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《Journal of Guangxi Normal University(Natural Science Edition)》 2016-01
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Determination of Trace Chromium(Ⅵ)by Carbon Nanoparticles Resonance Energy Transfer Rayleigh Scattering

LIU Qingye;WANG Hua;HUANG Danhua;HE Shihe;LI Jiao;LUO Junheng;ZHANG Xinghui;WEN Guiqing;LIANG Aihui;JIANG Zhiliang;University Key Laboratory of Karst Ecology and Environmental Change of Guangxi Province,Guangxi Normal University;College of Environment and Resource,Guangxi Normal University;  
In HAc-NaAc buffer solution containing phenanthroline(phen)as activator,cetyl trimethyl ammonium bromide(CTMAB)as a sensitizer and H_2O_2 as an oxidant,the carbon nanoparticles(CNPs)exhibited a strong SPR Rayleigh scattering peak at 423 nm.The receptor of ARS closed to the donor of CNPs with strong plasmon resonance(SPR)Rayleigh scattering(RS),the SPRRS-energy transfer(SPRRS-ET)take place,that caused the peak at 423 nm decreased,owing to the overlapping of CNPs RRS and ARS absorption spectra.The Cr(Ⅵ)exhibited strong catalytic effect on the slow reaction of ARS-H_2O_2,when the concentration of Cr(Ⅵ)increased,the concentration of ARS decreased,and the amount of SPRRS-ET decreased,as a result,the RS intensity at 423 nm increased linearly.thus,the analytical method was established for determination of trace Cr(Ⅵ).The increased intensity ΔI423nmwas linear to the Cr(Ⅵ)concentration in the range of 0.004~0.16 mg/L,with a regression equation ofΔI423nm= 49 442C+65.1,and a detection limit of 8.0μg/L Cr(Ⅵ).The SPRRS-ET assay was applied to the analysis of Cr(Ⅵ)in environmental water,with a satisfactory result.
【Fund】: 国家自然科学基金资助项目(21447006 21567005 21267004 21367005 21307017 21365011 21467001 21477025 21465006);; 广西自然科学基金资助项目(2013GXNSFFA019003 2014GXNSFAA118050);; 广西高等学校科研项目(2013YB035);; 2015年度国家级大学生创新创业训练计划项目资助;; 岩溶生态与环境变化研究广西高校重点实验室主任基金(YRHJ15Z011)
【CateGory Index】: X830;O657.3
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