Jin Zhang

University of Jinan (Jinan, China), Chi-nan-shih, Shandong Sheng, China

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Publications (2)0.58 Total impact

  • Hui-Zhi Li · Mei-Shan Pei · Jin Zhang · Qin Wei
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    ABSTRACT: In the present study, Cu(II)-imprinted polymer was prepared and used as an effective method for separation and enrichment of Cu (II) ion in samples. An on-line preconcentration and extraction flow-injection system using solid phase extraction (SPE) column packed with prepared ion imprinted polymer (IIP) was set up. The column was eluted with a mixture of ethanol and H2 SO4 after preconcentration. A sensitive and simple chemiluminescence (CL) method using flow-injection has been developed for the determination of copper. The method is based on the fact that traces of Cu(II) exert a catalytic action on the oxidation between morin by KMnO4 solution. After optimizing the different experimental parameters, a calibration graph was obtained over the concentration range of 0 to 10 microg x mL(-1) for Cu(II) and r = 0.996 8. The detection limit is 0.001 2 microg x mL(-1). The recoveries are between 95% and 105% and the standard relative deviations (RSD) are less than 3% at 4.0 microg x mL(-1) (n = 9) level was obtained. The new chemiluminescence determination for copper has been established. The method can be satisfactorily applied to the determination of copper in sample.
    No preview · Article · Jun 2011 · Guang pu xue yu guang pu fen xi = Guang pu
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    ABSTRACT: This paper describes the determination of trace La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Yb and Lu in the sample, using carbon powder, potassium sulfate, barium sulfate, strontium sulfate, and scandium chloride as buffer, by atomic emission spectrometry (AES). Scandium was selected as internal standard line. Sample separation and chemical treatment were not required. The sample was directly loaded into ordinary electrode. The method is simple, rapid and accurate. The determination requirement and influence factors were studied. A new method was developed for the determination of ten rare earth elements, for which the detection limit is smaller than 0.030%, and the range of the recovery is 94%-105%. The results of these elements in standard sample are in agreement with certified values, and the RSD is smaller than 5% (n = 9). The method has been applied to the determination of ten rare earth elements with satisfactory results.
    No preview · Article · Oct 2005 · Guang pu xue yu guang pu fen xi = Guang pu