[Determination of trace cadmium in environment water samples by flame atomic absorption spectrometry using flow injection on-line preconcentration with double microcolumns].
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.
Kang
Wei-Jun
WJ
School of Public Health, Hebei Medical University, Shijiazhuang 050017, China.
Liang
Shu-Xuan
SX
Jia
Li-Hui
LH
Xu
Li-Qin
LQ
Zhao
Yan
Y
Sun
Han-Wen
HW
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*
D014874:Water Pollutants, Chemical; D002104:Cadmium