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Synthesis of the New Reagent 1-azobenzene-3-(5- cyano -2-pyridyl)-triazene and Its Color Reaction with Zinc
Author(s): 
Pages: 30-33
Year: Issue:  5
Journal: GUANGDONG TRACE ELEMENTS SCIENCE

Keyword:  1-偶氮苯-3-(5-氰-2-吡啶)-三氮烯显色反应;
Abstract: 报道了新显色剂1-偶氮苯 -3-(5-氰-2-吡啶)- 三氮烯的合成.在pH 10~12 的硼砂 - 氢氧化钠缓冲溶液中,NP-40 表面活性剂存在下,该试剂与锌发生显色反应,生成3∶1的红色配合物.配合物的最大吸收峰位于530 nm,表观摩尔吸光系数为 1.52×105 L·mol- 1·cm- 1.Zn2+质量浓度在 0~0.48 mg/L 范围内遵守比尔定律.用该法测定人发中微量锌,结果令人满意.
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