title: Determination of chromium (III) in natural water samples utilizing capillary micro-extraction on nanometre zirconium phosphate coating coupled to electrothermal atomic absorbance spectrometry.
abstract: A simple and sensitive method for the separation of Cr(III) in natural water was developed. The novel method was targeted on extraction of Cr(III) by using a nanometre-scale zirconium phosphate coated capillary tube, and determined by electrothermal atomic absorption spectrometry (ETAAS). The variables influencing the micro-extraction of Cr(III) including pH, sample volume, sample flow rate, eluent volume and eluent flow rate were investigated. Under the optimized conditions, the detection limit (3s) was 0.042 ng mL(-1), and the relative standard deviation (RSD) was 1.5% (c=10 ng mL(-1), n=7). The proposed method was applied to determination of Cr(III) in natural waters.
authors.affiliation: Department of Chemistry, Shanxi Normal University, Linfen, 041004, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Bai
authors.forename: Zhefeng
authors.initials: Z
authors.lastname: Fan
mesh_terms: D002138:Calibration; D002857:Chromium / Q000032:analysis*; D005618:Fresh Water / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D012680:Sensitivity and Specificity; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods*; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis; D015040:Zirconium / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002857:Chromium; C027006:zirconium phosphate; D015040:Zirconium