ISO/TR 9372:1993 塑料.聚氨酯的基底材料.甲苯二异氰酸盐中2.4-和2.6-异构体含量的红外光谱法测定

标准编号：ISO/TR 9372:1993

中文名称：塑料.聚氨酯的基底材料.甲苯二异氰酸盐中2.4-和2.6-异构体含量的红外光谱法测定

英文名称：Plastics — Basic materials for polyurethanes — Determination of the amounts of 2,4- and 2,6-isomers in toluenediisocyanate by infrared spectroscopy

发布日期：1993-03

标准范围

该方法的原理是制备待分析样品的环己烷溶液，测量810 cm^-1和782 cm^-1条带的吸光度，这是芳香环上1,2,4-和1,2,6-位置的特征，并计算吸光度比。适用于含有5%至95%2,4-异构体的混合物。

The principle of the method is preparing a cyclohexane solution of the sample to be analyzed, measuring the absorbance for the 810 cm^-1 and 782 cm^-1 bands which are characteristic of the 1,2,4- and 1,2,6-positions on the aromatic ring, and calculating the absorbance ratio. Applies to mixtures containing 5 % to 95 % of the 2,4-isomer.

标准预览图