%0 Journal Article
%T Determination of lead in the Parana River by solid phase spectrophotometry
%A Pellerano
%A R.G.
%A Romero
%A C.H
%A Acevedo
%A H.A
%A Vazquez
%A F.A
%A Marchevsky
%A E
%J Anales de la Asociaci£¿3n Qu£¿-mica Argentina
%D 2006
%I Scientific Electronic Library Online
%X the paper proposes a procedure for determination of lead in water samples by solid phase spectrophotometry (sps). it is based on the reaction of pb(ii) ion with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (5-br-padap) immobilized on an anion-exchange resin, that gives rise to a coloured complex, whose absorbance is measured directly at the solid phase. the method provides a detection limit of 2.4 ¦̀g l-1 and a sample throughput of 2 h-1. the relative standard deviation (r.s.d.) was 1.7% for a pb(ii) concentration of 10.0 ¦̀g l-1. the calibration graph obtained was linear with a correlation coefficient of 0.9995, in the range from the detection limit up to at least 100 ¦̀g l-1. this method was successfully applied to the determination of pb(ii) in natural superficial waters from the parana river in argentina.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S0365-03752006000200008&lng=en&nrm=iso&tlng=en