title: [Determination of trace cadmium in environment water samples by flame atomic absorption spectrometry using flow injection on-line preconcentration with double microcolumns].
abstract: A rapid and sensitive methed for the determination of trace cadmium in environment water samples based on flowinjection on-line preconcentration on two-microcolumn system-flame atomic absorption spectrometry has been developed. The cadmium in samples was sequentially retained on two microcolumns with cation exchange resin and was eluted directly in the nebulizer by 1.5 mol x L(-1) HCl solution. The characteristic concentration (preconcentration time 1 min) for cadmium was 0.931 microg x L(-1). The relative standard deviation at the 5 microg x L(-1) level was 2.69% and the corresponding detection limit (3sigma) was 0.808 microg x L(-1). The method has been successfully applied to the determination of cadmium in water reference material GBW08608 and other water samples.
authors.affiliation: School of Public Health, Hebei Medical University, Shijiazhuang 050017, China.
authors.forename: Wei-Jun
authors.initials: WJ
authors.lastname: Kang
authors.forename: Shu-Xuan
authors.initials: SX
authors.lastname: Liang
authors.forename: Li-Hui
authors.initials: LH
authors.lastname: Jia
authors.forename: Li-Qin
authors.initials: LQ
authors.lastname: Xu
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Han-Wen
authors.initials: HW
authors.lastname: Sun
mesh_terms: D002104:Cadmium / Q000032:analysis*; D017022:Flow Injection Analysis; D006863:Hydrogen-Ion Concentration; D015203:Reproducibility of Results; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium