سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۶

نویسنده(ها):

h Zamani – Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran
h Faghihian – Department of Chemistry, University of Isfahan, Isfahan, Iran.
a.m Haji shabani – Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran.
s Dadfarnia – Department of Chemistry, Faculty of Science, University of Yazd, Yazd, Iran.

چکیده:

A solid phase extraction system for separation and preconcentration of trace amounts of Pb(II), Ni(II),
Cd(II) and Cu(II) is proposed. The procedure is based on the adsorption of Pb2+, Ni2+, Cd2+ and Cu2+ ions on
a column of 1-(2-pyridylazo)-2-naphthol (PAN) immobilized on surfactant-coated clinoptilolite prior to their
determinations by FAAS. The effective parameters including pH, sample volume, sample flow rate and
eluent flow rate were also studied. The analytes collected on the column were eluted with 5 mL of 1 mol L-1
nitric acid. A concentration factor of 180 can be achieved by passing 900 mL of sample through the column.
The method was applied to the determination of Pb, Ni, Cd and Cu in water samples.