摘要
黄原胶是一种具有超高分子量的细菌胞外多糖,只溶于水中,作为增粘剂而得到广泛的应用。由于其侧链上含有可电离的三糖基团,表现出很强的聚电解质行为,因而给分子量及分子量分布的测定带来许多困难。 许多学者对黄原胶的分子量进行了研究。但由于测试方法和实验条件以及样品的差异,
In this paper,four fractions of xanthan gum with different molecular weight determinedby SALS technique were prepared by ultrasonication. Taking these fractions as standards, thevarious average molecular weight of natural xanthan, M_n=1.41×10~6,M_w=3.08×10~6,M_v=2.80×10, M_z=6.65×10~6, were obtained by GPC in 0.80M NaCl aqueous solution. Themolecular weight distribution index D and intrinsic viscosity of native xanthan werecalculated as 2.18 and 2049.5mL/g respectively.
出处
《应用化学》
CAS
CSCD
北大核心
1989年第5期86-88,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
黄原胶
分子量
凝胶色谱
Xanthan
Molecular weight
Molecular weight distribution
Gel permeation chromatography
Small angle laser light scattering
