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迄今为止,常量铝的测定,仍以络合滴定法为主。近几年来,随着生产,科研的发展,铝的络合滴定又有了新进展。本文就截至1978年年底所收集的主要资料,作一简略介绍。一、滴定方式从滴定方式考虑,铝的络合滴定分直接滴定法,返滴定法与Sajo法,即氟化物释放法。 1.直接滴定法铝的直接滴定法应用不多,似是选择性不高,良好指示剂尚少,且在热溶液中易被破坏,终点时色泽变化不敏锐等所致。在直接滴定方案中,有两个方案较有价值。其一
So far, the determination of aluminum, still dominated by complexometric titration. In recent years, with the development of production and scientific research, new progress has been made in the complexation titration of aluminum. This article gives a brief introduction of the main data collected as of the end of 1978. First, the titration method Titration from the way to consider, aluminum complex titration points direct titration, back titration and Sajo method, the fluoride release method. 1. Direct titration Aluminum direct titration is not much used, it seems that the selectivity is not high, good indicator is still small, and easily damaged in hot solution, the end of the color change is not sensitive and so on. In the direct titration scheme, two programs are more valuable. One of them