Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/2130
Title: Design of two-dimensional biomimetic uranyl optrode and its application to the analysis of natural waters
Authors: James, D
Mary Gladis, J
Pandey, A K
Naidu, G R K
Prasada Rao, T
Keywords: Two-dimensional sensor
Optrode
Uranium
Determination
Solid phase extraction
Ion imprinted polymer
Molecularly imprinted polymers
Heavy-metal ions
Optical sensors
Preconcentration
Uranium
Recognition
Issue Date: 2008
Publisher: Elsevier
Citation: Talanta 74(5):1420-1427;15 Feb 2008
Abstract: A two-dimensional biomimetic optrode for the detection and quantification of uranium in natural waters was fabricated. The sensing element was designed by the inclusion of uranyl ion imprinted polymer particles into polymethyl methacrylate followed by casting a thin film on a glass slide without any plasticizer. The ion imprinted polymer material was prepared via covalent immobilization of the newly synthesised ligand 4-vinyl phenylazo-2-naphthol by thermal polymerization. Operational parameters such as pH, response time and the amount of sensing material were optimized. The response characteristics of the imprinted and the corresponding non-imprinted polymer inclusion optrodes of uranium were compared under optimum conditions. The imprinted polymer inclusion optrode responds linearly to uranium in the concentration range 0-1.0 mu g mL(-1) with a detection limit of 0.18 mu g mL(-1), which is much better than the solution studies using 4-vinyl phenylazo-2-naphthol (1.5 mu g mL(-1)). Triplicate determinations of 100 mu g of uranium(VI) present in 250 mL of solution gave a mean absorbance of 0.018 with a relative standard deviation of 8.33%. The superior sensitivity of imprinted polymer inclusion optrode is exemplified by lower detection limits and broader dynamic range over non-imprinted polymer inclusion optrode. The developed imprinted polymer inclusion optrode was found to give stable and precise response for 3 months and can be used without any loss in sensitivity. The applicability for analysing ground, lake and tap-water samples collected in the vicinity of uranium deposits was successfully demonstrated.
URI: http://ir.niist.res.in:8080/jspui/handle/123456789/2130
ISSN: 0039-9140
Appears in Collections:2008

Files in This Item:
File Description SizeFormat 
2008_0167.pdf
  Restricted Access
463.24 kBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.