Simple Determination of 40 Organophosphate Pesticides in Raw Wool Using Microwave-Assisted Extraction and GC-FPD Analysis

Abstract

A validated analytical method for the multiresidue analysis of 40 organophosphate pesticides (OPs) and conversion products in raw wool has been developed. The method is based on the selective microwave-assisted extraction (MAE) of raw wool with acetonitrile and analysis of extracts by gas chromatography-flame photometric detector. The optimum MAE conditions were 20 min duration at 80 °C with 30 mL of acetonitrile per gram of wool. A validation study was performed according to the European SANCO guidelines 10684/2009. Limits of detection and quantification for all pesticides tested were from 0.01 to 0.2 mg/kg and from 0.2 to 1.0 mg/kg, respectively. The average recoveries of pesticides spiked at different levels were in the range of 70-120% with relative standard deviations of ≤ 20%. The extraction performance was compared to the one obtained with a reference Soxhlet extraction. The method was also applied in the analysis of real wool (after field application) samples.

Determination of plant growth regulators in pears by microwave‐assisted extraction and liquid chromatography with electrospray ionization mass spectrometry

“…The investigation has revealed that MAE is a more environmentally friendly process with economic advantages than the current extraction methods . MAE techniques have been developed as important means of extracting pesticides from different matrices and are gaining an important role in sample preparation .…”

Pesticide Residues in Natural Products with Pharmaceutical Use: Occurrence, Analytical Advances and Perspectives

“…In a previous study, our group found residues of chlorpyriphos, cypermethin, diazinon and ethion in Uruguayan lanolin samples (Pérez et al, 2010). Furthermore, when recently searching for 40 OPs residues in raw sheep wool from Uruguay, the extracted wool wax was found only containing diazinon and ethion residues (Niell et al, 2011).…”

Design and performance evaluation of ionic liquid-based microwave-assisted simultaneous extraction of kaempferol and quercetin from Chinese medicinal plants

“…Besides, studies in vivo and in vitro have proven that quercetin is a potential chemopreventive and chemotherapeutic agent for cancer. [28][29][30] Kaempferol (3,4 0 ,5,7-tetrahydroxy-2-phenylchromen-4-one), whose structure is shown in Fig. 1(B), has been proven by a series of pharmacological experiments to exhibit a lot of biological activities, such as resisting anxiety and oxidation, 31,32 ameliorating hyperglycemia, 33 diminishing inammation, etc.…”