导数极谱法测定矿石中微量铼

Derivative Polarographic Determination of Trace Re

矿石中铼的含量极微,近年来对铼的测定虽有报导,但方法灵敏度都不太高。本文根据在硫酸溶液中,高铼酸根离子可与碲酸产生一个极谱催化还原波。试验了在硫酸、EDTA、聚乙烯醇体系中,加入适量二苯胍,使铼的催化波提高。

The polarographic catalytic reductive wave produced by rhenate ion and telluric acid is raised by the addition of a suitable amount of diphnylguanidine into the sulfuric acid,EDTA,and polyvinyl alcohol system.The lowest detectable quantity for Re is 0.001μg/ml.A linear relationship between the peak height and the concentration holds in ranges 0.01-0.8μg and 0.5-6μg/10 ml Re.The method is simple,quick and with good stability.The RSD%is 6.06(n=10).It can be used for the determination of 0.00x-0.00000x%Rej in minerals.