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苯骈噻唑偶氮8-羟基喹啉(BTAQ)作为镍的分析试剂,已有报导。最近,作者为了改善试剂的分析性能,在BTAQ分子中引入溴原子,合成了新显色剂。5-[6-溴-(2-苯骈噻唑)偶氮]-8-羟基喹啉(6-Br-BTAQ)。它是一种能与多种金属离子起灵敏反应的新试剂,已用于铁、铝合金中微量镍的测定。 本文详细研究了6-Br-BTAQ与锌的显色反应条件。加入非离子型表面活性剂聚乙烯醇溶液作增溶剂,在pH4.5～7.0范围内,锌与6-Br-BTAQ形成稳定的紫色络合物,
Benzothiazolylazo-8-hydroxyquinoline (BTAQ) has been reported as an analytical reagent for nickel. Recently, in order to improve the analytical performance of reagents, the authors introduced bromine atoms into the BTAQ molecule to synthesize a new chromogenic reagent. 5- [6-Bromo- (2-benzothiazole) azo] -8-hydroxyquinoline (6-Br-BTAQ). It is a new reagent that can react sensitively with various metal ions and has been used for the determination of trace nickel in iron and aluminum alloys. In this paper, the color reaction conditions of 6-Br-BTAQ with zinc were studied in detail. Adding non-ionic surfactant polyvinyl alcohol solution as a solubilizer to form a stable purple complex with 6-Br-BTAQ in the range of pH 4.5-7.0,