The mechanism of chelate and synergistic extraction of Pb++,Ni++,Mn++,Co++ Cd+++,Ca++, Mg++ and La+++ ions with l-phenyl-3-methyl-4-benzoyl-pyrazolone-5(HPZL)-benzene and HPZL-TBP-benzene solution were investigated by the two-phase titration method.

• 本文报导用两相滴定法研究HPZL和TBP的苯溶液对Pb~(++)、Ni~(++)、Mn~(++)、Co~(++)、Ca~(++)、Mg~(++)、Cd~(++)、La~(+++)诸离子的萃取和协同萃取机理得到的结果。