Triton X-100增敏光度法测定铝土矿中的微量钪  

Spectrophotometric determination of trace scandium in bauxite using the enhancing effect of triton X-100

作　　者：徐瑞银[1] 宋存义[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《分析试验室》2005年第2期35-37,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了在HCl溶液中微量钪(Ⅲ)-偶氮氯膦Ⅲ(CPAⅢ)之间的配合反应。结果表明,在0.5mol/LHCl溶液中和TritonX 100的存在下,有色溶液的最大吸收波长为680nm,表观摩尔吸光系数为2.62×104L·mol-1·cm-1。钪(Ⅲ)质量浓度在0～0.45mg/L范围内符合比耳定律,钪(Ⅲ)的加标回收率在98.0%～105.1%之间,RSD(n=6)为2.1%～2.6%。可用于铝土矿中的微量钪的测定。In HCl solution,the complex of Sc(Ⅲ) with chlorophosphonazo Ⅲ (CPAⅢ) has been studied. The results show that the maximun absorption of the color solution is at 680 nm and the apparent molar absorptivity is 2.62×10~4 L·mol^(-1)·cm^(-1) in 0.5 mol/L HCl solution and in the presence of Triton X-100. Beer′s law is obeyed for Sc(Ⅲ) in the range of 0～0.45 mg/L,and the recovery of Sc(Ⅲ) is 98.0%～105.1%,RSD(n=6) is 2.1%～2.6%. The method has been applied to the determination of trace Sc in Bauxite with satisfactory results.

关 键 词：钪 铝土矿 分光光度法 偶氮氯膦Ⅲ TRITON X-100 

分 类 号：O657.32[理学—分析化学]