Part of the concentrate is treated with aqueous NaOH to saponify the adipate and acetate substituents. Aqueous NaOH (10 M, 0.9 ml) is added to concentrate (8.1 ml) on an ice bath with manual agitation and the mixture is rotated at ambient temperature (30 min). Part of the mixture containing the saponified starch product is assayed for iodine binding capacity as described in Section 2.7 and carbohydrate content (anthrone assay). This allows the calculation of the amylose content of solubilised starch. Another part of this mixture is neutralised carefully with HCl (4 M), diluted with 4 volumes of DMSO, filtrated as described above, and analysed by SEC-MALLS-RI. The latter analysis yields the molar mass after removal of the cross-links