PbO_2电极在库仑分析中应用的研究

按照PbO_2电极具有高的氧化电位和氧析出超电位,我们研究了以PbO_2代替pt作阳极的可能性.在硫酸介质中,将其用于屯生Co~(3+)、Ce~(4+)、MnO_4~-等强制氧化荆,恒电流库仑法滴定Fe~(2+)、Ti~(3+)、C_2O_4~(2-)等离子,在选定的条件下电流效率可达100%。方法用于硫酸中微量铁的测定。

APPLICATION OF A LEAD DIOXIDE ELECTRODE IN COULOMETRIC ANALYSIS

Out of consideration of the PbO_2 electrode having higher oxidation potential and evolution of oxigen overpotential, We have studied the possibility of using PbO_2 instead of Pt as acting anode. It has been applied to generating the strong oxidizing agent such as Co~(3+), Ce~(4+), MnO_4~- et. Ions in sulfuric acid medium. Under the selected conditions, 100% current efficiency can be obtained when Fe~(+2), Ti~(3+), C_2O_4~(2-) et. tirated by coulometric titration with constant current. It may also be applied to determinating microamounts iron in sulfuric acid.