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Immobilized salen (N,N'-bis (salicylidene) ethylenediamine) as a complexing agent for on-line sorbent extraction/preconcentration and flow ... [An article from: Analytica Chimica Acta]
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This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The microcolumn of salen I (N,N'-bis (salicylidene) ethylenediamine) immobilized on surfactant-coated alumina has been used for on-line preconcentration of copper and lead with a flow injection-flame atomic absorption spectrometry (FI-AAS). Various parameters affecting the deposition/elution processes in the FI-AAS system was optimized. Deposition of analytes was affected at pH of ~9, and injection of nitric acid (250@ml 2moll^-^1) served to elute retained species to AAS. A good relative standard deviation of 4.5 and 3.8% at 30@mg l^-^1(n=7), high enrichment factors of 100 and 75, and detection limits of 0.3, 2.6@mgl^-^1 (3S) for Cu(II) and Pb(II) were obtained, respectively. The method was applied to water samples, multivitamin tablet and standard reference alloys (C12E41 and C12X3500) and accuracy was assessed through recovery experiment and independent analysis by furnace AAS, or comparing the results with the accepted values.
Description:
The microcolumn of salen I (N,N'-bis (salicylidene) ethylenediamine) immobilized on surfactant-coated alumina has been used for on-line preconcentration of copper and lead with a flow injection-flame atomic absorption spectrometry (FI-AAS). Various parameters affecting the deposition/elution processes in the FI-AAS system was optimized. Deposition of analytes was affected at pH of ~9, and injection of nitric acid (250@ml 2moll^-^1) served to elute retained species to AAS. A good relative standard deviation of 4.5 and 3.8% at 30@mg l^-^1(n=7), high enrichment factors of 100 and 75, and detection limits of 0.3, 2.6@mgl^-^1 (3S) for Cu(II) and Pb(II) were obtained, respectively. The method was applied to water samples, multivitamin tablet and standard reference alloys (C12E41 and C12X3500) and accuracy was assessed through recovery experiment and independent analysis by furnace AAS, or comparing the results with the accepted values.
