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Studies on Complex Composition between Iron and 3-(6-Bromine Benzothiazole-2-Matenitrogen)-2,6-Two Hydroxyl Benzoic Acid
Author(s): 
Pages: 54-58
Year: Issue:  1
Journal: Guangdong Trace Elements Science

Keyword:  3-(6-溴苯并噻唑-2-偶氮)-26-二羟基苯甲酸(BTAB) 配合物组成;
Abstract: 研究了3-(6-溴苯并噻唑-2-偶氮)-2,6-二羟基苯甲酸(简称BTAB)与铁的配合反应。用摩尔比法、等摩尔连续变化法、平衡移动法和双峰双波长法四种方法详细研究并测定了3-(6-溴苯并噻唑-2-偶氮)-2,6-二羟基苯甲酸与铁显色形成配合物的配合比和稳定常数,建立了光度法测定铁的新方法。结果表明,在溴代十六烷基吡啶溶液存在下,铁与显色剂在pH 6.2的磷酸盐缓冲体系中形成1∶2的红色配合物,稳定常数为5.10×109。
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