机构地区: 韶关学院化学与环境工程学院化学系
出 处: 《分析测试学报》 2004年第4期101-103,共3页
摘 要: 通过对In(Ⅲ)-5_Br_PADAP光度分析体系的研究,选择非离子型表面活性剂OP增加显色体系的稳定性。最大吸收波长λmax=565nm,表观摩尔吸光系数ε=7.54×104L·mol-1·cm-1,线性范围为0~0.48mg/L。采用甲苯-甲基异丁酮混合溶剂萃取,6mol/LHCl反萃取铟(Ⅲ),消除干扰离子的影响,在水相中测定In(Ⅲ),有效地提高了方法的选择性和准确度。本法应用于测定锌渣中微量铟,获得满意结果。 The photometric systemof In(Ⅲ)-5_Br_PADAP-OPwas studied.The nonionic surfactant OP was selected to improve its stability.The molar absorptivityεatλ 565nm was7.54×10 4 L·mol -1 ·cm -1 and the linear range of In was0~0.48mg/L.To improve the selectivity and accuracy of the method,In(Ⅲ)in sample was first extracted with a mixed solvent of toluene and methyl isobutyl ketone,then back extracted with6mol/L HCl to eliminate the interference ions,and determined in an aqueous phase.The proposed method was applied to the determination of trace Indium in Zinc slag samples with satisfactory results.