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Dintzis曾用经典光散射法测得经90℃、4 mool/L尿素处理3h的黄原胶分子量为2×10~6,不加热的分子量为13×10~6和50×10~6,但未知确切数据.Rinaudo和Milas以相同的方法在l×10~(-3)～l mool/L的氯化钠溶液中测得黄原胶的分子量为2×10~6.Southwick用动态光散射法在4 mol/L尿素中测出其分子量为2.16×10~6.G Holzwarth用透射电镜测出分子量为4×10~6～20×10~6之后,他又通过测定沉降系数和特性粘数,由MFS等式算出黄原胶原始分子量为15×10~6.可见,虽然实验方法和样品不同,但仍可确定其分子量在2×10~650×10~6之间。
Dintzis used the classical light scattering method to determine the molecular weight of xanthan gum which is treated with 4 mool / L urea at 90 ℃ for 3h, the molecular weight of xanthan gum is 2 × 10 ~ 6, the unheated molecular weight is 13 × 10 ~ 6 and 50 × 10 ~ 6 Unknown exact data. Rinaudo and Milas in the same way in the lx10 ~ (-3) ~ l mool / L sodium chloride solution measured xanthan gum molecular weight of 2 × 10 ~ 6. Southwick using dynamic light scattering Method in 4 mol / L urea measured its molecular weight of 2.16 × 10 ~ 6.G Holzwarth measured by transmission electron microscopy, the molecular weight of 4 × 10 ~ 6 ~ 20 × 10 ~ 6, he also by measuring the sedimentation coefficient and intrinsic viscosity The original molecular weight of xanthan gum calculated by the MFS equation is 15 × 10 ~ 6. It can be seen that although the experimental method and the sample are different, the molecular weight of the xanthan gum can still be determined to be between 2 × 10 and 650 × 10 ~ 6.