Coupling dispersive liquid-liquid microextraction to inductively coupled plasma atomic emission spectrometry: An oxymoron?
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Title: | Coupling dispersive liquid-liquid microextraction to inductively coupled plasma atomic emission spectrometry: An oxymoron? |
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Authors: | Martínez Rubio, David | Torregrosa Carretero, Daniel | Grindlay, Guillermo | Gras, Luis | Mora, Juan |
Research Group/s: | Espectrometría Atómica Analítica (GEAA) |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología |
Keywords: | Metals | Sample preparation | Dispersive liquid-liquid microextraction | Flow-injection | Atomic emission spectrometry | Inductively coupled plasma |
Knowledge Area: | Química Analítica |
Issue Date: | 1-Jan-2018 |
Publisher: | Elsevier |
Citation: | Talanta. 2018, 176: 374-381. doi:10.1016/j.talanta.2017.08.036 |
Abstract: | Coupling dispersive liquid-liquid micro-extraction (DLLME) to inductively coupled plasma atomic emission spectrometry (ICP-AES) is usually troublesome due to the limited plasma tolerance to the organic solvents usually employed for metal extraction. This work explores different coupling strategies allowing the multi-element determination by ICP-AES of the solutions obtained after DLLME procedures. To this end, three of the most common extractant solvents in DLLME procedures (1-undecanol, 1-butyl-3-methyl-imidazolium hexafluorophosphate and chloroform) have been selected to face most of the main problems reported in DLLME-ICP-AES coupling (i.e., those arising from the high solvent viscosity and volatility). Results demonstrate that DLLME can be successfully coupled to ICP-AES after a careful optimization of the experimental conditions. Thus, elemental analysis in 1-undecanol and 1-butyl-3-methyl-imidazolium hexafluorophosphate extracts can be achieved by ICP-AES after a simple dilution step with methanol (1:0.5). Chloroform can be directly introduced into the plasma with minimum changes in the ICP-AES configuration usually employed when operating with aqueous solutions. Diluted inorganic acid solutions (1% w w−1 either nitric or hydrochloric acids) have been successfully tested for the first time as a carrier for the introduction of organic extractants in ICP-AES. The coupling strategies proposed have been successfully applied to the multi-element analysis (Al, Cu, Fe, Mn, Ni and Zn) of different water samples (i.e. marine, tap and river) by DLLME-ICP-AES. |
Sponsor: | The authors would like to thank the Generalitat Valenciana (Project GV/2014/138) for the financial support of this work. D. Martínez and D. Torregrosa also thank the University of Alicante for the research fellowships (UAFPU2015-5998 and AII16-33). |
URI: | http://hdl.handle.net/10045/68969 |
ISSN: | 0039-9140 (Print) | 1873-3573 (Online) |
DOI: | 10.1016/j.talanta.2017.08.036 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2017 Elsevier B.V. |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.talanta.2017.08.036 |
Appears in Collections: | INV - GEAA - Artículos de Revistas |
Files in This Item:
File | Description | Size | Format | |
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2018_Martinez_etal_Talanta_final.pdf | Versión final (acceso restringido) | 894,28 kB | Adobe PDF | Open Request a copy |
2018_Martinez_etal_Talanta_accepted.pdf | Accepted Manuscript (acceso abierto) | 777,86 kB | Adobe PDF | Open Preview |
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