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Citation: YE Min, ZHANG You-Yu, YANG Qin, ZHANG Yu-Qin, TAN Ping, YAO Shou-Zhuo. Fluorescence Quenching Method for the Determination of Manganese Ion with Cysteamine-capped-CdS Nanoparticles[J]. Chinese Journal of Applied Chemistry, ;2008, 25(5): 534-538. shu

Fluorescence Quenching Method for the Determination of Manganese Ion with Cysteamine-capped-CdS Nanoparticles

1.
MOE Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Hunan Normal University, Changsha 410081

Corresponding author: ZHANG You-Yu,
Received Date: 17 June 2007
Available Online: 18 October 2007
Fund Project: 国家自然科学基金项目(20675030) (20675030)教育部重点项目(207076) (207076)湖南省教育厅、科技厅项目(06A035,060223)资助 (06A035,060223)

Water-soluble Cysteamine-capped-CdS nanoparticles were prepared in aqueous solution at room temperature,and characterized by atomic force microscopy,scanning electron microscopy,Fourier transform infrared spectrometry,Ultraviolet-visible spectrometry,and spectrofluorimetry,respectively.A new approach was proposed for the sensitive determination of manganese ion with nanoparticles as the fluorescence probe.Different influencing factors were studied,including the concentration and pH of buffer,reaction time,and concentration of the nanoparticles.Under the optimum conditions,the response was linearly proportional to the concentration of manganese (Ⅱ) ion in a range of 0.053 40 mg/L to 77.62 mg/L.The detection limit was 0.016 78 mg/L for manganese (Ⅱ) ion.And it was proved to be a low-cost,simple,rapid,sensitive,low-limit method.Functionalized nanoparticles are hopeful to use as fluorescence probe in detecting trace elements in biological samples.
- CdS,
- nanoparticle,
- manganese ion,
- fluorescence quenching
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