Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 2 de 2
Add filters

Year range
Journal of Pharmaceutical Analysis ; (6): 739-745, 2021.
Article in Chinese | WPRIM | ID: wpr-931218


In this study,we developed a novel on-line solid phase extraction (SPE)-ultra-high-performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS)-based analytical method for simulta-neously quantifying 12 illicit drugs and metabolites (methamphetamine,amphetamine,morphine,co-deine,6-monoacetylmorphine,benzoylecgonine,3,4-methylenedioxymethamphetamine,3,4-methylenedioxyamphetamine,cocaine,ketamine,norketamine,and methcathinone) and cotinine(COT) in wastewater samples.The analysis was performed by loading 2 mL of the sample onto an Oasis hydrophilic-lipophilic balance cartridge and using a cleanup step (5% methanol) to eliminate interference with a total run time of 13 min.The isotope-labeled internal standard method was used to quantify the target substances and correct for unavoidable losses and matrix effects during the on-line SPE process.Typical analytical characteristics used for method validation were sensitivity,linearity,precision,repeatability,recovery,and matrix effects.The limit of detection (LOD) and limit of quantification (LOQ)of each target were set at 0.20 ng/L and 0.50 ng/L,respectively.The linearity was between 0.5 ng/L and 250 ng/L,except for that of COT.The intra-and inter-day precisions were <10.45% and 25.64%,respec-tively,and the relative recovery ranged from 83.74% to 162.26%.The method was used to analyze various wastewater samples from 33 cities in China,and the results were compared with the experimental re-suits of identical samples analyzed using off-line SPE.The difference rate was between 19.91%and-20.44%,and the error range could be considered acceptable.These findings showed that on-line SPE is a suitable alternative to off-line SPE for the analysis of illicit drugs in samples.

Journal of China Pharmaceutical University ; (6): 257-263, 2015.
Article in Chinese | WPRIM | ID: wpr-811943


@#Pharmaceutical impurities affect the quality of drugs, and their research is essential in drug development, production and sale. Recently, there have been tremendous advancements in instrumental techniques that allow rapid development of technologies and analytical methods in the research of pharmaceutical impurities. This review discusses the origins and analytical methods of pharmaceutical impurities including genotoxic impurities, and mainly describes the analytical techniques and strategies to assess the genotoxicity of impurities, providing technical references for the study of pharmaceutical impurities.