Therefore, the determination of the sulfate content is in some cases suited to confirm the carrageenan types and the purity of the carrageenans. However, it cannot provide unambiguous information on the structural composition of carrageenans without further analyses. This is for example illustrated by the mean sulfate content of the ι-carrageenans (IC1-5) and the hybrid carrageenans (LC1-6) which is very similar between the two groups.