14C-dimethoate residues in olive oil during oil processing

• Published in: Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Pesticides, food contaminants, and agricultural wastes, 1999-05, Vol.34 (3), p.413-429
• Main Authors: Gozek, K. (Turkish Atomic Energy Authority, Saray, Ankara-Turkey.), Yucel, U, Ilim, M, Aysal, P, Tuncbilek, A.S
• Format: Article
• Language: English
• Subjects: ACEITE DE OLIVA; ALIMENTOS; Biological and medical sciences; BLANCHISSEMENT; BLANQUEADURA; BLEACHING; Carbon Radioisotopes; Chromatography, Thin Layer; CONTAMINACION; CONTAMINATION; DEODORIZING; DESODORISATION; DESODORIZACION; DIMETHOATE; Dimethoate - analysis; dimethoxon residues; DIMETOATO; effect of refining process; Food Contamination; Food Handling; Food industries; FOOD SAFETY; FOOD TECHNOLOGY; Food toxicology; FOODS; Fundamental and applied biological sciences. Psychology; HUILE D'OLIVE; INNOCUITE DES PRODUITS ALIMENTAIRES; INOCUIDAD ALIMENTARIA; INSECTICIDAS; INSECTICIDE; INSECTICIDES; Insecticides - analysis; NEUTRALISATION; NEUTRALIZACION; NEUTRALIZATION; OLIVE OIL; Pesticide Residues - analysis; Plant Oils - chemistry; PRODUIT ALIMENTAIRE; REFINING PROCESS EFFECTS; RESIDU; RESIDUES; RESIDUOS; TECHNOLOGIE ALIMENTAIRE; TECNOLOGIA DE LOS ALIMENTOS; TURKEY; TURQUIA; TURQUIE
• ISSN: 0360-1234; 1532-4109
• DOI: 10.1080/03601239909373206

An olive tree was treated twice in the field with 14 C-dimethoate (237.7 (μCi, 2.4 g) and 14 C residues were determined in the olive fruits at harvest. The fruits were crushed and pressed to extract the crude oil, then refined by neutralization, bleaching and deodorization. The crude oil contained 14.1% of the total 14 C in the olive fruits. Neutralization resulted in a reduction of 14 C by about 50% of the total 14 C residues in oil. Bleaching and deodorization processes further reduced the 14 C residues and the refined oil contained 31.6% (which corresponds to 4.4% of I4 C residues of the total 14 C in olive fruits) of the total 14 C in the crude oil. Industrially extracted crude oil was fortified with 14 C-dimethoate at 1.8 mg kg -1 (0.02 μCi) level and subjected to the same refining process. A sharp decrease in the amount of 14 C was observed by neutralization and the amount of 14 C remaining in the refined oil was about 7.3% of the total l4 C in the crude fortified oil. The data suggest that the 14 C residues in the aged and the fortified oil amples were not of the same nature. The terminal 14 C residue in the refined oil obtained from the field experiment did not contain dimethoate and/or its oxon.