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Résultats de la recherche - 31 results

All in one method for the analysis of multiclass food additives using UHPLC-MS/MS

in Europe. A QuEChERS based extraction has been devised using acidified acetonitrile as extraction solvent, followed by a C18 and PSA dispersive solid phase extraction step. For the development of the ...

Residual solvents in pharmaceutical substances and products

Publication Type: Scientific book or chapter Authors: Eric Deconinck; Bart Desmedt Source: Residual solvents in pharmaceutical substances and products, Elsevier, Volume 2, Issue 1201, Toronto, ...

Impurity profiling of the most frequently encountered falsified polypeptide drugs on the Belgian market

API-related impurities, small molecule contaminants (defined as organic small molecules not belonging to the other categories), elemental impurities and residual solvents. This comprehensive study showed that ...

Antimutagenicity, antioxidant activity and cytotoxicity of n-tetracosanol, eiocosanoic acid and arjunolic acid isolated from Combretum microphyllum (Combretaceae)

using Salmonella typhimurium TA98. TA100 and TA102.Solvent-solvent fractionation was used to partition the extracts and following theprinciple of bioassay-guided fractionation, three compounds were ...

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

regression Regression model result results S SAFETY Sample Samples seafood SENSITIVITY separation Service silica Solutions Solvents STANDARD standards structure suppression System Target Temperature time ...

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

solvent volumes, and involves a two-step clean-up, including Florisil and acid silica. The determination of BFR s was performed using gas chromatography-mass spectrometry operated in electron-capture ...

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 ...

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