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噻唑基偶氮染料最早是用作纤维染色的杂环染料,后来分析化学工作者才将其用作络合滴定的金属指示剂和吸收光谱测定法中的阳离子试剂。例如,有人研究了用2-(2′-噻唑偶氮)-5′-二乙氨基酚(TAE)测定痕量钒,认为用 TAE 测定痕量钒比二甲酚橙和1-(吡啶偶氮)-2′-萘酚(PAN)更快、更灵敏。此试剂及其类似物在铀、钪、铌的测定中也很灵敏。噻唑基偶氮染料,包括酚和萘酚衍生物,同2-氨基噻唑偶联成两大类化合物,其通式可以写成:1.酚类噻唑染料:
Thiazolyl azo dyes were first used as fiber dye heterocyclic dyes, and later analytical chemists only use it as a complexation titration metal indicator and absorption spectrometry cation reagent. For example, trace vanadium has been studied for the determination of trace vanadium using 2- (2’-thiazolylazo) -5’-diethylaminophenol (TAE), which is believed to be less toxic than xylenol orange and 1- Nitrogen) -2’-naphthol (PAN) is faster and more sensitive. This reagent and its analogues are also sensitive to the determination of uranium, scandium and niobium. Thiazolyl azo dyes, including phenols and naphthol derivatives, coupled with 2-aminothiazole into two major classes of compounds, the general formula can be written as: 1. Phenolic thiazole dyes: