Complementarity of Raman and Infrared spectroscopy for rapid characterization of fucoidan extracts

Table 1 Chemical characterization of fucoidan samples and references

Sample	Mw [kDa]	Mw Relative intensity [%]	Sulfate ester content [%]	Nitrogen content
Fucoidan reference	1884	91.15	31.56 ± 2.44	0.02 ± 0.02
	809	2.8
	611	4.93
	4	1.12
Laminarin reference	5400	3.29	10.92 ± 2.44	0.16 ± 0.02
	3155	2.4
	1010	9.8
	598	0.62
	12	1.21
	7	82.68
H₂O extract	52,658	16.12	16.2 ± 2.44	0.23 ± 0.02
	3260	26.66
	470	34.58
	340	8.78
	9	3.34
	7	5.84
	5	3.42
	4	1.27
H₂SO₄ extract	1545	88.48	17.85 ± 2.44	0.12 ± 0.22
	611	5.34
	8	2.31
	7	3.15
	5	0.72
HCl extract	961	84.67	20.93 ± 2.44	0.16 ± 0.02
	547	7.34
	8	4.31
	7	3.09
	5	0.59

Size distribution and the intensity of each polymer weight in RID, and the results of the elemental analysis on the sulfate ester content (calculated from S%) and the nitrogen content of each extract and reference

ISSN: 1746-4811