基性岩超基性岩中痕量铂的催化极谱测定  

CATALYTIC POLAROGRAPHIC DRTERMINATION OF TRACE AMOUNTS OF PLATINUM IN BASIC ROCKS AND ULTRABASIC ROCKS

作　　者：但德忠[1] 冯正光[1] 王磊[1] 

机构地区：[1]成都科技大学环境系,成都理工学院应化系

出　　处：《矿物岩石》1994年第3期96-99,共4页Mineralogy and Petrology

摘　　要：本文针对基性岩超基性岩中ＳｉＯ＿２，Ａｌ＿２Ｏ＿３，Ｆｅ＿２Ｏ＿３，ＭｇＯ，ＣａＯ等含量高的特点，确定了１ｍｏｌ／Ｌ盐酸—０．１ｇ／Ｌ硫酸肼—３×１０￣（－３）ｍｏｌ／Ｌ甲醛底液测定痕量铂的体系，通过控制温度与改进熔矿方法，增强了体系稳定性，消除了ＳｉＯ＿２等的干扰。用于铜镍矿、铬铁矿和硅酸盐管理样的测定，结果符合要求。A polarographic catalytic system for the determination of trace amounts of Pt has been established, which is suitable for high contents of SiO_2, Al_2O_3,Fe_2O_3, MgO, CaO to bsaic rocks and ultrabesic rocks. In a supporting electrolytes containing C(HCl)=1 mol/L HCl,0.1 g/L N_2H_4 . H_2SO_4, 3×10￣(-3) mol/L HCHO,a clear sensitive polarographic catalytic wave for Pt is ob-tained.The stability for the system in enhanced by controlling temperature. The interference can be overcome by improving the digest method of samples. The system has been used for the deter-mination of trace amounts of Pt in silicates, chromites and copper-nickles.

关 键 词：铂 极谱法 催化波 基性岩 超基性岩 

分 类 号：P588.124[天文地球—岩石学]