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• W1979891331 abstract "1,10-Phenanthroline (phen) has been tested as a complexing agent for on-line preconcentration of copper, cadmium and cobalt, on RP-C18 material in a microcolumn with a flow injection–flame atomic absorption spectrometric system. The on-line formed metal-phen complexes can be adsorbed on the C18 sorbent material. Various parameters affecting complex formation and the subsequent complex adsorption in the microcolumn as well as its elution into the nebulizer of the spectrometer were optimized. A 2.5×10−3 mol l−1 phen solution in 2% ethanol was mixed on-line with aqueous sample solution acidified with 0.1% (v/v) nitric acid to pH 5–6 and flowed through the microcolumn for 30 s. The adsorbed metal-phen complexes were eluted with ethanol in 10 s into the nebulizer. A good relative standard deviation (3.0%, 1.4%, 2.2% at 50, 50 and 100 μg l−1, n=14), high enrichment factors, 32, 32 and 22, with 3σ detection limits of 0.3, 0.5 and 6.0 μg l−1 for Cu(II), Cd(II) and Co(II), respectively, and a sample throughput of 90/h were obtained. The method was applied to standard reference materials, i.e. seawater, mussel (biological) and GSS-1 (geological), for the determination of copper and cadmium; the results were in good agreement with the certified values." @default.
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• W1979891331 date "1999-06-01" @default.
• W1979891331 modified "2023-10-16" @default.
• W1979891331 title "1,10-Phenanthroline as a complexing agent for on-line sorbent extraction/preconcentration for flow injection–flame atomic absorption spectrometry" @default.
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• W1979891331 doi "https://doi.org/10.1016/s0003-2670(99)00223-8" @default.
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