A Direct Sulfation Process of a Marine Polysaccharide in Ionic Liquid

Table 2

Molecular weight, (g/mol), the polydispersity index, and sulfur content, S (wt%) of GY785 DR and GY785 DRS obtained after sulfation carried out at different temperatures.

Derivative	Temp. (°C)	(g/mol)		S^* (wt%)	S^** (wt%)
GY785 DR	—	7,500	1.1	3.4	3.0
GY785 DRS	65	9,000	1.1	8.2	7.6
	70	11,000	1.1	9.7	10.4
	90	10,500	1.1	11.2	11.1
	120	8,000	1.3	10.7	10.1

Determined by the elemental analysis.
^**Determined by HPAEC method.