Octadecyl Silica Membrane Disks Modified with a New Schiff's Base for the Preconcentration of Lead and Copper before Their Determination in Water Samples
✍ Scribed by Mohammad Reza Ganjali; Mohammad Reza Pourjavid; Leila Hajiagha Babaei; Masoud Salavati-Niasari
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 101 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0003-4592
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✦ Synopsis
Abstract
A simple and fast method for the extraction and determination of ppt level of Pb^2+^ and Cu^2+^ ions using octadecyl‐bonded silica membrane disks modified by a new tetradentates Schiff's base Bis(2, 4‐dimethoxy benzaldehyde) ethylen diimine and inductively coupled plasma atomic emission spectrometry is described. Extraction efficiency, and influence of flow rate, pH, type and the least amount of acid for stripping of Cu^2+^ and Pb^2+^ from the modified disks and break through volume were evaluated. The maximum capacity of the membrane disks modified by 5 mg of TDSB used was found to be 347±7 and 470±6 μg of copper and lead, respectively. The concentration factor is 500 (for 2500 mL water sample and flow rate of 20 mL min^‐1^) and detection limit of the proposed method is 12.5 and 150.5 pg/ml for Cu^2+^and Pb^2+^, respectively. The method was applied to the determination of Cu^2+^ and Pb^2+^ ions from various water, wastewater, black tea, and hot pepper samples.