Determination of fluoride by an ion chromatography system using the preconcentration on nanometer-size zirconia |
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Authors: | Y -P Hang J -M Liu |
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Institution: | (1) College of Chemistry, South China University of Technology, Guangzhou City, Guangdong Province, 510640, China |
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Abstract: | A simple rapid microcolumn preconcentration technique is described for the determination of fluoride ions in geological samples
through the ion chromatography system. The technique is based on the adsorption of fluoride ions on H2SO4-activated nanometer-size zirconia (NSZ) packed in a microcolumn. Activation parameters (concentration and contact time) were
studied, and an activation time of about 50 min and a concentration of 6 M were then selected. The analytical procedure was
optimized in terms of the flow rate of the sample solution, eluent concentration, and the eluent flow rate for the adsorption
capacities of H2SO4-activated NSZ. At a flow rate of 1.0 mL/min, the detection limits (3σ) of the technique for fluoride ions was 0.3 ng/mL,
and the RSD was 0.04%. The dynamic adsorption capacity of NSZ was found to be 8.4 mg/g.
The text was submitted by the authors in English. |
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Keywords: | adsorption fluoride ions nanometer-size zirconia microcolumn ion chromatography system |
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