%0 Journal Article
%T Cloud Point Extraction and Flame Atomic Absorption Spectrometric Determination of Lead, Cadmium and Palladium in Some Food and Biological Samples
%A M. Ghaedi
%A K. Niknam
%A M. Soylak
%J Pakistan Journal of Analytical and Environmental Chemistry
%D 2011
%I University of Sindh
%X The proposed method is based on the complexation of the Pb2+, Cd2+ and Pd2+ ions with 3-(1-(1-H-Indol-3-Yl)-3-phenylallyl)-1H-indole (IPAI) at pH 8.0 in the presence of Triton X-114. The phase separation occured when micellar solution was heated at 55  C. The surfactant-rich phase, diluted to 0.5 mL via 1.0 mol L 1 nitric acid in methanol was directly introduced into the nebulizer of the flame atomic absorption spectrometry (FAAS). Influence of variables such as pH, amount of ligand and Triton X-114, heating time and temperature were evaluated and optimized. The optimized enhancement factors for Pb2+, Cd2+ and Pd2+ ions were 22, 33 and 23, respectively and the detection limit (DLs) was between of 1.6¨C2.6 ¦ÌgL 1. The relative standard deviation (RSD) of each ion was found to be less than 4.6% at 100 ¦ÌgL 1. In addition, the calibration graphs were linear in the range of 0.01-0.22 ¦Ìg mL 1 for Cd2+ ion, 0.018-0.26 ¦Ìg mL 1 for Pb2+ ion and 0.02-0.27 ¦Ìg mL 1 for Pd2+ ion with the correlation coefficients in the range of 0.995¨C0.999.
%K Cloud point extraction
%K 3-(1-(1-H-Indol-3-Yl)-3-phenylallyl)-1H-indole
%K Atomic absorption spectrometry
%K Triton X-114
%K Trace metal ions
%U http://ceacsu.edu.pk/PDF%20file/Volume%2012%20No%201%20and%202/42-48.pdf