NDLI: Methyl benzoate as a non-halogenated extraction solvent for dispersive liquid–liquid microextraction: Application to the preconcentration of copper(ii) with 1-nitroso-2-naphthol

Content Provider	Royal Society of Chemistry (RSC)
Author	Kagaya, Shigehiro Yoshimori, Torajiro
Copyright Year	2012
Abstract	Methyl benzoate, whose density is greater than that of water, was used as a non-halogenated extraction solvent for dispersive liquid–liquid microextraction (DLLME). The quantitative extraction of some elements, such as Au(III), Cd(II), Co(II), Fe(III), Ni(II), Pb(II), and Pd(II), was achieved using some traditional extractants, including diethyldithiocarbamate, 1-(2-pyridilazo)-2-naphthol, 8-hydroxyquinoline, and 1-nitroso-2-naphthol (NN) with acetone as a disperser solvent. As a demonstration, the preconcentration of Cu(II) with NN was studied in detail. The Cu(II) in 8 mL of a sample solution was rapidly and quantitatively extracted at pH 7 using 80 μL of methyl benzoate containing 1 mmol L−1 of NN; in this system, no disperser solvent was needed. After centrifugation, the extracted Cu(II) in a sedimented phase could be determined by electrothermal atomic absorption spectrometry. The detection limit was 2.3 ng L−1 (three times the standard deviation of the blank values, n = 8) as the Cu(II) concentration in 8 mL of the sample solution. The proposed method was applicable to the determination of Cu(II) in some water samples, including tap water, ground water, and snow-melted water without any interference.
Starting Page	4378
Ending Page	4383
Page Count	6
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	4
Issue Number	12
Journal	Analytical Methods
DOI	10.1039/c2ay25823d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	8-Hydroxyquinoline Absorption spectroscopy Centrifugation Methyl benzoate Lead PH Nitroso Naphthol Standard deviation Solvent Acetone
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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