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Issue 103, 2014
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A novel ion-imprinted electrode prepared by in situ polymerization for detection of platinum

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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 × 10−8 ∼ 2.5 × 10−4 mol L−1 with a detection limit of 4.0 × 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%.

Graphical abstract: A novel ion-imprinted electrode prepared by in situ polymerization for detection of platinum

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Publication details

The article was received on 04 Aug 2014, accepted on 03 Nov 2014 and first published on 03 Nov 2014


Article type: Paper
DOI: 10.1039/C4RA08091B
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Citation: RSC Adv., 2014,4, 58916-58923
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    A novel ion-imprinted electrode prepared by in situ polymerization for detection of platinum

    H. Bai, C. Wang, K. Zhang, Z. Ding and Q. Cao, RSC Adv., 2014, 4, 58916
    DOI: 10.1039/C4RA08091B

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