23 research outputs found
Comparison of different modifications on QuEChERS sample preparation method for PAHs determination in black, green, red and white tea
A ambientalização curricular de programas de Educação Física em universidades federais do Brasil
Fast methods for the identification of suitable chemo‐enzymatic treatments of Kraft lignin to obtain aromatic compounds
Review of Functional Properties of Natural Fiber-Reinforced Polymer Composites: Thermal Insulation, Biodegradation and Vibration Damping Properties
Levels of organophosphorus pesticides in medicinal plants commonly consumed in Iran
<p>Abstract</p> <p>The frequent occurrence of pesticide residues in herbal materials was indicated by previous studies. In this study, the concentration of some of the organophosphorus pesticides including parathion, malathion, diazinon and pirimiphos methyl in different kinds of medicinal plants were determined. The samples were collected randomly from ten local markets of different areas of Iran. At the detection limit of 0.5 ng g<sup>-1</sup>, parathion and pirimiphos methyl were not detected in any of the samples<sub>.</sub> Some amounts of malathion and diazinon were found in <it>Zataria</it>, <it>Matricaria chamomile</it>, <it>Spearmint</it> and <it>Cumin</it> Seed samples while, the concentrations of target organophosphorus pesticides in <it>Borage</it> samples were below the detection limits of the methods which could be a result of intensive transformation of organophosphorus pesticides by <it>Borage</it>. In addition the organophosphorus pesticides were detected in all of the samples below the maximum residue levels (MRLs) proposed by the international organizations.</p