A novel equilibrium extraction technique employing hollow fibre liquid phase microextraction for trace enrichment of freely dissolved organophosphorus pesticides in environmental waters
(2008) In International Journal of Environmental Analytical Chemistry 88(13). p.933-945- Abstract
- A new design of equilibrium hollow fibre liquid phase microextraction (HF-LPME) was developed for the determination of three freely dissolved organophosphorus pesticides (OPPs), i.e. diazinon (O,O-diethyl-O-2-isopropyl-4-methyl-6-pyrimidyl thiophosphate), chlorpyrifos (O,O-diethyl-O-[3,5,6-trichloro-2-pyridyl] phosphorothioate), and fenthion (O,O-dimethyl-O-4-methylthio-m-tolyl phosphorothioate) as model compounds. In this new design a 1.2-1.4 cm length of a hollow fibre (HF), inserted to the end of 20 cm copper wire and impregnated with organic solvent, was used to extract the freely dissolved concentration of OPPs in various water samples. The limits of detection (LOD) in reagent water using gas chromatography-mass spectrometry in the... (More)
- A new design of equilibrium hollow fibre liquid phase microextraction (HF-LPME) was developed for the determination of three freely dissolved organophosphorus pesticides (OPPs), i.e. diazinon (O,O-diethyl-O-2-isopropyl-4-methyl-6-pyrimidyl thiophosphate), chlorpyrifos (O,O-diethyl-O-[3,5,6-trichloro-2-pyridyl] phosphorothioate), and fenthion (O,O-dimethyl-O-4-methylthio-m-tolyl phosphorothioate) as model compounds. In this new design a 1.2-1.4 cm length of a hollow fibre (HF), inserted to the end of 20 cm copper wire and impregnated with organic solvent, was used to extract the freely dissolved concentration of OPPs in various water samples. The limits of detection (LOD) in reagent water using gas chromatography-mass spectrometry in the selected ion monitoring (SIM) mode was in the range of 15-80 ng L-1. The relative standard deviations of the analysis (inter- and intra-day) were 8.7-30%. The method was applied to the extraction of spiked lake and ground water samples. The ground water sample was spiked at 0.1 and 0.2 g L-1 concentrations of the analytes under study and the average extraction efficiency at the two concentrations was below 1% showing the non-depletive nature of the extraction, meaning that the freely dissolved concentrations are measured as opposed to total concentrations. Good linearity was obtained for all of the analytes in both reagent water and lake water samples with correlation coefficients, R-2, ranging from 0.991 to 0.996, in the concentration ranges of 25-400 ng L-1. The method was found to be very simple and inexpensive, with the possibility of running hundreds of samples in parallel with very minimal expenses for the determination of freely dissolved OPPs. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1286063
- author
- Berhanu, Tarekegn ; Megersa, Negussie ; Solomon, Theodros and Jönsson, Jan Åke LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- organophosphorus pesticides, microextraction, freely dissolved concentration, hollow fibre liquid phase, GC-MS, non-depletive, extraction
- in
- International Journal of Environmental Analytical Chemistry
- volume
- 88
- issue
- 13
- pages
- 933 - 945
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000259649200003
- scopus:53149152606
- ISSN
- 1029-0397
- DOI
- 10.1080/03067310802357803
- 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
- 2607f532-2257-4126-b464-73261636f37e (old id 1286063)
- date added to LUP
- 2016-04-01 12:03:51
- date last changed
- 2022-01-26 22:18:26
@article{2607f532-2257-4126-b464-73261636f37e,
abstract = {{A new design of equilibrium hollow fibre liquid phase microextraction (HF-LPME) was developed for the determination of three freely dissolved organophosphorus pesticides (OPPs), i.e. diazinon (O,O-diethyl-O-2-isopropyl-4-methyl-6-pyrimidyl thiophosphate), chlorpyrifos (O,O-diethyl-O-[3,5,6-trichloro-2-pyridyl] phosphorothioate), and fenthion (O,O-dimethyl-O-4-methylthio-m-tolyl phosphorothioate) as model compounds. In this new design a 1.2-1.4 cm length of a hollow fibre (HF), inserted to the end of 20 cm copper wire and impregnated with organic solvent, was used to extract the freely dissolved concentration of OPPs in various water samples. The limits of detection (LOD) in reagent water using gas chromatography-mass spectrometry in the selected ion monitoring (SIM) mode was in the range of 15-80 ng L-1. The relative standard deviations of the analysis (inter- and intra-day) were 8.7-30%. The method was applied to the extraction of spiked lake and ground water samples. The ground water sample was spiked at 0.1 and 0.2 g L-1 concentrations of the analytes under study and the average extraction efficiency at the two concentrations was below 1% showing the non-depletive nature of the extraction, meaning that the freely dissolved concentrations are measured as opposed to total concentrations. Good linearity was obtained for all of the analytes in both reagent water and lake water samples with correlation coefficients, R-2, ranging from 0.991 to 0.996, in the concentration ranges of 25-400 ng L-1. The method was found to be very simple and inexpensive, with the possibility of running hundreds of samples in parallel with very minimal expenses for the determination of freely dissolved OPPs.}},
author = {{Berhanu, Tarekegn and Megersa, Negussie and Solomon, Theodros and Jönsson, Jan Åke}},
issn = {{1029-0397}},
keywords = {{organophosphorus pesticides; microextraction; freely dissolved concentration; hollow fibre liquid phase; GC-MS; non-depletive; extraction}},
language = {{eng}},
number = {{13}},
pages = {{933--945}},
publisher = {{Taylor & Francis}},
series = {{International Journal of Environmental Analytical Chemistry}},
title = {{A novel equilibrium extraction technique employing hollow fibre liquid phase microextraction for trace enrichment of freely dissolved organophosphorus pesticides in environmental waters}},
url = {{http://dx.doi.org/10.1080/03067310802357803}},
doi = {{10.1080/03067310802357803}},
volume = {{88}},
year = {{2008}},
}