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Simple hollow fiber liquid membrane based pre-concentration of silver for atomic absorption spectrometry

Antonio Lopez-Lopez, Jose; Jönsson, Jan Åke LU ; Garcia-Vargas, Manuel and Moreno, Carlos (2014) In Analytical Methods 6(5). p.1462-1467
Abstract
Silver pollution has gained attention in the last few years because silver is being massively used as a bactericide in self-care, medical and textile products. Difficulties of Ag determination are associated with the very low concentrations in which it is normally found (ng L-1) and the nature of the sample matrix. Standard methods such as liquid-liquid extraction (LLE) are regularly used. Alternatively, liquid phase micro-extraction (LPME) appears to be an environmentally friendly tool for sample treatment that offers higher pre-concentration factors. This allows the determination of ultra-trace levels of silver using standard instrumental techniques such as atomic absorption spectrometry. In this work, a hollow fiber LPME is proposed.... (More)
Silver pollution has gained attention in the last few years because silver is being massively used as a bactericide in self-care, medical and textile products. Difficulties of Ag determination are associated with the very low concentrations in which it is normally found (ng L-1) and the nature of the sample matrix. Standard methods such as liquid-liquid extraction (LLE) are regularly used. Alternatively, liquid phase micro-extraction (LPME) appears to be an environmentally friendly tool for sample treatment that offers higher pre-concentration factors. This allows the determination of ultra-trace levels of silver using standard instrumental techniques such as atomic absorption spectrometry. In this work, a hollow fiber LPME is proposed. Silver pre-concentration has been conducted using tri-isobutylphosphine sulphide (TIBPS) as a carrier from the sample to an acceptor solution through a solvent placed in the fiber pores. Accurel-PP 50/280 fibers with an internal volume of 20 mu L were used for 50 mL samples. After optimization, 0.1 M KNO3 in the sample, 0.1 M TIBPS in dihexyl ether as the organic phase and 1 M Na2S2O3 in the acceptor solution were established. The system offers enrichment factors of 1053 times, a limit of detection of 1.16 ng L-1. This method improves the limit of detection of the most recent liquid micro-extraction methods for silver pre-concentration coupled with GFAAS, being in this case comparable to ICP-MS detection based techniques. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Analytical Methods
volume
6
issue
5
pages
1462 - 1467
publisher
Royal Society of Chemistry
external identifiers
  • wos:000332129500028
  • scopus:84894150593
ISSN
1759-9660
DOI
10.1039/c3ay42024h
language
English
LU publication?
yes
id
4737fcec-a18d-47c3-9664-80afc675ca66 (old id 4418986)
date added to LUP
2014-04-29 12:50:53
date last changed
2017-11-05 03:07:52
@article{4737fcec-a18d-47c3-9664-80afc675ca66,
  abstract     = {Silver pollution has gained attention in the last few years because silver is being massively used as a bactericide in self-care, medical and textile products. Difficulties of Ag determination are associated with the very low concentrations in which it is normally found (ng L-1) and the nature of the sample matrix. Standard methods such as liquid-liquid extraction (LLE) are regularly used. Alternatively, liquid phase micro-extraction (LPME) appears to be an environmentally friendly tool for sample treatment that offers higher pre-concentration factors. This allows the determination of ultra-trace levels of silver using standard instrumental techniques such as atomic absorption spectrometry. In this work, a hollow fiber LPME is proposed. Silver pre-concentration has been conducted using tri-isobutylphosphine sulphide (TIBPS) as a carrier from the sample to an acceptor solution through a solvent placed in the fiber pores. Accurel-PP 50/280 fibers with an internal volume of 20 mu L were used for 50 mL samples. After optimization, 0.1 M KNO3 in the sample, 0.1 M TIBPS in dihexyl ether as the organic phase and 1 M Na2S2O3 in the acceptor solution were established. The system offers enrichment factors of 1053 times, a limit of detection of 1.16 ng L-1. This method improves the limit of detection of the most recent liquid micro-extraction methods for silver pre-concentration coupled with GFAAS, being in this case comparable to ICP-MS detection based techniques.},
  author       = {Antonio Lopez-Lopez, Jose and Jönsson, Jan Åke and Garcia-Vargas, Manuel and Moreno, Carlos},
  issn         = {1759-9660},
  language     = {eng},
  number       = {5},
  pages        = {1462--1467},
  publisher    = {Royal Society of Chemistry},
  series       = {Analytical Methods},
  title        = {Simple hollow fiber liquid membrane based pre-concentration of silver for atomic absorption spectrometry},
  url          = {http://dx.doi.org/10.1039/c3ay42024h},
  volume       = {6},
  year         = {2014},
}