RESUMO
A new composite was synthesized by the hydrothermal method using a 3D coordination network [Ln2(C4H4O4)3(H2O)2]·H2O (Ln = Eu and Tb) and activated carbon. The coordination network is formed within the pores of the charcoal, allowing for the use of this material as a detoxifying agent.
Assuntos
Aldicarb/administração & dosagem , Inibidores da Colinesterase/administração & dosagem , Complexos de Coordenação/administração & dosagem , Európio/administração & dosagem , Térbio/administração & dosagem , Adsorção , Aldicarb/química , Animais , Carbono/química , Carvão Vegetal/administração & dosagem , Carvão Vegetal/química , Inibidores da Colinesterase/química , Complexos de Coordenação/química , Európio/química , Trato Gastrointestinal/efeitos dos fármacos , Trato Gastrointestinal/patologia , Mucosa Intestinal/efeitos dos fármacos , Mucosa Intestinal/patologia , Camundongos , Microvilosidades/efeitos dos fármacos , Microvilosidades/patologia , Porosidade , Ratos , Térbio/químicaRESUMO
An analytical method for the determination of aldicarb, and its two major metabolites, aldicarb sulfoxide and aldicarb sulfone in fruits and vegetables is described. Briefly the method consisted of the use of a methanolic extraction, liquid-liquid extraction followed by solid-phase extraction clean-up. Afterwards, the final extract is analyzed by liquid chromatography-atmospheric pressure chemical ionization mass spectrometry (LC-APCI-MS). The specific fragment ion corresponding to [M-74]+ and the protonated molecular [M+H]+ ion were used for the unequivocal determination of aldicarb and its two major metabolites. The analytical performance of the proposed method and the results achieved were compared with those obtained using the common analytical method involving LC with post-column fluorescence detection (FL). The limits of detection varied between 0.2 and 1.3 ng but under LC-FL were slightly lower than when using LC-APCI-MS. However both methods permitted one to achieve the desired sensitivity for analyzing aldicarb and its metabolites in vegetables. The method developed in this work was applied to the trace determination of aldicarb and its metabolites in crop and orange extracts.