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preconcentration 2

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adsorption onto niobium wire 1

aniline determination 1

copper 1

electrothermal atomization atomic absorption spectrometry 1

flame atomic absorption spectrometry 1

oxidized multiwalled carbon nanotubes 1

solid-phase extraction 1

solidified floating organic drop microextraction 1

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Preconcentration of trace elements by adsorption onto a niobium wire for electrothermal atomization atomic

Satoshi KANECO, Hiroaki KITANAGA, Hideyuki KATSUMATA, Tohru SUZUKI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4, Pages 432-435 doi: 10.1007/s11705-012-1219-z

Abstract: In the present work, a new preconcentration method of trace elements by adsorption onto a niobium wire

Keywords： preconcentration adsorption onto niobium wire electrothermal atomization atomic absorption spectrometry

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Determination of aniline derivatives in water samples after preconcentration with oxidized multiwalled

Hideyuki KATSUMATA, Yuta ODA, Satoshi KANECO, Tohru SUZUKI, Kiyohisa OHTA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3, Pages 270-275 doi: 10.1007/s11705-012-1298-x

Abstract: A sensitive and selective preconcentration method using solid-phase extraction (SPE) disk made from oxidized

Keywords： aniline determination solid-phase extraction oxidized multiwalled carbon nanotubes water sample HPLC-UV

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Ultrasound-assisted emulsification solidified floating organic drop microextraction for the determination of trace amounts of copper in water samples

Qingyun CHANG, Jingwen ZHANG, Xin DU, Jingjun MA, Jingci LI,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2, Pages 187-195 doi: 10.1007/s11783-010-0030-7

Abstract: A simple and efficient liquid-phase microextraction (LPME) technique was developed using ultrasound-assisted emulsification solidified floating organic drop microextraction (USAE-SFODME) combined with flame atomic absorption spectrometry, for the extraction and determination of trace copper in water samples. 1-(2-Pyridylazo)-2-naphthol (PAN) was used as chelating agent. Microextraction efficiency factors (including extraction solvent type, extraction volume, time, temperature, and pH), the amount of the chelating agent, and salt effect were investigated and optimized. Under the optimum extraction conditions, figures of merit of the proposed method were evaluated. The calibration graph was linear in the range of 20–600 g·L with a detection limit of 0.76 g·L. The relative standard deviation (R.S.D) for ten replicate measurements of 20 and 400 g·L of copper was 3.83% and 2.65%, respectively. Finally, the proposed method was applied to tap water, river water, and sea water, and accuracy was assessed through the analysis of certified reference water or recovery experiments.

Keywords： emulsification solidified floating organic drop microextraction flame atomic absorption spectrometry preconcentration