Dimethoate degradation in plants and during processing of yerba maté leaves

Brazilian Archives of Biology and Technology

Miguel E. Schmalko²  Laura A. Ramallo²  Darío Ferreira²  Rubén D. Berlingheri¹ 

[1] ,Universidad Nacional de Misiones Facultad de Ciencias Exactas; Químicas y Naturales Centro de Investigación y Desarrollo TecnológicoPosadas Misiones ,Argentina

关键词: Dimethoate;    pesticide;    degradation;    processing;    Ilex paraguariensis;    yerba maté;   

DOI  :  10.1590/S1516-89132002000600003

来源: SciELO

【 摘 要 】

The objective of this research was to study degradation kinetics of dimethoate in plants of Ilex paraguariensis Saint Hilaire (or yerba maté) and during its processing. To determine dimethoate concentration, a capillary gas chromatography technique with a mass selective detector was used. Half-life times in plants ranked between 9.8 and 11.8 days. During processing, with a blanching and two drying steps, dimethoate concentration decayed to a 22.7% of its initial value (in dry basis); while during seasoning step (at 45°C), half-life time was 17.3 days. With these values, preharvest safety interval was determined.

【 授权许可】

CC BY-NC   
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