Table 1.

Gravimetric analysis of lipophilic and polar extracts.

Sample	Extracted Groups	Gravimetric Quantification (mg/g) *	GC Quantification (mg/g) *
Hazelnuts shells	Lipophilic (L)	9.64 ± 0.43	7.01
	Hydrophilic (H)	13.80 ± 0.74	7.88
	Total	23.44	14.89
	L/H ratio	0.70	0.89
Walnuts shells	Lipophilic (L)	5.24 ± 0.18	3.84
	Hydrophilic (H)	22.68 ± 1.37	17.80
	Total	27.92	21.64
	L/H ratio	0.23	0.21

* mg of extracts per g of shells; standard deviation (n = 3).