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微量钾的分光光度法测定,由于引用冠醚化合物取得了较大的进展。本文合成了一种新型双冠醚。探讨了萃取测定钾的适宜条件,共存离子的影响及络合物的组成。该法适用于自来水、河水中微量钾的测定。 1.双冠醚(BC)的合成:用30ml无水二氧六环溶解5.42g(19.2M)4＇-氨基苯并-15-冠-5后,加入4.2ml三乙胺。在N_2保护和激烈搅拌下,滴加3.09g(9.52M)N-对甲苯磺酰
Trace potassium spectrophotometric determination, due to the reference crown ether compounds made great progress. In this paper, a new double crown ether was synthesized. The optimum conditions of extraction and determination of potassium, the influence of coexisting ions and the composition of the complex were discussed. The law applies to tap water, trace potassium in water. 1. Synthesis of Double Crown Ether (BC): After dissolving 5.42 g (19.2 M) of 4’-aminobenzo-15-crown-5 in 30 ml of anhydrous dioxane, 4.2 ml of triethylamine was added. Under N 2 protection and vigorous stirring, 3.09 g (9.52 M) of N-p-toluenesulfonyl was added dropwise