Solid phase extraction preconcentration of lead ion with a chiral N-isoleucine phthalimide by atomic absorption spectrometry

A selective, sensitive and efficient method for preconcentration of trace amounts of lead ion by incorporationof modified nano-silica withN-isoleucine phthalimideas a new ligand has been reported.The absorbed lead ion was elutedwith concentrated nitric acid and measured by flame atomic absorption spectrometry. Analytical influencing parametersincluding, pH value,ligand and SDS amount,solid phase amount,eluting solution(type and concentration), nano-silicaamount recoveries were investigated.The method has high sorption-preconcentration efficiency even in the presence ofvarious interfering ions with recoveries more than 99%, especially for water sample analysis.

کلیدواژه ها:

Preconcentration ، Modified nano-silica ، Flame atomic absorption spectrometric ، lead ion