caa a22 4500 463218795 CHVBK 20180405153205.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1134/S1061934807060159 doi (NATIONALLICENCE)springer-10.1134/S1061934807060159 Determination of fluoride by an ion chromatography system using the preconcentration on nanometer-size zirconia [Elektronische Daten] [Y. Hang, J. Liu] 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. Pleiades Publishing, Ltd., 2007 adsorption nationallicence fluoride ions nationallicence nanometer-size zirconia nationallicence microcolumn nationallicence ion chromatography system nationallicence Hang Y. College of Chemistry, South China University of Technology, 510640, Guangzhou City, Guangdong Province, China aut Liu J. College of Chemistry, South China University of Technology, 510640, Guangzhou City, Guangdong Province, China aut Journal of Analytical Chemistry Nauka/Interperiodica 62/6(2007-06-01), 583-587 1061-9348 62:6<583 2007 62 10809 https://doi.org/10.1134/S1061934807060159 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807060159 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hang Y. College of Chemistry, South China University of Technology, 510640, Guangzhou City, Guangdong Province, China aut NATIONALLICENCE 700 1- Liu J. College of Chemistry, South China University of Technology, 510640, Guangzhou City, Guangdong Province, China aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/6(2007-06-01), 583-587 1061-9348 62:6<583 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer