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1915年和1918年Tschitchibabin等人介绍了一些邻羟基偶氮化合物的合成方法,1915年又发现这些染料中之PAN[1-(2-吡啶偶氮)-β-萘酚]能与许多重金属离子形成螯合物并研究了它应用于分析的可能性。近年来,已合成了许多吡啶偶氮酚衍生物,并已用于分析工作,如PAN、PAR均为灵敏度高、选择性好的特效试剂。 1962年川濑开始将吡啶环改为噻唑环合成了二十余种噻唑偶氮酚衍生物,继之就扩大了这些化合物的分析应用范围。实验
In 1915 and 1918, Tschitchibabin et al. Introduced the synthesis of some o-hydroxyazo compounds. In 1915, they also found that PAN [1- (2-pyridylazo) -β-naphthol] in these dyes interacts with many heavy metal ions The chelate was formed and the possibility of its application to analysis was studied. In recent years, many pyridinium azo phenol derivatives have been synthesized and have been used in analytical work, such as PAN and PAR are special reagents with high sensitivity and good selectivity. In 1962 Kawase began to pyridine ring to thiazole ring synthesis of more than twenty kinds of thiazole azo phenol derivatives, followed by the expansion of the analysis of the scope of the application of these compounds. experiment