Ion-pair hollow-fiber liquid-phase microextraction of the quaternary ammonium surfactant dicocodimethylammonium chloride
(2009) In Analytical and Bioanalytical Chemistry 393(3). p.929-937- Abstract
- A two-phase hollow-fiber (HF) liquid-phase microextraction (LPME) method was developed for determination of a quaternary ammonium compound surfactant, dicocodimethylammonium chloride, in aqueous samples. The porous HF was fixed on a metal rod support and was impregnated with approximately 6.6 mu L of organic extractant, which was immobilized in the HF pores. Surfactant extraction was facilitated by addition of carboxylic acid to the sample forming neutral ion pairs with the quaternary ammonium compound. After extraction, the analyte was transferred from the organic extractant in the fiber pores by dissolving the 1-octanol into 100 mu L methanol. The methanol extract was analyzed by liquid chromatography-mass spectrometry. The method was... (More)
- A two-phase hollow-fiber (HF) liquid-phase microextraction (LPME) method was developed for determination of a quaternary ammonium compound surfactant, dicocodimethylammonium chloride, in aqueous samples. The porous HF was fixed on a metal rod support and was impregnated with approximately 6.6 mu L of organic extractant, which was immobilized in the HF pores. Surfactant extraction was facilitated by addition of carboxylic acid to the sample forming neutral ion pairs with the quaternary ammonium compound. After extraction, the analyte was transferred from the organic extractant in the fiber pores by dissolving the 1-octanol into 100 mu L methanol. The methanol extract was analyzed by liquid chromatography-mass spectrometry. The method was optimized (with optimized parameters in brackets) with regard to type of organic extractant (1-octanol), fiber length (2 cm), choice and concentration of anionic carrier (600 mu g L-1 octanoate), procedure of transfer to methanol (15-min sonication), sample volume (250 mL), extraction time (17 h), pH (10), and ionic strength (50 mM carbonate). Aspects influencing repeatability in LPME of (quaternary ammonium) surfactants are discussed. The enrichment factor achieved in 250-mL carbonate buffer was around 400. Due to matrix effects, the enrichment factors achieved when industrial process water was analyzed were 120 or about 30% of that in carbonate buffer. Detection limits of 0.3 mu g L-1 in carbonate buffer and 0.9 mu g L-1 in industrial process water were obtained. If the studied compound is seen as a model substance representing quaternary dialkylated dimethylated ammonium surfactants in general, the developed method may be applied to other quaternary ammonium surfactants. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1311606
- author
- Hultgren, Sofie ; Larsson, Niklas LU ; Nilsson, Bo F. and Jönsson, Jan Åke LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- spectrometry, Mass, Liquid chromatography, Ion-pair extraction, surfactant, Cationic, Liquid-phase microextraction, Quaternary ammonium compound
- in
- Analytical and Bioanalytical Chemistry
- volume
- 393
- issue
- 3
- pages
- 929 - 937
- publisher
- Springer
- external identifiers
-
- wos:000262825300013
- scopus:59249086202
- ISSN
- 1618-2642
- DOI
- 10.1007/s00216-008-2524-8
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- 7a38ddb8-217d-4673-86ac-4e18154b2d28 (old id 1311606)
- date added to LUP
- 2016-04-01 12:05:19
- date last changed
- 2022-03-20 23:17:28
@article{7a38ddb8-217d-4673-86ac-4e18154b2d28,
abstract = {{A two-phase hollow-fiber (HF) liquid-phase microextraction (LPME) method was developed for determination of a quaternary ammonium compound surfactant, dicocodimethylammonium chloride, in aqueous samples. The porous HF was fixed on a metal rod support and was impregnated with approximately 6.6 mu L of organic extractant, which was immobilized in the HF pores. Surfactant extraction was facilitated by addition of carboxylic acid to the sample forming neutral ion pairs with the quaternary ammonium compound. After extraction, the analyte was transferred from the organic extractant in the fiber pores by dissolving the 1-octanol into 100 mu L methanol. The methanol extract was analyzed by liquid chromatography-mass spectrometry. The method was optimized (with optimized parameters in brackets) with regard to type of organic extractant (1-octanol), fiber length (2 cm), choice and concentration of anionic carrier (600 mu g L-1 octanoate), procedure of transfer to methanol (15-min sonication), sample volume (250 mL), extraction time (17 h), pH (10), and ionic strength (50 mM carbonate). Aspects influencing repeatability in LPME of (quaternary ammonium) surfactants are discussed. The enrichment factor achieved in 250-mL carbonate buffer was around 400. Due to matrix effects, the enrichment factors achieved when industrial process water was analyzed were 120 or about 30% of that in carbonate buffer. Detection limits of 0.3 mu g L-1 in carbonate buffer and 0.9 mu g L-1 in industrial process water were obtained. If the studied compound is seen as a model substance representing quaternary dialkylated dimethylated ammonium surfactants in general, the developed method may be applied to other quaternary ammonium surfactants.}},
author = {{Hultgren, Sofie and Larsson, Niklas and Nilsson, Bo F. and Jönsson, Jan Åke}},
issn = {{1618-2642}},
keywords = {{spectrometry; Mass; Liquid chromatography; Ion-pair extraction; surfactant; Cationic; Liquid-phase microextraction; Quaternary ammonium compound}},
language = {{eng}},
number = {{3}},
pages = {{929--937}},
publisher = {{Springer}},
series = {{Analytical and Bioanalytical Chemistry}},
title = {{Ion-pair hollow-fiber liquid-phase microextraction of the quaternary ammonium surfactant dicocodimethylammonium chloride}},
url = {{http://dx.doi.org/10.1007/s00216-008-2524-8}},
doi = {{10.1007/s00216-008-2524-8}},
volume = {{393}},
year = {{2009}},
}