The method for simultaneous determination of 20 organophosphorus pesticide residues in corn samples has been developed and validated. For the extraction of organophosporus pesticide residues from the samples, the accelerated solvent technique with the mixture of dichloromethane: acetone (1:1, V/V) was used. Clean up was done using liquid – liquid extraction with n – hexane, followed by solid phase extraction on primary secondary amine adsorbent, and elution with the mixture of acetone: toluene (65:35). The determination of the pesticides was carried out by gas chromatography with nitrogen phosphorus detection. Separation and quantitative determination of the analytes were performed on a fused silica capillary ZB-35 column (30 m x 0.25 mm i.d. x 0.25 µm, Phenomenex). The recovery was investigated in blank corn samples fortified with mevinphos, diazinon, dimethoate, bromofos-methyl, chlorfenvinphos, fenamiphos, ethion and phosalone at 5 ng/g, 10 ng/g, 15 ng/g , 20 ng/g and 25 ng/g, respectively and with methacrifos, phorate, etrimfos, parathion-methyl, pirimiphos - methyl, fenitrothion, chlorpyrifos, malathion, parathion, bromofos-ethyl, phosmet and azinphos-methyl at 10 ng/g, 20 ng/g, 30 ng/g, 40 ng/g and 50 ng/g, respectively. The recovery ranged from 76.0% to 112.0%. Repeatability expressed as relative standard deviation (RSD) was less than 8.2%. Linearity expressed as correlation coefficient (R2) ranged from 0.9935 to 0.9996. Measurement uncertainty (Ux) was lower than 14.2% for all tested pesticides. The limits of quantification (LOQ) were bellow 5 ng/g for all tested pesticides. The satisfactory Z-score results of international proficiency tests confirm good analytical performances of the developed method.
| Published in | American Journal of Applied Chemistry (Volume 2, Issue 4) |
| DOI | 10.11648/j.ajac.20140204.11 |
| Page(s) | 46-54 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2014. Published by Science Publishing Group |
Organophosporus Pesticide Residues, Gas Chromatography, Accelerated Solvent Extraction, Solid Phase Extraction
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APA Style
Vesna Kostik, Biljana Gjorgeska, Bistra Angelovska. (2014). Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection. American Journal of Applied Chemistry, 2(4), 46-54. https://doi.org/10.11648/j.ajac.20140204.11
ACS Style
Vesna Kostik; Biljana Gjorgeska; Bistra Angelovska. Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection. Am. J. Appl. Chem. 2014, 2(4), 46-54. doi: 10.11648/j.ajac.20140204.11
AMA Style
Vesna Kostik, Biljana Gjorgeska, Bistra Angelovska. Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection. Am J Appl Chem. 2014;2(4):46-54. doi: 10.11648/j.ajac.20140204.11
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Download@article{10.11648/j.ajac.20140204.11,
author = {Vesna Kostik and Biljana Gjorgeska and Bistra Angelovska},
title = {Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection},
journal = {American Journal of Applied Chemistry},
volume = {2},
number = {4},
pages = {46-54},
doi = {10.11648/j.ajac.20140204.11},
url = {https://doi.org/10.11648/j.ajac.20140204.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajac.20140204.11},
abstract = {The method for simultaneous determination of 20 organophosphorus pesticide residues in corn samples has been developed and validated. For the extraction of organophosporus pesticide residues from the samples, the accelerated solvent technique with the mixture of dichloromethane: acetone (1:1, V/V) was used. Clean up was done using liquid – liquid extraction with n – hexane, followed by solid phase extraction on primary secondary amine adsorbent, and elution with the mixture of acetone: toluene (65:35). The determination of the pesticides was carried out by gas chromatography with nitrogen phosphorus detection. Separation and quantitative determination of the analytes were performed on a fused silica capillary ZB-35 column (30 m x 0.25 mm i.d. x 0.25 µm, Phenomenex). The recovery was investigated in blank corn samples fortified with mevinphos, diazinon, dimethoate, bromofos-methyl, chlorfenvinphos, fenamiphos, ethion and phosalone at 5 ng/g, 10 ng/g, 15 ng/g , 20 ng/g and 25 ng/g, respectively and with methacrifos, phorate, etrimfos, parathion-methyl, pirimiphos - methyl, fenitrothion, chlorpyrifos, malathion, parathion, bromofos-ethyl, phosmet and azinphos-methyl at 10 ng/g, 20 ng/g, 30 ng/g, 40 ng/g and 50 ng/g, respectively. The recovery ranged from 76.0% to 112.0%. Repeatability expressed as relative standard deviation (RSD) was less than 8.2%. Linearity expressed as correlation coefficient (R2) ranged from 0.9935 to 0.9996. Measurement uncertainty (Ux) was lower than 14.2% for all tested pesticides. The limits of quantification (LOQ) were bellow 5 ng/g for all tested pesticides. The satisfactory Z-score results of international proficiency tests confirm good analytical performances of the developed method.},
year = {2014}
}
TY - JOUR T1 - Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection AU - Vesna Kostik AU - Biljana Gjorgeska AU - Bistra Angelovska Y1 - 2014/08/10 PY - 2014 N1 - https://doi.org/10.11648/j.ajac.20140204.11 DO - 10.11648/j.ajac.20140204.11 T2 - American Journal of Applied Chemistry JF - American Journal of Applied Chemistry JO - American Journal of Applied Chemistry SP - 46 EP - 54 PB - Science Publishing Group SN - 2330-8745 UR - https://doi.org/10.11648/j.ajac.20140204.11 AB - The method for simultaneous determination of 20 organophosphorus pesticide residues in corn samples has been developed and validated. For the extraction of organophosporus pesticide residues from the samples, the accelerated solvent technique with the mixture of dichloromethane: acetone (1:1, V/V) was used. Clean up was done using liquid – liquid extraction with n – hexane, followed by solid phase extraction on primary secondary amine adsorbent, and elution with the mixture of acetone: toluene (65:35). The determination of the pesticides was carried out by gas chromatography with nitrogen phosphorus detection. Separation and quantitative determination of the analytes were performed on a fused silica capillary ZB-35 column (30 m x 0.25 mm i.d. x 0.25 µm, Phenomenex). The recovery was investigated in blank corn samples fortified with mevinphos, diazinon, dimethoate, bromofos-methyl, chlorfenvinphos, fenamiphos, ethion and phosalone at 5 ng/g, 10 ng/g, 15 ng/g , 20 ng/g and 25 ng/g, respectively and with methacrifos, phorate, etrimfos, parathion-methyl, pirimiphos - methyl, fenitrothion, chlorpyrifos, malathion, parathion, bromofos-ethyl, phosmet and azinphos-methyl at 10 ng/g, 20 ng/g, 30 ng/g, 40 ng/g and 50 ng/g, respectively. The recovery ranged from 76.0% to 112.0%. Repeatability expressed as relative standard deviation (RSD) was less than 8.2%. Linearity expressed as correlation coefficient (R2) ranged from 0.9935 to 0.9996. Measurement uncertainty (Ux) was lower than 14.2% for all tested pesticides. The limits of quantification (LOQ) were bellow 5 ng/g for all tested pesticides. The satisfactory Z-score results of international proficiency tests confirm good analytical performances of the developed method. VL - 2 IS - 4 ER -
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