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Preconcentration and Determination of Trace Amounts of Heavy Metals in Water Samples Using Membrane Disk and Flame Atomic Absorption Spectrometry
Author(s) -
Ali Moghimi
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790119
Subject(s) - chemistry , sodium diethyldithiocarbamate , detection limit , metal ions in aqueous solution , elution , metal , atomic absorption spectroscopy , adsorption , extraction (chemistry) , trace amounts , analytical chemistry (journal) , column chromatography , ion , chromatography , nuclear chemistry , inorganic chemistry , medicine , physics , alternative medicine , organic chemistry , quantum mechanics , pathology
A fast and simple method for preconcentration of Ni 2+ , Cd 2+ , Pb 2+ , Zn 2+ , Cu 2+ and Co 2+ from natural water samples was developed. The metal ions were complexed with sodium diethyldithiocarbamate (Na‐DDTC), then adsorbed onto octadecyl silica membrane disk, recovered and determined by FAAS. Extraction efficiency, influence of sample volume and eluent flow rates, effects of pH, amount of Na‐DDTC, nature and amount of eluent for elution of metal ions from membrane disk, break through volume and limit of detection have been evaluated. The effect of foreign ions on the percent recovery of heavy metal ions has also been studied. The limit of detection of the proposed method for Ni 2+ , Cd 2+ , Pb 2+ , Zn 2+ , Cu 2+ and Co 2+ was found to be 2.03, 0.47, 3.13, 0.44, 1.24 and 2.05 ng·mL −1 , respectively. The proposed (DDTC) method has been successfully applied to the recovery and determination of heavy metal ions in different water samples.