Dissipation of Fungicides, Insecticides, and Acaricide in Tomato Using HPLC-DAD and QuEChERS Methodology

Autor: Sherif Hussein Abd Al-Rahman, Monir M. Almaz, Nevin S. Ahmed
Rok vydání: 2011
Předmět:
Zdroj: Food Analytical Methods. 5:564-570
ISSN: 1936-976X
1936-9751
DOI: 10.1007/s12161-011-9279-0
Popis: Excessive use of pesticides in tomato cultivation could lead to impact on environment and health. Here, dissipation rate of six widely used pesticides in growing tomatoes, namely, chlorothalonil, pymetrozine, metalaxyl-m, metalaxyl, abamectin, and propamocarb hydrochloride, was evaluated. Tomato samples were collected within 2 weeks after pesticides application, and the pesticide residues extracted by an optimized QuEChERS method and quantified by high-performance liquid chromatography combined with diode array detection. The half-life of these pesticides was found to be 2.06, 1.65, 19.8, 4.88, 1.06, and 1.29 days for chlorothalonil, pymetrozine, metalaxyl-m, metalaxyl, abamectin, and propamocarb hydrochloride, respectively. Preharvest intervals (PHI) for these pesticides ranged from 3 to 9 days, with the longest being for metalaxyl (9 days), followed by chlorothalonil and abamectin (6 days). Pymetrozine metalaxyl-m, and propamocarb hydrochloride had PHIs of 3, 4, and 4 days, respectively. Due to the immediate consumption of the tomatoes after harvest, the persistence of metalaxyl, chlorothalonil, and abamectin in the environment is expected to have an adverse health effect.
Databáze: OpenAIRE
Externí odkaz: