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Reference type: Journal
Authors: Darroudi A, Arbab Zavar Mh, Chamsaz M, Zohuri G, Ashraf N
Article Title: Ion-imprinted polymer mini-column for on-line preconcentration of thallium(III) and its determination by flame atomic absorption spectrometry.
Publication date: 2012
Journal: Analytical Methods
Volume: 4
Issue: (11)
Page numbers: 3798-3803.
DOI: 10.1039/C2AY25765C

Abstract: In the present work, a ''mini-column'' solid-phase extraction system using thallium(III) ion-imprinted polymer particles has been developed both to preconcentrate and determine thallium(III) ions using on-line flame atomic absorption spectrometry in aqueous solutions. The mini-column was fabricated using a Pyrex glass tube (7 cm length and 3 mm internal diameter) containing 500 mg of thallium(III) ion-imprinted polymer particles. The effects of different parameters such as pH, sample flow rate and also the nature and flow rate of eluent, on the extraction process, were thoroughly studied. Under the optimized conditions, the detection limit was found to be 1.5 ng mL-1. The relative standard deviation for five replicate analyses of 30 ng mL-1 of thallium(III) was 2.1%. The method was applied in the determination of thallium in a certified reference material and spiked tap water to demonstrate the accuracy, relative recovery and applicability of the presented method. The proposed technique is simple, convenient, selective and efficient. The enrichment factor was calculated to be 125
Template and target information: thallium ions, Tl(III)

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