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Science China Chemistry 2013年第12期56卷 1749-1756页

作者： LIN Qi LIN HongMei ZHANG YuanHui RONG MingCong KE HuiXian TANG XinHua CHEN Xi Key Lab of Global Change and Marine-Atmospheric Chemistry SOA Third Institute of Oceanography SOA Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen Standard Scientific Instrument Co. Ltd.

In this work,we reported a simultaneous determination approach for Pb(II),Cd(II)and Zn(II)atμg L 1concentration levels using differential pulse stripping voltammetry on a bismuth film electrode(BiFE).The BiFE could be prepared in situ when the sample solution contained a suitable amount of Bi(NO)3,and its analytical performance was evaluated for the simultaneous determination of Pb(II),Cd(II)and Zn(II)in *** determination limits were found to be 0.19μg L 1for Zn(II),and0.28μg L 1for Pb(II)and Cd(II),with a preconcentration time of 300 *** BiFE approach was successfully applied to determine Pb(II),Cd(II)and Zn(II)in tea leaf and infusion samples,and the results were in agreement with those obtained using an atomic absorption spectrometry *** Hg usage,the in situ preparation for BiFE supplied a green and acceptability sensitive method for the determination of the heavy metal ions.

关键词： bismuth film electrode differential pulse stripping voltammetry tea leaves tea infusion

Application of differential pulse stripping voltammetry and chemometrics for the determination of three antibiotic drugs in food samples

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Chinese Chemical Letters 2012年第3期23卷 339-342页

作者： Yong Sheng Zhong Yong Nian Ni Serge Kokot State Key Laboratory of Food Science and Technology Nanchang UniversityNanchang 330047China Department of Chemistry Nanchang UniversityNanchang 330031China Chemistry Faculty of Science and TechnologyQueensland University of TechnologyBrisbane 4001Australia

A reliable method for simultaneous determination of three antibiotic drugs（levofloxacin,gatifloxacin and lomefloxacin） by differential pulse stripping voltammetry（DPSV） in Britton-Robinson buffer（pH 7.96） was *** method is based on adsorptive accumulation of the antibacterial drugs on a hanging mercury dropping electrode（HMDE）,followed by the reduction of the adsorptive species by the technique of *** conditions,the deposition time of 80 s,the deposition potential of—1250 mV,and the scan rate of 25 mV/s,were *** linear concentration ranges of 0.010-0.080μg/mL were obtained for all these three antibiotic drugs,while the detection limits were 2.38,3.20 and 1.60ng/mL for levofloxacin,gatifloxacin and lomefloxacin,*** this work,chemometrics methods,such as classical least squares（CLS）,partial least squares（PLS）, principle component regression（PCR） and radial basis function-artificial neural networks（RBF-ANN）,were used to quantitatively resolve the overlapping *** was found that PCR gave the best results with total relative prediction error（RPE_T） of 7.71%.The proposed method was applied to determine these three drugs in several commercial food samples with spiked method and yielded satisfactory recoveries.

关键词： differential pulse stripping voltammetry Fluoroquinolone antibiotics Chemometrics Food samples

Electrochemical Determination of Trace Amounts of Lead (Ⅱ) and Cadmium (Ⅱ) at a Calix[6]arene Modified Carbon Paste Electrode

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Wuhan University Journal of Natural Sciences 2004年第6期9卷 943-948页

作者： JIXiao-bo WUYun-hua FEIJun-jie HUSheng-shui CollegeofChemistryandMolecularSciences WuhanUniversityWuhan430072HubeiChina

An electrochemical method for the simultaneous determination of lead(II) and Cadmium(II) with a calix[6]arene modified carbon paste electrode (CPE) has been developed. Pb2+ and Cd2+ were accumulated at the surface of the modified electrode via formation of chemical complexes with calix[6]arene, and reduced at 1.40 V. During the following anodic potential sweep, reduced lead and cadmium were oxidized, and two well-defined striping peaks appeared at about ?0.60 V and ?0.84 V. Compared with a bare carbon paste electrode, the calix[6]arene modified CPE greatly improves the sensitivity of determining lead and cadmium. The stripping peak currents change linearly with the concentration of Pb2+ 3.0×10?8–8.0×10?6 mol·L?1 and with that of Cd2+ 6.0×10?8–1.0×10?5 mol ·L?1. The detection limits of Pb2+ and Cd2+ are found to be 8.0×10?9 mol·L?1 and 2.0×10?8 mol·L?1, respectively. The modified carbon paste electrode was applied to determine trace levels of lead and cadmium in water samples. Comparing with that of atomic absorption spectrometry, the results suggests that the calix[6]arene modified CPE has great potential for the practical sample analysis. Key words lead(II) - cadmium(II) - calix[6]arene - differential pulse stripping voltammetry - chemically modified electrode CLC number O 657.15 Foundation item: Supported by the National Natural Science Foundation of China (60171023)Biography: JI Xiao-bo (1980-), male, Master, research direction: electroanalytical chemistry.

关键词： lead(II) cadmium(II) calixarene differential pulse stripping voltammetry chemically modified electrode

The Electrochemical Behavior and the Determination of Bavistin on Glassy Carbon Electrode

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Chinese Chemical Letters 1998年第8期9卷 747-748页

作者： Yuan Zhe PIAO Gui Fen WANG(Department of Chemistry, Yanbian University, Yani 133002) Department of Chemistry Yanbian University Yanji 133002 China

In this paper, the electrochendcal behavior of bavistin (MBC) on glassy carbon electrode is reported. In a base solution of pH=9.0 NH3-NH4Cl, a sensitive anodic peak was found by cyclic voltammetry. differential pulse stripping voltanunetry was applied for determing MBC in grains. The detection limit is 4×10-8mo/*** recovery is from 91.3% to 95.7%. The method has advantages of simplicity and high sensitivity.

关键词： bavistin glassy carbon electrode, cyclic voltammetry differential pulse stripping voltammetry pesticide