title: [Flow-injection chemiluminescence determination of trace copper on-line separation and enrichment by ion imprinted polymer].
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.
authors.affiliation: School of Chemistry and Chemical Engineering, University of Jinan, Ji'nan 250022, China. jndxlhz@gmail.com
authors.forename: Hui-Zhi
authors.initials: HZ
authors.lastname: Li
authors.forename: Mei-Shan
authors.initials: MS
authors.lastname: Pei
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.forename: Qin
authors.initials: Q
authors.lastname: Wei