Acta Chimica Sinica ›› 1980, Vol. 38 ›› Issue (4): 387-391. Previous Articles     Next Articles

库仑络合滴定 Ⅱ.微量锆的库仑络合滴定

莫金垣, 林植青   

  1. 中山大学化学系 广州
  • 收稿日期:1978-06-23 出版日期:1980-07-15 发布日期:2013-06-03

COULOMETRIC-COMPLEXOMETRIC TITRATION Ⅱ. COULOMETRIC-COMPLEXOMETRIC TITRATION OF MICRO AMOUNTS OF ZIRCONIUM

MO JIN-YUAN, LIN ZHI-QING   

  1. Chemistry Department, Sun Yat-sen University, Guangzhou
  • Received:1978-06-23 Online:1980-07-15 Published:2013-06-03

A method has been established for coulometric-complexometric titration of microgram quantities of zirconium with high selectivity.At pH 1.5-1.8 zirconium can displace the ferric ion from the Fe3+-EDTA complex.Then the released ferric ion was titrated with the electrogenerated Fe2+-EDTA from Fe3+-EDTA and a current density 135μA/cm2.The end point was detected spectrophotometrically with sulfosalicylic acid as indicator.Many metal ions, excopt bismuth (Ⅲ),did not interfere.The relative error is 0.1-0.5% for 3.6-45μg of zirconium.