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Résultats de la recherche - 40 results
Isolation and characterization of the compounds responsible for the antimutagenic activity of Combretum microphyllum (Combretaceae) leaf extracts
Solvent-solvent fractionation was used to partition the extracts and by using bioassay-guided fractionation, three compounds were isolated. The antimutagenic activity of the three compounds were determined in the ...
LC-MS-based analytical method for quantification of selected brominated flame retardants in food commodities
public Quantification recommendation regression Regression model result results S SAFETY Sample Samples seafood SENSITIVITY separation Service silica Solutions Solvents STANDARD standards structure ...
Study of the possible migration risks of food contact materials for children under 3 years
and DCM-n-hexane (1:1) were the most efficient extraction solvents. Consequently, there was opted for the nonchlorinated solvents and EtOAc-n-hexane (1:1) was selected for the application to real ...
Occurrence of polybrominated diphenyl ethers and emerging halogenated flame retardants in food items
validated in the frame of the this Project. This novel method uses low sample amounts and solvent volumes, and involves a two-step clean-up, including Florisil and acid silica. The determination of BFR s was ...
Synthesis and anti-tubercular activity of N(2)-arylbenzo[g]isoquinoline-5,10-dione-3-iminium bromides.
increased the solubility of the quinones in polar solvents. To this purpose N(2)-arylbenzo[g]isoquinoline-5,10-dione-3-iminium bromides were synthesized in a straightforward way by means of a reaction of ...
Identification of (antioxidative) plants in herbal pharmaceutical preparations and dietary supplements.
Antioxidants Dietary Supplements Hydrogen-Ion Concentration Mass Spectrometry Methanol Passiflora Pharmaceutical Preparations Plant Preparations Reproducibility of Results Solvents Abstract: The standard ...
A simple multi-residue method for the determination of pesticides in fruits and vegetables using a methanolic extraction and ultra-high-performance liquid chromatography-tandem mass spectrometry: optimization and extension of scope.
methanol as extraction solvent. Our goal for this study was to optimize the analytical scheme while extending the compound scope from 19 to 200 pesticides. The main changes from the original method take ...
Residual solvents in pharmaceutical substances and products
Publication Type: Scientific book or chapter Authors: Eric Deconinck; J.L. de Beer; Wypych,G. Source: Handbook of Solvents-2nd edition, Chemtec Publishing, Volume 2 Use, health and environment, ...
Development and application of a non-targeted extraction method for the analysis of migrating compounds from plastic baby bottles by GC-MS.
Solubility Solvents Abstract: In 2011, the European Union prohibited the production of polycarbonate (PC) baby bottles due to the toxic effects of the PC monomer bisphenol-A. Therefore, baby bottles made of ...
Residual Solvents: A potential threat present in counterfeit medicines
analysis DRUG present Solvents Health Topics: Effectiveness and safety of vaccines, medicines and health products- Quality of medical laboratories Efficacité et sécurité des vaccins, médicaments et produits ...