Effects of starch type and preparation conditions on substituent distribution in hydroxypropyl starches

摘要: Hydroxypropyl derivatives of wheat, pre-gelatinized maize, waxy maize and high amylose starches were prepared, their acid hydrolysates analysed by high-performance liquid chromatography. Molar substitution values obtained from HPLC data similar to those spectrophotometrically except for the derivative, which yielded a higher value HPLC. Substituent distribution between C-2 C-6 was same both raw wheat at two different molar substitutions latter. This parameter all three irrespective content, but approximately half that found starch. Higher alkali concentration during derivatization starch resulted in increased C-6.