نتایج جستجو برای: quechers method
تعداد نتایج: 1630299 فیلتر نتایج به سال:
Organochlorine pesticides were tested in order to establish optimal conditions for rapid detection in dried leafy matrices, using DRS software. In tests we have used dried Trifolium pratense herba fortified with OC pesticide mix, processed with modified QuEChERS method. Instrumental analysis was carried out complying Agilent "key" condition, column of 15 m, in which case the retention time for ...
Innovative approach to increase sensibility and selectivity in analytical chemistry: QuEChERS method
Two rapid methods of sample preparation and analysis of fatty foods (e.g., milk, eggs, and avocado) were evaluated and compared for 32 pesticide residues representing a wide range of physicochemical properties. One method, dubbed the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method for pesticide residue analysis, entailed extraction of 15 g sample with 15 mL acetonitrile (MeCN)...
Study on The Use of QuEChERS Method for Analysis of Organochlorine Pesticides Residues in Cow's Milk
QuEChERS stands for (Quick, Easy, Cheap, Effective, Rugged and Safe) and pronounced as (catchers) is a method that had been developed for multi-pesticide residue analyses in food. This study was conducted to investigate the efficacy of QuEChERS method for analyzing the organochlorine pesticides residues in cow's milk. Twenty organochlorine pesticide namely (Benzene, 1,3,5-trichloro, Tetrachloro...
Current Trends in Liquid-Liquid Microextraction for Analysis of Pesticide Residues in Food and Water
Since the middle of last century, the use of organic synthetic pesticides became a widespread practice, in order to better prevent, control and destroy pests. Despite their usefulness in the increment of food production, the extensive use of pesticides during production, processing, storage, transport or marketing of agricultural commodities can led to environmental contamination and to the pre...
A fast and simple modified QuEChERS (quick, easy, cheap, rugged and safe) extraction method based on spiked calibration curves and direct sample introduction was developed for determination of benzo[a]pyrene (BaP) in bread by gas chromatography-mass spectrometry single quadrupole selected ion monitoring (GC/MS-SQ-SIM). Sample preparation includes extraction of BaP into acetone followed by clean...
Este estudo comparou quatro procedimentos de extração para a determinação simultânea das micotoxinas citrinina e ocratoxina A em amostras de arroz. Os procedimentos de Soares e Rodriguez-Amaya, Tanaka e os métodos de extração QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) e por ultrassom foram comparados em termos de geração de resíduos, limite de detecção, limite de quantificação e ...
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