Abstract
The suitability of 1-nitroso-2-naphthol as a complexing agent for on-line preconcentration of copper using RP-C18 material in a microcolumn with flow injection coupled with flame atomic absorption spectrometry (FI-FAAS) has been tested. Various parameters affecting complex formation, such as pH, sample flow rate, etc. and its elution into the nebulizer of FAAS were optimized. ¶A 5 × 10–3 mol/L reagent was on-line mixed with aqueous sample solution acidified with 0.1% (v/v) nitric acid ¶(pH 3–4) and flowed through the microcolumn for 30 s. The adsorbed complexes in the microcolumn were eluted with ethanol in 10 s into the nebulizer of FAAS. A good precision (1.7% for 50 μg/L copper, n = 12), high enrichment factor (19) with detection limit (3σ) 2.0 μg/L, and sample throughput (90 h–1) were obtained. The method was applied to certified reference materials seawater, mussel (biological), NBS-362 and NBS-364 (special low alloy steel), for the determination of copper, and the results were in good agreement with the certified values.
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Received: 4 May 1999 / Revised: 25 June 1999 / Accepted: 29 June 1999
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Ali, A., Ye, Y., Xu, G. et al. Copper determination after FI on-line sorbent preconcentration using 1-nitroso-2-naphthol as a complexing reagent. Fresenius J Anal Chem 365, 642–646 (1999). https://doi.org/10.1007/s002160051538
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DOI: https://doi.org/10.1007/s002160051538