Size dependent active effect of CdTe quantum dots on pyrogallol-H2O2 chemiluminescence system for chromium(III) detection
作者： Shamsa Kanwal , Xiaohong Fu , Xingguang Su
DOI: 10.1007/S00604-010-0334-0
关键词:
摘要: Water-soluble CdTe quantum-dots (QDs) of different sizes and capped with mercaptosuccinic acid were prepared by the microwave irradiation method. The QDs can significantly enhance chemiluminescence (CL) pyrogallol-H2O2 system. Those a diameter 3.8 nm produce most intense CL. UV-vis, photoluminescence, CL spectra acquired in order to explore effect. results showed that chromium(III) ion concentration range from 20 pM 30 µM enhances CL, this is exploited for its trace determination.The limit detection (3σ) 6 pM, relative standard deviation (n = 11) 1.7%. A continuous flow injection method was developed applied determination tap water lake samples satisfactory results.
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