A matrix solid-phase dispersion method for the extraction of seven pesticides from mango and papaya
| Autor: | Sandro Navickiene, Adriano Aquino, Débora Santos Silva Bezerra |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Methyl Parathion
Chlorobenzenes Sensitivity and Specificity Gas Chromatography-Mass Spectrometry Analytical Chemistry Matrix (chemical analysis) chemistry.chemical_compound Thiabendazole Selected ion monitoring Pesticides Trichlorfon Tebuconazole Residue (complex analysis) Chromatography Mangifera Carica Extraction (chemistry) Solid Phase Extraction Imidazoles Pesticide Residues Reproducibility of Results General Medicine Triazoles Pyrimidines chemistry Pyrimethanil Gas chromatography Gas chromatography–mass spectrometry Food Analysis |
| Zdroj: | Journal of chromatographic science. 48(9) |
| ISSN: | 1945-239X |
| Popis: | A simple and effective extraction method based on matrix solid-phase dispersion was developed to determine trichlorfon, pyrimethanil, methyl parathion, tetraconazole, thiabendazole, imazalil, and tebuconazole in papaya and mango using gas chromatography-mass spectrometry with selected ion monitoring. Different parameters of the method were evaluated, such as type of solid-phase (silica-gel, neutral alumina, and Florisil), the amount of solid-phase, and eluent [dichloromethane, ethyl acetate-dichloromethane (4:1, 1:4, 1:1, 2:3, v/v)]. The best results were obtained using 2.0 g of mango or papaya, 3.0 g of silica as dispersant sorbent, and ethyl acetate-dichloromethane (1:1, v/v) as eluting solvent. The method was validated using mango and papaya samples fortified with pesticides at different concentration levels (0.05, 0.10, and 1.0 mg/kg). Average recoveries (4 replicates) ranged from 80% to 146%, with relative standard deviations between 1.0% and 28%. Detection and quantification limits for mango and papaya ranged from 0.01 to 0.03 mg/kg and 0.05 to 0.10 mg/kg, respectively. The proposed method was applied to the analysis of these compounds in commercial fruit samples from a local market (Aracaju/SE, Brazil), and residues of the pesticides were not detected on the samples. |
| Databáze: | OpenAIRE |
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