Resumo

TEWARI, B. B. STUDIES ON COMPLEXATION IN SOLUTION WITH A PAPER ELECTROPHORETIC TECHNIQUE [THE SYSTEM MERCURY(II)/NICKEL(II)/ LEAD(II) - SARCOSINE]. J. Chil. Chem. Soc. [online]. 2012, vol.57, n.1, pp. 995-998. ISSN 0717-9707.  doi: 10.4067/S0717-97072012000100009.

Complexation reactions of sarcosine with mercury(II), nickel(II) and lead(II) have been studied in the solution phase using a paper ionophoretic technique. This method is based on movement of a spot of metal ion in an electric field at various pHs of background electrolyte. A graph of pH versus mobility was used to obtain information on the metal complexes and to calculate stability constants. The stability constants of the ML⁺ and ML₂ complexes of mercury(II), nickel(II) and lead(II) - sarcosine have been found to be (7.95 ± 0.02; 6.79 ± 0.06), (6.69 ± 0.01; 5.29 ± 0.04) and (4.34 ± 0.02; 2.69 ± 0.07) (logarithm stability constant values), respectively at a temperature of 35 ° C and ionic strength of 0.1 M.

Palavras-chave : Paper electrophoretic technique; mercury(II) complexes; nickel(II) complexes; lead(II) complexes; sarcosine; stability constant.