Preconcentration and determination of trace heavy metals in water using a membrane disk and FAAS

Preconcentration and determination of trace amounts of heavy metals in water samples using membrane disk and flame atomic absorption spectrometry

Chinese Journal of Chemistry 2007, 25, 640-644
Moghimi Ali

Abstract: A fast and simple method for preconcentration of Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cu²⁺ and Co²⁺ 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 Ni²⁺, Cd²⁺, Pb²⁺, Zn²⁺, Cu²⁺ and Co²⁺ 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.

• This paper is free to view to spectroscopyNOW registered users until the end of July 2007. After this time it will be available via Wiley's Pay-Per-View service for US$25.
• Click here to access the abstract of this paper. From here you can progress to read the full paper.
• Click here for more details about Chinese Journal of Chemistry