± 0.03^de	0.97 ± 0.02ⁱ	0.73 ± 0.04^g	1.51 ± 0.06^l	0.83 ± 0.01^h	1.02 ± 0.02^ij	0.63 ± 0.02^ef	1.14 ± 0.08^k
60 days	0.52 ± 0.02^d	0.63 ± 0.04^ef	0.71 ± 0.06^fg	1.07 ± 0.02^jk	0.52 ± 0.02^d	0.63 ± 0.04^ef	0.48 ± 0.04^cd	0.79 ± 0.04^gh
90 days	0.42 ± 0.02^bc	0.53 ± 0.04^d	0.48 ± 0.01^cd	0.79 ± 0.00^gh	0.22 ± 0.01^a	0.35 ± 0.01^b	0.35 ± 0.02^b	0.37 ± 0.02^b

Values are reported as the mean ± S.D. of replicates (n = 3). Same letter, under the same parameter, indicates the means are not significantly different according to ANOVA and Tukey’s post hoc test (p < 0.05)

TPET transparent polyethylene terephthalate, BPET brown PET, TG transparent glass, BG brown glass