Residue Levels of Ethoxyquin, Imazalil, and Iprodione in Pears under Cold-Storage Conditions

• Published in: Journal of agricultural and food chemistry 1999-08, Vol.47 (8), p.3228-3236
• Main Authors: López, M. L, Riba, M
• Format: Article
• Language: English
• Subjects: Aminoimidazole Carboxamide - analogs & derivatives; Aminoimidazole Carboxamide - analysis; Biological and medical sciences; cold storage; Drug Residues - analysis; ethoxyquin; Ethoxyquin - analysis; food analysis; Food industries; Food Preservation; Food toxicology; Fruit; Fruit and vegetable industries; fruit pulp; Fundamental and applied biological sciences. Psychology; fungicide residues; Fungicides, Industrial - analysis; gas chromatography; Gas Chromatography-Mass Spectrometry; Hydantoins; imazalil; Imidazoles - analysis; iprodione; pears; peel; Refrigeration
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf990117a

A gas chromatographic method is presented for the simultaneous determination of the antiscald ethoxyquin and the fungicides imazalil and iprodione in peel and pulp of Blanquilla pears. Fruits were cold-stored in commercial chambers in normal atmosphere and in controlled atmosphere with low oxygen content (oxygen and carbon dioxide were held at 2.5% and 1.5%, respectively). The method uses gas−liquid chromatography (GLC) with an alkaline flame ionization detector (detector of N−P, NPD) and allows the detection of the mentioned compounds to minimum levels of 0.08−0.12 mg/kg in fresh fruit. With this system the evolution of residues in fruit was monitored throughout the period of cold storage. In the surveys carried out the residue levels of these compounds were found to be below the limits allowed by the legislation of European Union. For the three studied products residues in pulp are lower and disappear more quickly than in peel. Keywords: Residue analysis; chromatographic methods; alkaline flame ionization detector; ethoxyquin; imazalil; iprodione; controlled atmosphere; pear; Blanquilla