An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples
Gouda, A., elsheikh, R., El Nabawy, K., Shaltout, M., El Sheikh, R. (2020). An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples. EKB Journal Management System, 2016(1), 1-10.
Ayman A Gouda; Ragaa elsheikh; Kamal El Nabawy; Mohammed Shaltout; Ragaa El Sheikh. "An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples". EKB Journal Management System, 2016, 1, 2020, 1-10.
Gouda, A., elsheikh, R., El Nabawy, K., Shaltout, M., El Sheikh, R. (2020). 'An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples', EKB Journal Management System, 2016(1), pp. 1-10.
Gouda, A., elsheikh, R., El Nabawy, K., Shaltout, M., El Sheikh, R. An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples. EKB Journal Management System, 2020; 2016(1): 1-10.

An environment-Friendly Cloud Point Extraction Method for preconcentration and determination of Lead and Cadmium in Water Samples

Bulletin of Faculty of Science, Zagazig University
Article 3, Volume 2016, Issue 1, 2020, Page 1-10  XML PDF (394.04 K)
Document Type: Original Article
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Authors
Ayman A Gouda email 1; Ragaa elsheikh2; Kamal El Nabawy3; Mohammed Shaltout3; Ragaa El Sheikh4
1Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt
2Chemistry Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
3Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
4Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt.
Abstract
A new, cost-effective, and environmental-friendly cloud point extraction methodology was described for enrichment of lead and cadmium in real water samples. The method involves the complexation of lead or cadmium with 2-nitro-6-(1,3-thiazol-2-diazeyl)-phenol at pH 8.5 and 7.0 for cadmium and lead, respectively, then extraction into Triton X-114. After dilution of the surfactant-rich phase with acidified methanol, the enriched analytes concentration was estimated by spectrophtotmetric measurements at 590 and 540, respectively. Parameters that influenced cloud point extraction, such as pH, reagent, surfactant and nitric acid concentrations, centrifuge rate and time, temperature, incubation time, as well as interferences were evaluated and optimized. The preconcentration factor was 50 and the detection limits were 1.64 and 1.62 µg L-1 for lead and cadmium, respectively. The method presented relative standard deviation as precision were 2.28% and 1.96% for lead and cadmium, respectively. The accuracy of the new preconcentration procedure was checked by the analysis of the standard reference materials, and successfully applied to determine lead and cadmium in real water samples with relative recovery values in the range of 95.40%–101% for the spiked samples.
Keywords
Cloud point extraction; Lead; cadmium; Spectrophotometry; Real water samples
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