Determination of very low amounts of free copper and nickel ions in beverages and water samples using cloud point extraction assisted by silver nanoparticles

Abstract

Silver nanoparticles (AgNPs), functionalized with the sodium salt of 2-mercaptoethanesulfonic acid (MESNA), can be used in a cloud point extraction process with Triton X-114 to transfer low amounts of copper and nickel ions to the surfactantrich phase. Both metals are then measured in the coacervate by electrothermal atomic absorption spectrometry. For a 20 mL aqueous phase containing a low concentration (100 μg L -1 ) of the functionalized AgNPs and 0.15% Triton X-114, an enrichment factor of 510 is achieved. The detection limits are 2.4 and 2.1 ng L -1 for copper and nickel, respectively. The reliability of the procedure is verified by analyzing three water samples with certified copper and nickel contents. The procedure is also applied to the determination of these analytes in wine and beer samples. The results indicate that only free or labile ionic copper and nickel species are transferred to the coacervate, thus providing a way for the rapid fractionation of these compounds without the need for a previous solid phase extraction stage.

The Fundamentals and Recent Applications of Micellar System Extraction for Nanoparticles and Bioactive Molecules: A Review

“…This procedure allows us to transfer tiny amounts of metal ions into the ML. The D. L. is 2.4 and 2.1 ng/L for Cu(II) and Ni(II), respectively [75]. On the other hand, for extraction, Cr(III) and Cr(VI) used unmodified AgNPs as a support carrier with the present Triton X-114 [76].…”

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…The recoveries ranged from 73.8% to 105.4% with RSDs <10.4%. Lopez-Garcia et al 38 showed that Ag NPs, functionalised with 2-mercaptoethanesulfonic acid, could be used to assist the transfer of Cu and Ni at low concentrations from the aqueous to the surfactant-rich phase (coacervate) during CPE. The authors optimised the procedure and ascertained that the pH range 3.0-3.5 was required with heating to 40 C for 10 min.…”

Solvent Extraction Method for Separation and Determination of Zn (||) by Using of Imidazole Derivative

“…There was many application for solvent extraction to separation and determination metal elements as cations or as anions and applicable their methods for determination these elements in different samples after determination optimum condition [4][5][6][7][8][9][10] .And in preferential research involved separation and extraction Lanthanum(III) by joined cloud point with salvation [11] .By application Onium method for separation and spectrophotometric determination of Co(II) joined with cloud point extraction methodology [12] . Extracted many metal ions by solvent extraction methods [13][14][15][16][17][18][19] .…”