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- W1966092610 abstract "Oxine/formaldehyde/resorcinol and oxine/formaldehyde/hydroquinone resins have been synthesized and their physicochemical properties studied. Conditions were optimized for the preconcentration of copper by batch extraction and column chromatography with the resins. A flow-injection analysis (FIA) manifold was constructed for the determination of copper at ng levels by preconcentration on microcolumns containing the resins, stripping, and atomic-absorption spectrometry. For batch preconcentration a pH of about 2.5–3 was optimal whereas in the FIA system a broader pH range (∼ 2–3.5) could be used. Separations of binary mixtures of Cu(II) with Ni(II) or PB(II) at U μg/ml level did not show any cross-contamination. In the FIA, a 2 cm long column and 2 ml/min flow-rate were adequate for quantitative uptake of copper; 50 μ1 of 0.1M hydrochloric acid quantitatively eluted the copper." @default.
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- W1966092610 date "1991-07-01" @default.
- W1966092610 modified "2023-10-12" @default.
- W1966092610 title "Determination of copper at ng levels by in-line preconcentration and flow-injection analysis coupled with flame atomic-absorption spectrometry" @default.
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- W1966092610 doi "https://doi.org/10.1016/0039-9140(91)80196-7" @default.
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