Simple hollow fiber liquid membrane based pre-concentration of silver for atomic absorption spectrometry
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4418986
- author
- Antonio Lopez-Lopez, Jose ; Jönsson, Jan Åke LU ; Garcia-Vargas, Manuel and Moreno, Carlos
- organization
- publishing date
- 2014
- 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
- 2016-04-01 10:12:18
- date last changed
- 2022-04-19 23:46:38
@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}},
doi = {{10.1039/c3ay42024h}},
volume = {{6}},
year = {{2014}},
}