【摘要】 <正> 测定烷氧基的方法很多,有重量法、碘量法、非水滴定法、色谱法、极谱法等。这些方法大都基于Zeisel反应,将试样中的烷氧基转化为碘代烷,分离后,再以适当方式测定碘代烷。然而它们多数只限于C₄以下烷氧基的测定,对高级烷氧基的测定研究较少。 Kretz采用一种特殊装置对碘代烷进行水汽蒸馏,测定达十六碳醇或相应的酯,然而该法太费时间。Ehrlich-Rogozinski采用非水滴定法测定高级烷氧基,需要两步反应,更多还原

【Abstract】 The alkoxyl compounds react with 70% of HI, and the iodoalkanes formed are extracted with a known amount of cyclohexane. Then the corresponding solution is measured by its characteristic absorption at 257nm. This method is simple, rapid, and safe, but similar accuracy as nonaqueous titration method was obtained. Because this procedure, in contrast with classical Zeisel’s method, does not necessitate distillation, it is especially suitable for the determination of alkoxylgroups whose corresponding alkyliodides are nonvolatile.更多还原