Rasheed Ashraf Saad (8 results)

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Taschenbuch. Condition: Neu. Influence of capacity on four different sulfobetaine stationary phases | Zwitterionic Hydrophilic Interaction Liquid Chromatography | Ashraf Saad Rasheed (u. a.) | Taschenbuch | 180 S. | Englisch | 2015 | Scholars' Press | EAN 9783639516012 | Verantwortliche Person für die EU: BoD - Books on Demand, In de Tarpen 42, 22848 Norderstedt, info[at]bod[dot]de | Anbieter: preigu.…

Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -A number of covalently bonded zwitterionic stationary phases with inner quaternary amines and outer sulfonic acids in varying capacities was synthesized based on poly (styrene-DVB) particles by graft polymerization. The different spacer lengths and capacities are used as an investigative tool, for the retention behavior of the inorganic anions in ZIC and ZIC-HILIC modes. The results of variations of acetonitrile content, buffer concentration and mobile phase pH show that pharmaceuticals can be separated based on hydrophilic, hydrophobic and anion/cation-exchange interactions between the stationary phase and analyte. The pharmaceutical deferoxamine mesylate (DFOM) is a chelating agent which forms complexes with multiple charged metal ions of biological importance (Fe3+, Al3+) and other metals. We could demonstrate that the sulfobetaine exchangers are able to separate the Fe(III)-DFOM and Al(III)-DFOM complexes by IC-ICP-AES. Excess adsorption isotherms of water from acetonitrile were measured for ten zwitterionic stationary phases (eight sulfobetaine exchangers have been prepared and two commercially available stationary phases) using the minor disturbance method. 180 pp. Englisch.…

Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Rasheed Ashraf SaadDr. Ashraf Saad Rasheed-Analytical Chemistry, Department of chemistry, College of Science, University of Baghdad, Baghdad, Iraq- M.Sc. Analytical Chemistry, December 2003, Department of chemistry, College of Scienc.…

Condition: New. Print on Demand.

Condition: New. PRINT ON DEMAND.

Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Titel. Neuware -A number of covalently bonded zwitterionic stationary phases with inner quaternary amines and outer sulfonic acids in varying capacities was synthesized based on poly (styrene-DVB) particles by graft polymerization. The different spacer lengths and capacities are used as an investigative tool, for the retention behavior of the inorganic anions in ZIC and ZIC-HILIC modes. The results of variations of acetonitrile content, buffer concentration and mobile phase pH show that pharmaceuticals can be separated based on hydrophilic, hydrophobic and anion/cation-exchange interactions between the stationary phase and analyte. The pharmaceutical deferoxamine mesylate (DFOM) is a chelating agent which forms complexes with multiple charged metal ions of biological importance (Fe3+, Al3+) and other metals. We could demonstrate that the sulfobetaine exchangers are able to separate the Fe(III)-DFOM and Al(III)-DFOM complexes by IC-ICP-AES. Excess adsorption isotherms of water from acetonitrile were measured for ten zwitterionic stationary phases (eight sulfobetaine exchangers have been prepared and two commercially available stationary phases) using the minor disturbance method.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 180 pp. Englisch.…

Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - A number of covalently bonded zwitterionic stationary phases with inner quaternary amines and outer sulfonic acids in varying capacities was synthesized based on poly (styrene-DVB) particles by graft polymerization. The different spacer lengths and capacities are used as an investigative tool, for the retention behavior of the inorganic anions in ZIC and ZIC-HILIC modes. The results of variations of acetonitrile content, buffer concentration and mobile phase pH show that pharmaceuticals can be separated based on hydrophilic, hydrophobic and anion/cation-exchange interactions between the stationary phase and analyte. The pharmaceutical deferoxamine mesylate (DFOM) is a chelating agent which forms complexes with multiple charged metal ions of biological importance (Fe3+, Al3+) and other metals. We could demonstrate that the sulfobetaine exchangers are able to separate the Fe(III)-DFOM and Al(III)-DFOM complexes by IC-ICP-AES. Excess adsorption isotherms of water from acetonitrile were measured for ten zwitterionic stationary phases (eight sulfobetaine exchangers have been prepared and two commercially available stationary phases) using the minor disturbance method.…