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Rapped method for determination of lead in brine water samples by cloud point extraction prior to FAAS by using modifying agent

Author: 
Nadhum A.N. Awadand and Bassam A. R. Alabdul Aziz
Subject Area: 
Physical Sciences and Engineering
Abstract: 

A cloud point extraction (CPE) method was developed for the separation and preconcentration of trace amounts of lead using flame atomic absorption spectrometry (FAAS) to determine trace amounts of lead in brinewater. The method was depend on the formation of the hydrophobic complex between Pb(II) and sodium diethyldithiocarbamate (DDTC) followed by its extraction into a Triton X-114surfactant. The parameters such as effect of modifying agent, pH of sample, concentrations of DDTC and Triton X-114, equilibrium temperature, and equilibrium time, which affect both complexation and extraction, are optimized. Under the selected optimum conditions, and use of hydrazonium sulphate as matrix modifying agents enable us to develop the direct method for determination Pb in brine water. The accuracy of the method was batter than 95.3 % while the detection limit was found to be (0.0781µg/ml) for preconcentration of 1 ml sample for the determination of Pb(II) is obtained.

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