Evaluation of a recent product to remove lipids and other matrix co-extractives in the analysis of pesticide residues and environmental contaminants in foods
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| Autores: | , , , |
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| Formato: | artículo original |
| Fecha de Publicación: | 2016 |
| Descripción: | This study demonstrates the application of a novel lipid removal product to the residue analysis of 65 pesticides and 52 environmental contaminants in kale, pork, salmon, and avocado by fast, low pressure gas chromatography – tandem mass spectrometry (LPGC–MS/MS). Sample preparation involves QuEChERS extraction followed by use of EMR-Lipid (“enhanced matrix removal of lipids”) and an additional salting out step for cleanup. The optimal amount of EMR-Lipid was determined to be 500 mg for 2.5 mL extracts for most of the analytes. The co-extractive removal efficiency by the EMR-Lipid cleanup step was 83–98% for fatty samples and 79% for kale, including 76% removal of chlorophyll. Matrix effects were typically less than ±20%, in part because analyte protectants were used in the LPGC–MS/MS analysis. The recoveries of polycyclic aromatic hydrocarbons and diverse pesticides were mostly 70–120%, whereas recoveries of nonpolar polybrominated diphenyl ethers and polychlorinated biphenyls were mostly lower than 70% through the cleanup procedure. With the use of internal standards, method validation results showed that 76–85 of the 117 analytes achieved satisfactory results (recoveries of 70–120% and RSD ≤ 20%) in pork, avocado, and kale, while 53 analytes had satisfactory results in salmon. Detection limits were 5–10 ng/g for all but a few analytes. EMR-Lipid is a new sample preparation tool that serves as another useful option for cleanup in multiresidue analysis, particularly of fatty foods. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/74411 |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0021967316304927?via%3Dihub https://hdl.handle.net/10669/74411 |
| Access Level: | acceso abierto |
| Palabra clave: | EMR-Lipid Cleanup QuEChERS Sample preparation Pesticide residue analysis Analyte protectants Environmental contaminants Foods Fast GC-MS/MS |