Relationship between Dieldrin Uptake in Cucumber and Solvent-Extractable Residue in Soil

• Published in: Journal of agricultural and food chemistry 2009-12, Vol.57 (23), p.11261-11266
• Main Authors: Sakai, Mizuki, Seike, Nobuyasu, Murano, Hirotatsu, Otani, Takashi
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; cucumbers; Cucumis sativus; Cucumis sativus - metabolism; dieldrin; Dieldrin - chemistry; Dieldrin - metabolism; Environmental Chemistry; food contamination; Food industries; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; insecticide residues; Insecticides - chemistry; Insecticides - metabolism; Pesticide Residues - chemistry; Pesticide Residues - metabolism; Soil Pollutants - chemistry; Soil Pollutants - metabolism; soil pollution; solvents; Solvents - chemistry; uptake mechanisms
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf902573k

To prevent the distribution of cucumbers with dieldrin contamination exceeding the limit set by the Japanese Food Sanitation Law, the extraction solvent for dieldrin-contaminated soil was selected prior to cultivation so that the dieldrin residue level in cucumber could be predicted. The exhaustive extraction from soil could not explain the dieldrin uptake by cucumber plants. However, significant correlation (R 2 = 0.966, P < 0.001) was observed between dieldrin concentrations in cucumber and dieldrin concentrations extracted with 50% (v/v) methanol−water solution from soils. This was a result of the phytoavailability of dieldrin to the cucumber plants. The extractability of soil dieldrin with the methanol−water solution decreased as the organic carbon content in the soils increased. This suggested that a 50% (v/v) methanol−water solution is the optimal solution for predicting dieldrin concentrations in cucumbers by soil analysis.