How to identify pharmaceutical raw materials and excipients by Raman instrument?
Starch is a complex polymer. It consists of glycoside bonds connecting glucose units. And because of its multifunctionality, it is used by important medicinal accessories. Solid starch has the motion of granular. The varieties and growing environment of starch influence its size and it is divided into straight chain and branched chain. The starch of staight chain has 50 to 6000 glucosamine residues for aggregation. The branched chain starch has, A , B & C, three kinds of chain. C chain is backbone with more than 60 glucosamine residues and a terminal saccharide residues. B chain is the branched chain of C, its aggregation has 45 to 55 glucosamine residues. A is the branched chain of B with 14 to 18 glucosamine residues. Different chain has different nature and its own effect by ingredients.