单扫描示波极谱法测定矿石中微量铼

DETERMINATION OF TRACE RHENIUM IN ORES BY SINGLE-SWEEP OSCILLOPOLAROGRAPHY

在单扫描示波极谱法测定矿石中微量铼的硫酸-硫酸钠-碲-二苯胍-聚乙烯醇体系中,最佳测试条件为10ml体积中含有硫酸(1+1)4.5ml,硫酸钠0.2g,硫酸羟胺0.1g,VC0.14g,碲2.0μg,0.1％二苯胍0.5ml,0.1％聚乙烯醇0.2ml。使用单扫描示波极谱仪阴极化导数部分,铼在-0.78V(银片为参比电极)能产生波形清晰、重现性好的极谱催化波。在0.001—1μg/ml范围内铼的浓度与渡高呈良好的线性关系。方法的检出限为0.015μg/g。方法简便、灵敏、稳定性好,适宜于矿石中微量铼的测定。

A system of H_2SO_4-Na_2SO_4-Te-diphenyl guanidine-polyvinyl alcohol has been developed to determine microamounts of rhenium in ores by single-sweep oscillopolarography, which the optimum determination condition of the sysem is composed of (in 10ml solution) H_2SO_4(1+1) 4.5ml, Na_2SO_4 0.2g, hydroxylamine sulphate 0.1g, VC 0.14g, Te 2.0μg, diphenyl guanidine (0.1％) 0.5ml, polyvinyl alcohol (0.1％) 0.2ml. Rhenium produced a clear and well reproductive catalytic wave at—0.78V (vs. silver). In the range of 0.001-1μg/ml, the concentration of rhenium has a linear relationship with waveheight. The detection limit is 0.015μg/g. This method proved convenient, sensitive and of good stability.