Trace detection of Ce3+ by adsorption strip voltammetry at a carbon paste electrode modified with ion imprinted polymers
| Autor: | Jieren Xia, Qiue Cao, Huiping Bai, Jin Chen, Yan-Xiong Liu, Xiaolan Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Detection limit
chemistry.chemical_classification Ethylene glycol dimethacrylate Azobisisobutyronitrile 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Carbon paste electrode chemistry.chemical_compound chemistry Geochemistry and Petrology Adsorptive stripping voltammetry Precipitation polymerization 0210 nano-technology Voltammetry Nuclear chemistry |
| Zdroj: | Journal of Rare Earths. 36:1121-1126 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/j.jre.2018.03.014 |
| Popis: | To develop a convenient method for sensitive and selective determination of Ce3+ in aqueous phase with complicated matrices, a carbon paste electrode (CPE) modified with ion imprinted polymers (IIPs) were fabricated. The polymers were prepared by precipitation polymerization using Ce3+ as template, allyl phenoxyacetate (APA) as monomer, ethylene glycol dimethacrylate (EGDMA) as crosslinker and azobisisobutyronitrile (AIBN) as initiator under the molar ratio of Ce3+, APA and EGDMA as 1:4:40, respectively. Ce3+ was detected directly by differential pulse adsorptive stripping voltammetry (DPASV) and its oxidation peak appears at about 0.93 V. All parameters affecting the sensor's response are optimized and a calibration curve is plotted at a linear range of 1.0 × 10−6–1.0 × 10−5 mol/L and 1.0 × 10−5–2.0 × 10−4 mol/L with the detection limit of 1.5 × 10−7 mol/L. All other rare earth ions have no interference with the determination of Ce3+ even at a concentration 500 times higher than that of Ce3+. This sensor was successfully applied to determination of Ce3+ in two catalyst sample solutions with RSD≤3.3% (n = 5) and recoveries in the range of 99.2%–106.5% at our optimal conditions. |
| Databáze: | OpenAIRE |
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