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- W2007204901 abstract "Dimethylglyoxime (DMG) has been tested as a complexing agent for the determination of nickel after online preconcentration on RP-C18 in a microcolumn using flow injection coupled with a flame atomic absorption spectrometry system (FI-FAAS). The Ni–DMG complexes formed online can be adsorbed on the C18 sorbent. Various parameters affecting the online Ni–DMG complex formation and its subsequent adsorption in the microcolumn as well as its elution into the nebulizer of the FAAS were optimized. A 10−3 mol/L solution of DMG in 4% ethanol was mixed online with an aqueous sample solution acidified to 0.1% (v/v) nitric acid and flowed for 30 s through the microcolumn. The adsorbed Ni–DMG complex in the microcolumn was eluted with ethanol containing 1% HNO3 into the nebulizer of the FAAS in 10 s. A good precision (RSD = 1.7%, n = 14), high enrichment factor (21), and high sample throughput (90 h−1) with detection limit (3ς) 3 μg/L were obtained. The method was applied to standard reference materials, i.e., NBS-362, NBS-364 (special low-alloy steel), and mussel (GBW 08571), for the determination of nickel and the results were in good agreement with certified values. Nickel recovery from seawater and high-purity magnesium oxide in the range 98–100% can be obtained by this method." @default.
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- W2007204901 date "1999-11-01" @default.
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- W2007204901 title "Determination of Nickel after Online Sorbent Preconcentration by FI-FAAS Using Dimethylglyoxime as a Complexing Agent" @default.
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- W2007204901 doi "https://doi.org/10.1006/mchj.1999.1799" @default.
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