The influence of some precipitating and complexing agents on the function of Pb(II)-sensitive electrode was studied. On the basis of the experimental findings, procedures were worked out for determining oxalate, phosphate, chromate, nitrilotriacetic acid (NTA), sodium diethyldithiocarbamate (NaDDC), and diethylenetetraamine penta-acetic acid (DTPA) with a standard Pb(II) solution as a titrant and a Pb(II), -sensitive electrode as a detector. The reverse titration of Pb(II), with any of these agents could also be done.