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A novel method for the simple and simultaneous preconcentration of Pb2+, Cu2+ and Zn2+ ions with aid of diethylenetriamine functionalized SBA-15 nanoporous silica compound

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A rapid method for the extraction and monitoring of nanogram level of Pb2+, Cu2+ and Zn2+ ions using uniform silanized mesopor (SBA-15) functionalized with diethylenetriamine groups and flame atomic absorption spectrometry (FAAS) is presented. The preconcentration factor of the method is 100 and detection limit of the technique is 5.5 ng mL−1 and 1.4 ng mL−1 and 0.1 ng mL−1 for Pb2+, Cu2+ and Zn2+ respectively. The time and the optimum amount of the sorbent, pH and minimum amount of acid for stripping of ions from functionalized SBA-15 were tested. The maximum capacity the functionalized SBA-15 was found to be 183.0 (±1.9) µg, 156.0 (±1.5) µg and 80.0 (±1.6) µg of Pb2+, Cu2+ and Zn2+/mg functionalized SBA-15, respectively.
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Keywords: Cu2+ and Zn2+ ions; Pb2+; diethylenetriamine functionalized SBA-15; flame atomic absorption spectrometry; preconcentration

Document Type: Research Article

Affiliations: 1: Department of Chemistry,Faculty of Science, Islamic Azad University, Shahre Rey Branch, Km 5, Tehran- Ghome freewayTehran, Iran 2: Center of Excellence in Electrochemistry, School of Chemistry,College of Science, University of Tehran, Tehran, Iran 3: Department of Chemistry,Alzahra University, Tehran, Iran

Publication date: October 15, 2012

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