The Experts below are selected from a list of 114321 Experts worldwide ranked by ideXlab platform
Mu Naushad - One of the best experts on this subject based on the ideXlab platform.
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method for the fast determination of bromate nitrate and nitrite by ultra performance liquid chromatography mass spectrometry and their monitoring in saudi arabian drinking water with chemometric data treatment
Talanta, 2016Co-Authors: Mohammad Rizwan Khan, Zeid A Alothman, Saikh Mohammad Wabaidur, Rosa Busquets, Mu NaushadAbstract:Abstract A rapid, sensitive and precise method for the determination of bromate (BrO3−), nitrate (NO3−) and nitrite (NO2−) in drinking water was developed with Ultra performance Liquid Chromatography–Mass Spectrometry (UPLC–ESI/MS). The elution of BrO3−, NO3− and NO2− was attained in less than two minutes in a reverse Phase Column. Quality parameters of the method were established; run-to-run and day-to-day precisions were
Jama Elmi - One of the best experts on this subject based on the ideXlab platform.
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reversed Phase high performance liquid chromatography determination of ginsenosides of panax quinquefolium
Journal of Chromatography A, 1996Co-Authors: William A Court, John G Hendel, Jama ElmiAbstract:Abstract A reversed-Phase high-performance liquid chromatographic determination of ginsenosides Rb1, Rb2, Rc, Rd, Re, Rg1, Ro, gypenoside XVII, pseudoginsenoside-F11, and an indirect determination of the malonyl-ginsenosides Rb1, Rb2, Rc and Rd in Panax quinquefolium was developed. Ground ginseng samples were extracted with aqueous methanol in an ultrasonic bath. The neutral triterpene saponins were determined directly by liquid chromatography on the extract. The acidic ginsenosides were determined indirectly following the hydrolysis with aqueous potassium hydroxide. Separations were achieved with a phosphate buffer-acetonitrile gradient system using a C18 reversed-Phase Column.
Nageswara R Rao - One of the best experts on this subject based on the ideXlab platform.
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determination of cis and trans isomers of monocrotophos in technical products by reversed Phase Column liquid chromatography
Journal of Chromatography A, 2000Co-Authors: Nusrath Ismail, M Vairamani, Nageswara R RaoAbstract:A simple reversed-Phase Column liquid chromatographic method for the determination of cis and trans isomers of monocrotophos (MCP) using a C18 Column, aqueous acetonitrile as eluent and UV detection at 218 nm was developed. The method was used for quality assurance and to study the relative stabilities of cis and trans isomers in technical products of MCP.
Mohammad Rizwan Khan - One of the best experts on this subject based on the ideXlab platform.
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method for the fast determination of bromate nitrate and nitrite by ultra performance liquid chromatography mass spectrometry and their monitoring in saudi arabian drinking water with chemometric data treatment
Talanta, 2016Co-Authors: Mohammad Rizwan Khan, Zeid A Alothman, Saikh Mohammad Wabaidur, Rosa Busquets, Mu NaushadAbstract:Abstract A rapid, sensitive and precise method for the determination of bromate (BrO3−), nitrate (NO3−) and nitrite (NO2−) in drinking water was developed with Ultra performance Liquid Chromatography–Mass Spectrometry (UPLC–ESI/MS). The elution of BrO3−, NO3− and NO2− was attained in less than two minutes in a reverse Phase Column. Quality parameters of the method were established; run-to-run and day-to-day precisions were
Jun Chen - One of the best experts on this subject based on the ideXlab platform.
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Affinity selection-based two-dimensional chromatography coupled with high-performance liquid chromatography-mass spectrometry for discovering xanthine oxidase inhibitors from Radix Salviae Miltiorrhizae.
Analytical and bioanalytical chemistry, 2014Co-Authors: Wen Gao, Jia-ying Hong, Jun ChenAbstract:Xanthine oxidase (XOD) is a key oxidative enzyme to the pathogenesis of hyperuricemia and certain diseases induced by excessive reactive oxygen species. XOD inhibitors could provide an important therapeutic approach to treat such diseases. A new method using affinity selection-based two-dimensional chromatography coupled with liquid chromatography-mass spectrometry was developed for the online screening of potential XOD inhibitors from Radix Salviae Miltiorrhizae. Based on our previous study, the two-dimensional, turbulent-flow chromatography (TFC) was changed to a mixed-mode anion-exchange/reversed-Phase Column and one reversed-Phase Column. The developed method was validated to be selective and sensitive for screening XOD-binding compounds, especially weak acidic ones, in the extracts. Three salvianolic acids were screened from the Radix Salviae Miltiorrhizae extract via the developed method. The XOD inhibitory activities of salvianolic acid C and salvianolic acid A were confirmed, and their inhibitory modes were measured. Salvianolic acid C exhibited potent XOD inhibitory activity with an IC50 of 9.07 μM. This work demonstrated that the developed online, two-dimensional TFC/LC-MS method was effective in discovering the binding affinity of new compounds from natural extracts for target proteins, even at low concentrations.