N-甲基吗啉含量测定方法研究

Research on Determination of N-methylmorpholine Content

建立测定N-甲基吗啉含量测定的非水滴定法。以醋酐作溶剂,结晶紫作指示剂,照指示剂法用高氯酸滴定液滴定。本法测定值的相对标准偏差RSD均小于2%。本法操作简单,滴定终点清晰,重复性好,可作为测定N-甲基吗啉含量的方法。

A non-aqueous titration method to determine N-methylmorpholine content was established. The non-aqueous titration method was performed with acetic anhydride as solvent, perchloric acid as titrant, crystal violet as indicator. Relative standard deviations （RSD） of the determined values were less than 2%. The method has the advantages of easy operation, clear titration endpoint and good repeatability. The method can be used to determine the content of N-methylmorpholine.