Improved Calcium Sequestering Carbohydrate Based Agents

• Published in: Die Stärke Vol. 55; no. 10; pp. 443 - 449
• Main Authors: Besemer, Arie C., Jetten, Jan M., Slaghek, Ted M.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.10.2003; WILEY‐VCH Verlag; Wiley-VCH
• Subjects: Biological and medical sciences; Co-builder; Food industries; Fundamental and applied biological sciences. Psychology; Metaperiodate; Sequestering; Starch and starchy product industries; Starch oxidation; Starch; Formulation; Biopolymer; Cleaning materials; Sequestering power; Oxidation; Metaperiodates; Polysaccharide
• ISSN: 0038-9056; 1521-379X
• DOI: 10.1002/star.200300216

The improved tandem oxidation sequence of starch with the aim of developing, e.g. degradable co‐builders suitable for laundry formulations as an alternative to the currently used polyacrylates is described. The tandem oxidation of starch starts with sodium periodate treatment of granular starch followed by oxidation of the dialdehyde product with sodium chlorite to dicarboxy starch. It turns out that improving the periodate oxidation resulting in a more complete transformation of the glucose moiety into the dialdehyde product yields, after sodium chlorite oxidation, a dicarboxy starch with a calcium sequestering capacity of 3.3 mmol Ca2+ per gram of dicarboxy product. This is an improvement of about 25% compared with current literature data.