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Reference type: Journal
Authors: Bai HP, Wang CQ, Zhang KN, Ding ZT, Cao Q
Article Title: A novel ion-imprinted electrode prepared by in situ polymerization for detection of platinum.
Publication date: 2014
Journal: RSC Advances
Volume: 4
Issue: (103)
Page numbers: 58916-58923.
DOI: 10.1039/C4RA08091B

Abstract: To develop a convenient method for sensitive and selective determination of platinum in complicated matrices, an ion-imprinted electrode was studied by in situ polymerization of Pt(IV) ion-imprinted membranes (Pt(IV)-IIMs) on the surface of a glassy carbon electrode (GCE). After the experimental parameters for the preparation of Pt(IV)-IIMs such as functional monomer, molar ratio of template, monomer and cross-linking agent together with extraction condition were optimized, an electrode with good regeneration, high stability and specific recognition to Pt(IV) was obtained by modifying GCE with Pt(IV)-IIMs prepared in acetonitrile using allylurea (NAU) as functional monomer, ethylene glycol dimethacrylate (EGDMA) as cross-linking agent, azobisisobutyronitrile (AIBN) as initiator under the molar ratio of template (H2PtCl6), NAU and EGDMA as 1 : 4 : 40. The resulting electrode named as Pt(IV)-IIMs/GCE exhibits high response sensitivity to Pt(IV) in phosphate buffer (pH 5.29). The calibration graph for the determination of Pt(IV) by Pt(IV)-IIMs/GCE is linear in the range of 2.0 x 10-8 ~ 2.5 x 10-4 mol L-1 with a detection limit of 4.0 x 10-9 mol L-1. No metal ions tested at a concentration 25 times higher than that of Pt(IV) interfered in the determination. The electrode was successfully applied to determine platinum in catalyst and plant samples with a relative standard deviation (RSD) of less than 3.0% (n = 5) and recoveries in the range of 97.8-103.6%
Template and target information: platinum ion, Pt(IV)


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