Aspartate and Glutamate as ligand towards lead(II).

The complexs formation between lead(II) and aspartate or glutamate has bees studied by measuring the electromotive force of galvanic cells containing glass and stationary diluited amalgam electrodes at 25°C and in 1.00M NaClO4. Experimental data have been explained by assuming the presence of species PbL, PbHL, PbH2L, PbL2,PbH2L2; PbH3L2 and PbH4L2 where L indicates aspartate or glutamate. The stability constants of each complex have been determined showing that protonated species prevail in a wide range of coincentration of reagents. Results have been compared with those obtained for glycine and serine