Transfer of pesticides to the brew during mate drinking process and their relationship with physicochemical properties.
In order to evaluate the extraction of pesticide residues that are transferred to the brew during mate drinking process of P.U.1 yerba mate leaves (Ilex paraguariensis), a special device to simulate the way in which mate is drunk in Uruguay was developed. The transfer to the brew of 12 organophosphates, 5 synthethic pyrethroids and one organochlorine pesticide from spiked samples was studied. The relationship between the transfer data thus obtained and physicochemical properties like water solubility (Ws), octanol-water coefficient (Kow) and Henry's constant (H) was evaluated. The extractability of the pesticide residues from yerba mate can be correlated with log Ws and log Kow. These transfer values allowed the calculation of ARLs (acceptable residue level) for the pesticides following Food and Agriculture Organization (FAO), World Health Organizaion (WHO) guidelines. These results can help the future establishment of maximum residue levels (MRLs).
Departamento de Química Orgánica, Universidad de la República, Montevideo, Uruguay.
Andrés
A
Pérez-Parada
Joaquín
J
González
Lucía
L
Pareja
Lucía
L
Geis-Asteggiante
Marcos
M
Colazzo
Silvina
S
Niell
Natalia
N
Besil
Gabriel
G
González
Verónica
V
Cesio
Horacio
H
Heinzen
D001628:Beverages / Q000032:analysis*; D055598:Chemical Phenomena; D004326:Drinking; D006801:Humans; D030019:Ilex paraguariensis / Q000737:chemistry*; D010573:Pesticide Residues / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D014583:Uruguay
D010573:Pesticide Residues