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Méthode QuEChERS de préparation d'échantillons
La méthode QuEChERS (de l'anglais "Quick, Easy, Cheap, Effective, Rugged and Safe" pour rapide, facile, abordable, efficace, robuste et sûre) est une méthode de nettoyage d'échantillons utilisée pour préparer les échantillons agro-alimentaires et agricoles en vue d'une analyse de pesticides.
Matériaux de référence
Étalons de référence chimiques de chromatographie (HPLC, GC), de spectroscopie (SAA, ICP) et de propriétés physiques pour des applications en analyse pharmaceutique, environnementale, pétrochimique, agro-alimentaire, médico-légale et analyse de traces.
Chromatographie sur couche mince
La chromatographie sur couche mince (CCM ou TLC) est une technique de séparation fondée sur la séparation différentielle de composés entre une surface solide, recouverte d'une fine couche d'adsorbant, et un solvant liquide qui se déplace sur la surface solide
Étalonnage, qualification et validation
Les matériaux de référence sont essentiels à la validation de méthode, l'étalonnage, la qualification et la mesure de l'incertitude. Il est vital de choisir correctement le matériau de référence le plus adapté à l'application concernée, car l'exactitude des résultats dépend
Chromatographie liquide basse pression (LPLC)
La chromatographie liquide basse pression (LPLC) est une technique chromatographique dans laquelle une pompe applique une faible pression pour pousser une phase mobile dans une colonne contenant une phase stationnaire.
Extraction en phase solide et QuEChERS
Explorez notre site pour découvrir notre gamme complète de systèmes, dispositifs et produits pour l'extraction en phase solide (SPE), notamment des cartouches, tubes en verre, plaques de 96 puits, tubes QuEChERS (SPE dispersive), systèmes de SPE en ligne et systèmes
Chromatographie en phase gazeuse (CPG/GC)
La chromatographie en phase gazeuse est une technique analytique courante permettant de séparer et d'analyser des composés volatils en phase gazeuse. La GC est appliquée dans de nombreuses industries pour le contrôle qualité, et pour identifier et/ou quantifier les composés
HPLC de grosses molécules
La chromatographie liquide haute performance (HPLC) peut être utilisée pour séparer et identifier différentes biomolécules de grande taille, telles que les protéines et les peptides, d'un échantillon. Cette technique consiste à pomper, sous haute pression, un échantillon avec un solvant
Neonicotinoids Pesticides and Metabolites
Sigma-Aldrich.com presents an article concerning Neonicotinoids Pesticides and Metabolites.
Pesticides and Mycotoxins in Cannabis/Hemp
Stringent quality testing for cannabis products includes analysis for residual pesticides and mycotoxins using LC-MS/MS and GC-MS/MS.
GC Analysis of Agricultural Pesticides (Standard) on SLB®-5ms
GC Analysis of Agricultural Pesticides (Standard) on SLB®-5ms
Pesticide Standards
We offer a complete range of pesticide reference material standards with a variety of quality grades such as analytical standard grade (PESTANAL®), reference material or certified reference material (TraceCERT®) grade for food, environmental analyses.
Extraction and Analysis of Agricultural Pesticides from Oranges Using the “QuEChERS” Method
Extraction and Analysis of Agricultural Pesticides from Oranges Using the “QuEChERS” Method
Comparison of QuEChERS Products for the Extraction of Planar Pesticides from Spinach
Supel™ QuE Verde combines a novel carbon with zirconia coated silica (Z-Sep+) to provide an optimum balance between planar pesticide recovery and color removal.
HPLC Analysis of Urea, Carbamate, Triazine, Aniline Pesticides on Discovery® C18
HPLC Analysis of Urea, Carbamate, Triazine, Aniline Pesticides on Discovery® C18
Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking
Extraction of Permethrin Pesticides from Spinach Using QuEChERS Methodology with Automated Shaking
Pesticide Classes and Exposure Hazards
Pesticide classes and health hazards from exposure to commercially available pesticides, herbicides, and fungicides.
US EPA Method 8081: GC Analysis of Organochlorine Pesticides on Equity®-5
US EPA Method 8081: GC Analysis of Organochlorine Pesticides on Equity®-5
Reduce Matrix Background and Improve Overall Analyte Recovery for the Analysis of Pesticides in Beef Kidney
Supel QuE Z-Sep+ was successfully demonstrated for cleanup of beef kidney matrix, providing reduced background and less interference in the GC-MS analysis of the target pesticides
Analysis of Pesticides in Baby Food by Solid Phase Microextraction (SPME) Using a New Overcoated Fiber
A direct immersion SPME method using a new overcoated SPME fiber was developed for the extraction of pesticides from pureed prune baby food.
Extraction and Analysis of Neonicotinoid Pesticides from Flower Blossoms Using Supel™ QuE and Ascentis® Express
Extraction and Analysis of Neonicotinoid Pesticides from Flower Blossoms Using Supel™ QuE and Ascentis® Express
QuEChERS Method for Pesticide Residue Analysis
QuEChERS method for pesticide residue analysis requires only small quantities of solvent and is capable of generating recoveries of 70-120% with RSDs <5% for a wide range of compounds.
Improved Recoveries and Lower Background for GC/MS/MS and LC/MS/MS Analysis of Pesticides in Green Tea
A procedure for cleanup of green tea extracts provides low background and allowed for the analysis of more pesticides at lower levels than QuEChERS. Uses less solvents and no toluene.
US EPA Method 632: HPLC Analysis of Pesticides on Ascentis® C18
-methylcarbamate 10 μg/mL; Diuron; Propham; Siduron; Methiocarb, analytical standard; Linuron 10 μg/mL; Swep 10 μg/mL; Chlorpropham 10 μg/mL; Barban; Neburon
Foodborne Pesticide Analysis: Going Beyond the Dirty Dozen
Get a better understanding of the various global regulations around pesticide analysis in food science and the right product for each method. Discover pesticide residue tests and applications from Fipronil for eggs to pesticides in cannabis.
Dual-Column GC Analysis of Organochlorine Pesticides on SLB®-5ms and SLB®-35ms
The primary column is used to determine presence of the target analytes in the sample; the secondary column of a different selectivity confirms whether a positive match.
Analysis of Pesticides in Turmeric Powder by LC/MS/MS and GC/MS/MS after Cleanup with Dual-Layer SPE Cartridge
Pesticide residue testing of turmeric and other (dried) spices is challenging due to their complex compositions and high matrix. An efficient SPE clean-up can be achieved by a new Dual-layer cartridge.
LC/MS/MS Analysis of Neonicotinoid Pesticides in Dandelion Blossoms on Ascentis® Express C18 after Dispersive SPE (QuEChERS) using Supel™ QuE
LC/MS/MS Analysis of Neonicotinoid Pesticides in Dandelion Blossoms on Ascentis® Express C18 after Dispersive SPE (QuEChERS) using Supel™ QuE
US EPA Method 8141: GC Analysis of Organophosphorus Pesticides (OP-Pest) on Equity®-5, NPD Detection
analytical standard; Tokuthion, technical grade, pkg of 50 mg; Crotoxyphos; Phorate; Azinphos-ethyl; Diazinon; Azinphos-methyl; Demeton-O; Dimethoate; Chlorpyrifos-methyl
New Preparation Approach for Improved Pesticide Analysis of Challenging Samples
This webinar will introduce new sample preparation approaches leading to improved clean-up and recovery of pesticides in these challenging matrices.
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