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  • Title: Determination of chromium (III) in natural water samples utilizing capillary micro-extraction on nanometre zirconium phosphate coating coupled to electrothermal atomic absorbance spectrometry.
    Author: Bai X, Fan Z.
    Journal: J Environ Monit; 2009 Feb; 11(2):326-9. PubMed ID: 19212589.
    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.
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