【摘要】 研究了在阳离子表面活性剂溴化十六烷基三甲铵(CTMAB)存在下,2,3,7 三羟基 9 (4,5 二溴 邻硝基)苯基荧光酮(DBONPF)与钨(Ⅵ)的显色反应及光度性能。在0.4mol LH2SO4介质中,试剂与钨(Ⅵ)形成化学计量比为2∶1的红色络合物,其最大吸收峰位于547nm波长处,表观摩尔吸光系数为5.64×105L·mol-1·cm-1,检出限为4.12μg L,钨质量浓度在0～500μg L范围内符合比尔定律,分析方法可用于钢样中微量钨的测定。更多还原

【Abstract】 In the presence of cationic surfactant CTMAB,the color reaction and photometric properties of 2,3,7-trihydroxy-9-（4,5-dibromo-o-nitro）phenylfluorone（DBONPF） with （tungsten（Ⅵ）） were studied. In 0.4 mol/L of H₂SO₄ medium, DBONPF reacts with （tungsten（Ⅵ）） form a red complex with stoichiometric ratio of 2∶1, a maximum absorption at 547 nm and an apparent molar absorptivity of 5.64×10⁵L·mol^-1·cm^-1, and the detection limit is 4.12 μg/L. The Beer law was obeyed in the range of 0～500 μg/L tungsten（Ⅵ）. The method has been applied to the determination of tungsten in steel samples.更多还原