Copper determination after FI on-line sorbent preconcentration using 1-nitroso-2-naphthol as a complexing reagent |
| |
Authors: | A Ali Y Ye G Xu and X Yin |
| |
Institution: | (1) Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China, CN |
| |
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.
Received: 4 May 1999 / Revised: 25 June 1999 / Accepted: 29 June 1999 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|