%0 Journal Article
%T Flame Atomic Absorption Spectrometric Determination of Trace Lead after Solid-Liquid Extraction and Preconcentration Using 1-(2-Pyridylazo)-2-naphthol
%A Ali Taher
%A Mohammad
%J -
%D 2003
%X Sa£¿etak An atomic absorption spectrometric method for the determination of trace amounts of lead after adsorption of its 1-(2-pyridylazo)-2-naphthol (PAN) complex on microcrystalline naphthalene has been developed. This complex was adsorbed on microcrystalline naphthalene in the pH range 8.4¨C11.5 from large volumes of aqueous solutions of various alloys and biological samples. After filtration, the solid mass consisting of the complex and naphthalene was dissolved with 5 ml of dimethylformamide and the metal was determined by flame atomic absorption spectrometry. Lead was alternatively quantitatively adsorbed on [1-(2-pyridylazo)-2-naphthol]- naphthalene adsorbent packed in a column and determined similarly. In this case, 0.5 ¦Ìg of lead was concentrated in a column from 500 ml of aqueous sample, where its concentration was as low as 1.0 ng ml¨C1. Eight replicate determinations of 4.0 ¦Ìg ml¨C1 of lead gave a mean absorbance of 0.200 with a relative standard deviation of 1.5 %. The sensitivity for 1 % absorption was 88 ng ml¨C1. The interference of a large number of anions and cations was studied and the optimized conditions developed were utilized for the trace determination of lead in various standard samples
%K 1-(2-pyridylazo)-2-naphthol
%K naphthalene
%K adsorbent
%K Pb (lead)
%K flame atomic absorption spectrometry
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=151749