新型大孔聚合物小球NKG-1载体在甲醇和乙醇分离测定中的应用

A Study of Separation and Measurement of Methanol Ethanol Mixture with a New Spherical Macroporous Polymer NKG-1

甲醇中微量乙醇及乙醇中微量甲醇的分离与分析一直是人们颇为关注的问题。由于高含量的峰易将低含量的峰掩盖,使二者难于分离或分离度很小。文献报道,选用D-山梨醇为固定液,6201为载体需填装5—8m长色谱柱方可使乙醇和甲醇较好分离;选用聚乙二醇-20M为固定液,硅烷化白色405为载体,分离白酒中各组分,甲醇和乙醇色谱峰分离度很小;Mangani等人应用色谱法直接测定果酒中甲醇含量,检测限为≈0.05％。 本文采用南开大学高分子化学研究所研制的新型大孔聚合物小球NKG-1为载体,涂渍10％聚乙二醇-20M,仅用2m长不锈钢柱,可将甲醇和乙醇较好分离,用于定量分析其准确度、精密度均较好,检测限可达0.005％。

This paper studied the GC separation and measurement of micro-amount of methanol in ethanol and micro-amount of ethanol in methanol with a new type of macroporous polymer NKG-1 as the support and 10% polyetnyleae glycol-20M as stationary phase. The results were satisfactory. The detectable limit could reach 0.005%.