. 2015 Nov 14;53(3):1698–1708. doi: 10.1007/s13197-015-2100-0

Table 2.

Proximate and elemental analysis of the powders prepared by milling oven- and - freeze dried pineapple peel and pomace

Parameters	Pineapple waste powder
Parameters	Oven-dried peel	Freeze-dried peel	Oven-dried pomace	Freeze-dried pomace
Moisture^†	4.32 ± 0.09^c	5.25 ± 0.14^a	4.77 ± 0.11^b	4.55 ± 0.06^bc
Crude protein^§	6.89 ± 0.13^a	6.89 ± 0.04^a	3.91 ± 0.09^b	3.82 ± 0.13^b
Crude fat^§	1.19 ± 0.06^b	1.35 ± 0.06^a	0.47 ± 0.02^c	0.34 ± 0.03^d
Total ash^§	4.56 ± 0.16^a	4.76 ± 0.05^a	2.69 ± 0.15^b	2.52 ± 0.03^b
Total dietary fiber^§	57.76 ± 1.33^a	58.48 ± 0.49^a	46.19 ± 1.41^b	44.90 ± 0.71^b
Total available carbohydrates^§	29.60 ± 1.18^b	28.52 ± 0.53^b	46.73 ± 1.42^a	48.43 ± 0.59^a
Total soluble carbohydrates^§	26.27 ± 0.87^b	27.12 ± 0.82^b	37.88 ± 1.64^a	38.29 ± 1.13^a
Calcium*	1997.97 ± 10.13^b	2206.75 ± 20.41^a	893.03 ± 3.06^c	911.34 ± 7.66^c
Magnesium*	883.36 ± 3.92^b	1031.70 ± 7.44^a	713.47 ± 2.75^d	846.16 ± 3.14^c
Sodium*	967.97 ± 4.89^b	1033.57 ± 6.34^a	610.69 ± 4.57^d	915.73 ± 18.87^c
Potassium*	8574.78 ± 8.31^b	10,144.32 ± 51.62^a	5967.28 ± 11.28^d	6395.15 ± 58.55^c
Cobalt*	5.21 ± 0.16^a	3.25 ± 0.12^b	1.21 ± 0.12^c	1.16 ± 0.03^c
Manganese*	1.22 ± 0.07^a	ND	ND	ND
Iron*	9.90 ± 0.98^b	14.82 ± 0.62^a	ND	ND
Zinc*	62.66 ± 0.08^b	85.46 ± 0.69^a	38.04 ± 0.08^d	40.00 ± 0.37^c
Copper*	285.47 ± 6.83^b	400.44 ± 2.69^a	17.83 ± 0.02^c	20.47 ± 0.13^c
Chromium*	36.96 ± 0.08^b	57.68 ± 0.68^a	ND	ND

^†Results were expressed as g/100 g of pineapple peel/pomace powder; ^§Results were expressed as g/100 g of dry matter; *Results were expressed as mg/kg of dry matter; ND Not Detected, ^abcdResults were expressed as mean ± standard deviation (n = 3) and values with different superscripts within a row were significantly different (P < 0.05)