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Showing 1 to 12 of 12 for “"QuEChERS"”.
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QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) Extraction – Gas Chromatography for the Analysis of Drugs
<p>QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) is an extraction technique developed by Anastassiades and co-workers initially for the extraction of veterinary drugs from animal tissue. Since its inception, it was discovered that this method is particularly adept for the extraction of …
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Comparing Extraction Methods in Sample Preparation for the Quantification of Cannabinoids in Industrial Hemp
… (CBN). Extraction methods evaluated include: QuEChERS, diethyl ether, ethanol, and methanol. Extracts obtained via these methods were subject to quantitative cannabinoid analysis by UPLC/PDA. Standard curves for quantification of each cannabinoid were constructed using authentic standards for …
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Development of multi-mycotoxin UHPLC-MS/MS methods and application to oat and beer samples
… interest. A rapid, mechanically-assisted, QuEChERS-based sample preparation was employed. The simple and straightforward protocol provided a high degree of accuracy and sample throughput, allowing a single laboratory operator to process up to 60-70 samples a day. The methodology was …
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A More Efficient Method for Extracting and Analyzing Pesticides in Baby foods
… will improve percent recoveries by modifying the QuEChERS methods. This proposal entails spiking fruit matrices with known amounts of pesticides and studying percent recoveries by quantifying the extracts with standard instruments like High-performance liquid chromatography-photodiode array …
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Lichens as biomonitors for atmospheric polycyclic aromatic hydrocarbons
… quick, easy, cheap, effective, rugged and safe (QuEChERS) technique using n-‐ hexane:acetone (1:1, v/v), never before applied to lichens, provided the best recoveries of internal standards (deuterated phenanthrene and pyrene), the highest total peak area for all PAHs of interest and relative …
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Desarrollo de estrategias analíticas de microextracción de compuestos estrogénicos desde matrices líquidas para ser evaluados por cromatografía líquida con analizador de tiempo de vuelo y detector de masas (LC-TOF/MS)
… estrógenos desde leche se utilizó la metodología QuEChERS citrato y para limpiar el extracto obtenido se utilizó SPE con el sorbente divinilbenceno-co-N-vinilpirrolidona, obteniéndose recuperaciones entre el 90 y 123% con valores de RSD menores al 18%. Los límites de detección y cuantificación de …
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Penetration of Carcinogen Across Porcine Esophagus and Applications of Disposable Pipette Extraction for Forensic Toxicology and Food Safety by Gas and Liquid Chromatography/Mass Spectrometry
… products is tedious work. An automated QuEChERS method (quick, easy, cheap, effective, rugged and safe) was developed for rapid analysis of over 200 pesticides using GC/MS and LC/MS/MS with recoveries that ranged from 70-117% (%RSD<14 >%). An automated DPX followed by LC/MS/MS was used …
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Advanced systems for the rapid detection of anthelmintic drugs in food
… drugs in liver tissue and milk using a QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) extraction procedure. The first screening assay was developed to detect 11 benzimidazole carbamates in milk and liver. In bovine milk the assay showed a limit of detection (LOD) of 2.7 μg …
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Measurement and risk assessment of endocrine disruptors present in sport supplements
… dispersive solid phase extraction known as the ‘QuEChERS’ method. Validation was followed by the analysis of certified negative and positive control samples (Chapter 3) provided by the Horseracing Forensic Laboratory (HFL), UK. Consequently, the screening of 116 sport supplements available on the …
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The application of active and passive bioaccumulation methods to measure metallic and organic pollutants along the Namibian coastline
… were analysed in both SPMD and mussels following QuECHERS extraction methods and using a GC-20230 Plus coupled with a GCMS-TQ8050 NX triple quadruple mass spectrometer. The element levels in all AMs were significantly lower (p<0.05) when compared to mussels and did not show a significant increase …
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Monitoring of Persistent Organic Pollutants (POPs) in marine biota from the Catania Gulf (Sicily, Italy) and development of new sensitive analytical methods for their detection
… to remove potential interferences, a modified QuEChERS extraction and GC-MS methodologies were developed and implemented for the quantification of 16 priority PAHs, 29 PCB and 23 OCPs in muscle fish and the developed methods were validated according to UNI ENI ISO 17025. The methods for PAHs …
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Quantification of pyrethroid and organophosphate metabolites in hair and urine samples of rural children from the Western Cape, South Africa using the two-dimensional gas chromatography-mass spectrometry
… extraction techniques were optimized, utilizing QuEChERS for urine samples and solid-liquid extraction for hair samples. This was followed by the fine-tuning of metabolite derivatization using N-tert- butyldimethylsilyl-N-methyltrifluoroacetamide (MTBSTFA) to ensure efficient analysis. The choice …