前言乙二醛缩-双(2-羟基苯胺),简称GBHA,是一种席夫碱。它与二水杨醛缩乙二胺(DSEA)在结构上有明显的相似性。1957年,Bayer首先合成了GBHA,并对它与一系列重金属离子的反应进行了系统的研究。作者指出,试剂与Cu~(2+)、UO_2~(2+)、Ni~(2+)、Go~(2+)、Mn~(2+)、Zn~(2+)、Cd~(2+) 等离子能生成深色的络合物,它们的稳定性虽不如DSEA的相应络合物,但选择性却优于后者。 Preface Glyoxal-bis (2-hydroxyaniline), referred to as GBHA, is a Schiff base. It has obvious structural similarities with salicylaldaldehyde ethylenediamine (DSEA). In 1957, Bayer first synthesized GBHA and systematically studied its reaction with a series of heavy metal ions. The authors point out that there is no significant difference between the reagent and Cu2 +, UO2-2 +, Ni2 +, Go2 +, Mn2 +, Zn2 +, Cd ~ (-), 2+) plasma can generate dark complex, their stability is not as good as the corresponding complexes of DSEA, but the selectivity is better than the latter.