Evaluation of MCM-41 and MCM-48 mesoporous materials as sorbents in matrix solid phase dispersion method for the determination of pesticides in soursop fruit (Annona muricata)

Publication date: Available online 11 January 2019Source: Inorganic Chemistry CommunicationsAuthor(s): Luís Fabrício Santana Santos, Roberta Anjos de Jesus, José Arnaldo Santana Costa, Lucas Gabriel Teixeira Gouveia, Maria Eliane de Mesquita, Sandro NavickieneAbstractThe MCM-41 and MCM-48 mesoporous materials were tested for extraction of thiamethoxam, thiacloprid, thiophanate-methyl, teflubenzuron, and bifenthrin from the fruit of soursop (Annona muricata), using liquid chromatography with ultraviolet diode array detection as the analysis technique. Extractions performed at one fortification level (0.5 mg kg−1, n = 3) resulted in recoveries in the ranges 75–106% and 76–95% for MCM-41 and MCM-48, respectively, with relative standard deviations (n = 3) ranging from 5 to 9%. The detection and quantification limits for the pesticides studied were in the ranges of 0.02–0.06 mg kg−1 and 0.05–0.10 mg kg−1. The developed method was linear over the concentration range tested (0.01–5 mg kg−1), with correlation coefficients of between 0.9620 and 0.9999. Comparison of the mesoporous materials and a conventional sorbent (Florisil) revealed a similar performance for the pesticides.Graphical abstractThe textural and structural properties of material mesoporous after the surfactant extraction procedure.

Source: Inorganic Chemistry Communications - January 12, 2019 Category: Chemistry Source Type: research