The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides

Table 1

Properties of Carrageenan extracted from Hypnea bryoides under different alkali pre-treatment conditions.

Treatment			Yield		Sulfate
NaOH	Time	Temp.	(% w/w)^1  ± SD	(Dalton) ± SD	(% w/w)^1 ± SD
(w/v)	(h)	(°C)
4%	2	70	21.72. ± 3.61	(13.15 ± 0.64) × 10^5	07.62 ± 5.52
		75	23.44 ± 0.01	(11.50 ± 1.27) × 10^5	17.42 ± 2.97
		80	14.86 ± 3.72	(07.00 ± 7.20) × 10^5	19.22 ± 0.14
	2.75	70	17.62 ± 3.17	(12.85 ± 1.30) × 10^5	15.12 ± 3.68
		75	18.95 ± 2.59	(11.30 ± 0.57) × 10^5	13.82 ± 9.19
		80	13.24 ± 3.85	(07.50 ± 6.51) × 10^5	20.52 ± 0.00
	3.5	70	21.90 ± 0.05	(13.10 ± 0.14) × 10^5	15.92 ± 0.00
		75	15.12 ± 2.60	(12.20 ± 0.00) × 10^5	18.82 ± 3.82
		80	09.37 ± 2.37	(12.40 ± 0.00) × 10^5	21.22 ± 1.27
6%	2	70	23.06 ± 5.06	(11.80 ± 0.00) × 10^5	11.82 ± 4.38
		75	11.87 ± 1.53	(11.70 ± 0.71) × 10^5	16.42 ± 0.99
		80	15.21 ± 3.62	(11.30 ± 0.00) × 10^5	15.82 ± 3.25
	2.75	70	16.95 ± 7.39	(10.20 ± 0.14) × 10^5	14.02 ± 7.78
		75	10.15 ± 3.73	(10.00 ± 1.84) × 10^5	16.72 ± 0.28
		80	12.16 ± 3.99	(06.65 ± 5.44) × 10^5	09.82 ± 2.40
	3.5	70	26.74 ± 5.01	(13.90 ± 0.14) × 10^5	17.02 ± 0.14
		75	11.06 ± 2.62	(10.90 ± 1.41) × 10^5	16.52 ± 2.26
		80	12.69 ± 6.37	(06.10 ± 6.93) × 10^5	15.42 ± 2.69
8%	2	70	11.58 ± 1.79	(12.30 ± 1.13) × 10^5	19.62 ± 0.99
		75	11.30 ± 0.74	(12.35 ± 0.49) × 10^5	25.52 ± 1.70
		80	10.24 ± 1.07	(07.25 ± 6.15) × 10^5	21.52 ± 0.00
	2.75	70	10.85 ± 1.97	(07.10 ± 7.07) × 10^5	20.92 ± 1.98
		75	11.06 ± 0.96	(05.95 ± 0.49) × 10^5	25.32 ± 2.26
		80	08.22 ± 0.34	(07.90 ± 5.23) × 10^5	24.72 ± 1.41
	3.5	70	17.38 ± 2.39	(08.05 ± 7.14) × 10^5	23.92 ± 4.81
		75	07.58 ± 0.77	(11.25 ± 0.21) × 10^5	28.12 ± 0.57
		80	06.59 ± 0.09	(06.75 ± 6.58) × 10^5	21.72 ± 0.85

Dry basis.