期刊
MICROCHIMICA ACTA
卷 180, 期 3-4, 页码 243-252出版社
SPRINGER WIEN
DOI: 10.1007/s00604-012-0927-x
关键词
Ion imprinted polymers; Nanobeads; Cs+ ion; Dibenzo-24-crown-8 ether; Flame photometry
We report on the synthesis of cesium ion-imprinted polymer nanoparticles that were prepared by a precipitation polymerization strategy using dibenzo-24-crown-8 ether as a selective crown ether, methacrylic acid as the functional monomer, ethyleneglycol dimethacrylate as the crosslinker, and AIBN as the radical initiator. The prepared sorbents have a diameter of 50-90 nm and display highly selective binding capability for Cs(I) ion, with rapid adsorption and desorption. The maximum adsorption capacity is 50 mg g(-1), and the preconcentration factor is around 100 at pH 9.0. Cesium ion was then determined by flame photometry with a detection limit (3 sigma) of 0.7 ng mL(-1) and with a standard deviation of 0.9 %.
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