Preparation of Functionalized Hollow ZnS Microspheres and their Analytical Application

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Hollow ZnS microsphere were prepared by hydrothermal method and modified with L-Cysteine. The functionalized hollow ZnS microspheres were characterized using transmission electron microscopy(TEM), field-emission scanning electron microscopy(FESEM), X-ray diffractometer (XRD) and photoluminescence spectroscopy. They were used as fluorescence probes in the determination of ciprofloxacin. The pH value of the system was selected at pH 8.5 with excitation and emission wavelength at 270 nm and 423 nm. Under the optimum conditions, the fluorescence of hollow functionalized ZnS microspheres was enhanced by ciprofloxacin. The responses are linearly proportional to the concentrations of ciprofloxacin, the linear range of calibration curve is 0.20 µg•L-1–870 µg•L-1 for ciprofloxacin, the detection limit is 0.06 µg•L-1.

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281-285

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January 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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