【摘要】 铌—水杨基萤光酮—溴化十六烷基吡啶络合物，在０．１２～０．３２ｍｏｌ／Ｌ硫酸介质中，最大吸收波长为５２０ｎｍ，摩尔吸光系数为１．３×１０－５，稳定时间为２ｈ。在硫脲存在下，络合物可稳定２０ｈ不变。五氧化二铌含量在０～５μｇ／２５ｍＬ内，符合比尔定更多还原

【Abstract】 When Niobium-sulicylfluoronc-cetylpyridine bromide was in 0 12～0 32 mol/L sulfuric acid, maximum absorption wavelength of the complex was 520 nm,its apparent molar absorptivity was 1 3×10 -5 ,its settle time was 2h In the presence of thiourea,this complex could settle for 20 h In the range of 0～5 μg/25mL for Niobium oxide,Beer’s law was obeyed更多还原