铝Ⅲ-4,5-二溴苯基荧光酮络合物吸附波的研究  

Study on the Polarographic Complex Adsorptive Wave of Aluminum(Ⅲ)-Dibromophenylfluorone

作　　者：温轲[1] 段德良[1] 王宅中[1] 尹海川[1] 

机构地区：[1]云南大学化学系,昆明650091

出　　处：《冶金分析》2000年第4期14-16,7,共4页Metallurgical Analysis

摘　　要：在 pH6 6的缓冲溶液中 ,Al -Br PF体系产生一明晰的阴极化极谱波 ,其二次导数波的峰电位为 - 0 88V(vs SCE) ,峰电流与铝浓度在 5 9× 1 0 - 9～ 4 1× 1 0 - 8mol/L范围内呈线性关系。研究了极谱电流的性质 ,认为获得的极谱波为络合物吸附波 ,相应络合物的组成为 [Al(Br PF) ],条件稳定常数 6 3× 1 0 7。并建立了测定微量铝的灵敏分析方法 ,应用于碳酸钠、锌合金和铁矿石样品中铝的测定 ,结果满意。The Al(Ⅲ)-Br PF system produces a distinct polarographic wave in the Clark-Lubs buffer solution of pH6.6. The peak potential of the second derivative wave is at -0.88V(vs.SCE). The linear relationship exists between the peak current and the concentration of Al(Ⅲ) over the range from 5.9×10 -9 to 4.1×10 -8 mol/L. It shows that the complex [Al(Br-PF)] has been formed in the given condition. Then the conditional stability constant of the complex is 6.3×10 7. The polarographic current property has been studied to confirm that the polarographic wave has an adsorptive character.

关 键 词：铝 二溴苯基荧光酮 络合物吸附波 研究 

分 类 号：O657.14[理学—分析化学]