| Autor: |
Mohammad Reza Ganjali, Mohammad Reza Milani Hosseini, Araz Bidari, Yaghoub Assadi, Parviz Norouzi |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Food Chemistry. 126:1840-1844 |
| ISSN: |
0308-8146 |
| DOI: |
10.1016/j.foodchem.2010.11.142 |
| Popis: |
A very simple and economic method for organophosphorus pesticides (OPPs) residues analysis in tomato by means of gas chromatography–flame photometric detection (GC–FPD) has been developed. The method involves a rapid and small-scale extraction. The sample was homogenised and extraction of the OPPs with acetone was carried out assisted by sonication. No clean-up or evaporation were required after extraction. Pre-concentration of the OPPs from the acetone extract was done by using dispersive liquid–liquid microextraction (DLLME) technique. Chlorobenzene was added in micro-level volume as extraction solvent and triphenylphosphate as internal standard in DLLME procedure. The method showed good linearity over the range assayed (0.5–1000 μg kg −1 ) and the detection limits for the pesticides studied varied from 0.1 to 0.5 μg kg −1 . Repeatability studies resulted a relative standard deviation lower than 10% in all cases. The proposed method was used to determine pesticides levels in tomatoes grown in open field. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect