Multiresidue analysis of pesticides in vegetables and fruits using a high capacity absorbent polymer for water
| Autor: | Masahiro Okihashi, Hirotaka Obana, Shinjiro Hori, Sachiko Kakimoto, Kazuhiko Akutsu |
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| Rok vydání: | 1999 |
| Předmět: |
Chromatography
Pesticide residue biology Elution Pesticide Residues Ethyl acetate Food Contamination Orange (colour) Pesticide biology.organism_classification Sensitivity and Specificity Biochemistry Analytical Chemistry chemistry.chemical_compound chemistry Fruit Vegetables Electrochemistry Environmental Chemistry Asparagus Sample preparation Spectroscopy Legume |
| Zdroj: | The Analyst. 124:1159-1165 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/a903297e |
| Popis: | A single extraction and a single clean-up procedure was developed for multi-residue analysis of pesticides in non-fatty vegetables and fruits. The method involves the use of a high capacity absorbent polymer for water as a drying agent in extraction from wet food samples and of a graphitized carbon column for clean-up. A homogeneously chopped food sample (20 g) and polymer (3 g) were mixed to absorb water from the sample and then 10 min later the mixture was vigorously extracted with ethyl acetate (100 ml). The extract (50 ml), separated by filtration, was loaded on a graphitized carbon column without concentration. Additional ethyl acetate (50 ml) was also eluted and both eluates were concentrated to 5 ml for analysis. The procedure for sample preparation was completed within 2 h. In a recovery test, 107 pesticides were spiked and average recoveries were more than 80% from asparagus, orange, potato and strawberry. Most pesticides were recovered in the range 70-120% with usually less than a 10% RSD for six experiments. The results indicated that a single extraction with ethyl acetate in the presence of polymer can be applied to the monitoring of pesticide residues in foods. |
| Databáze: | OpenAIRE |
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