A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry
In this study, a rapid, specific and sensitive multi-residue method based on acetonitrile extraction followed by dispersive solid-phase extraction (d-SPE) clean-up was implemented and validated for multiclass pesticide residues determination in palm oil for the first time. Liquid-liquid extraction f...
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| Format: | Article |
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2012
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| _version_ | 1796945420515016704 |
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| author | Sobhanzadeh, E. Bakar, N.K.A. Abas, M.R. Nemati, K. |
| author_facet | Sobhanzadeh, E. Bakar, N.K.A. Abas, M.R. Nemati, K. |
| author_sort | Sobhanzadeh, E. |
| collection | UM |
| description | In this study, a rapid, specific and sensitive multi-residue method based on acetonitrile extraction followed by dispersive solid-phase extraction (d-SPE) clean-up was implemented and validated for multiclass pesticide residues determination in palm oil for the first time. Liquid-liquid extraction followed by low-temperature precipitation procedure was evaluated in order to study the freezing-out clean-up efficiency to obtain high recovery yield and low coextract fat residue in the final extract. For clean-up step, d-SPE was carried out using a combination of anhydrous magnesium sulphate (MgSO4), primary secondary amine, octadecyl (C18) and graphitized carbon black. Recovery study was performed at two concentration levels (10 and 100 ng g -1), yielding recovery rates between 74.52 and 97.1 with relative standard deviation values below 10 (n=6) except diuron. Detection and quantification limits were lower than 5 and 9 ng g -1, respectively. In addition, soft matrix effects (�±20) were observed for most of the studied pesticides except malathion that indicated medium (20-50) matrix effects. The proposed method was successfully applied to the analysis of suspected palm oil samples. |
| first_indexed | 2024-03-06T05:16:23Z |
| format | Article |
| id | um.eprints-6264 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:16:23Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | um.eprints-62642013-09-23T02:29:52Z http://eprints.um.edu.my/6264/ A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry Sobhanzadeh, E. Bakar, N.K.A. Abas, M.R. Nemati, K. QD Chemistry In this study, a rapid, specific and sensitive multi-residue method based on acetonitrile extraction followed by dispersive solid-phase extraction (d-SPE) clean-up was implemented and validated for multiclass pesticide residues determination in palm oil for the first time. Liquid-liquid extraction followed by low-temperature precipitation procedure was evaluated in order to study the freezing-out clean-up efficiency to obtain high recovery yield and low coextract fat residue in the final extract. For clean-up step, d-SPE was carried out using a combination of anhydrous magnesium sulphate (MgSO4), primary secondary amine, octadecyl (C18) and graphitized carbon black. Recovery study was performed at two concentration levels (10 and 100 ng g -1), yielding recovery rates between 74.52 and 97.1 with relative standard deviation values below 10 (n=6) except diuron. Detection and quantification limits were lower than 5 and 9 ng g -1, respectively. In addition, soft matrix effects (�±20) were observed for most of the studied pesticides except malathion that indicated medium (20-50) matrix effects. The proposed method was successfully applied to the analysis of suspected palm oil samples. 2012 Article PeerReviewed Sobhanzadeh, E. and Bakar, N.K.A. and Abas, M.R. and Nemati, K. (2012) A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry. Environmental Monitoring and Assessment, 184 (9). pp. 5821-5828. ISSN 01676369, DOI https://doi.org/10.1007/s10661-011-2384-0 <https://doi.org/10.1007/s10661-011-2384-0>. 10.1007/s10661-011-2384-0 |
| spellingShingle | QD Chemistry Sobhanzadeh, E. Bakar, N.K.A. Abas, M.R. Nemati, K. A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title | A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title_full | A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title_fullStr | A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title_full_unstemmed | A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title_short | A simple and efficient multi-residue method based on quechers for pesticides determination in palm oil by liquid chromatography time-of-flight mass spectrometry |
| title_sort | simple and efficient multi residue method based on quechers for pesticides determination in palm oil by liquid chromatography time of flight mass spectrometry |
| topic | QD Chemistry |
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