A Direct Sulfation Process of a Marine Polysaccharide in Ionic Liquid

Table 1

Molecular weight, Mw (g/mol), the polydispersity index, Ip and sulfur content, S (wt%) of GY785 DR and GY785 DRS (before and after sulfation, respectively).

Derivative	Solvent	Temp. (°C)	(g/mol)		S^* (wt%)	S^** (wt%)
GY785 DR	—	—	7,500	1.1	3.4	3.0
GY785 DRS	BMImCl	70	11,000	1.1	9.7	10.4
	DMF	45	16,000	1.1	16.4	16.0

Determined by the elemental analysis.
Determined by HPAEC method.