胶体滴定法测定羧甲基壳聚糖的取代度

The Determination of Substitution Degree of Carboxymethyl Chitosan by Colloid Titration

用胶体滴定法测定羧甲基壳聚糖取代度 ;讨论 pH值、溶液浓度、滴定速度和离子强度对胶体滴定的影响 ,并比较胶体滴定法、电位滴定法和元素分析法的优劣 ;结果表明胶体滴定法是一种快速、简便地定量测定CMC取代度的方法 ,且是测定CMC取代度的优选方法。

Colloid titration was used to determine the substitution degree of carboxymethyl chitosan.The effects of pH,concentration of solutions,speed of titration and NaCl concentration on colloid titration were discussed.The advantages and disadvantages of colloid titration were compared with electrolytic titration and elemental analysis.The results showed that colloid titration was a quick and simple quantitative and optimum method to determine substitution degree of carboxymethyl chitosan.