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Electrophoresis

Title:		Characterization of pharmaceutical drugs by a modified nonaqueous capillary electrophoresis--mass spectrometry method
Author(s):		Peri-Okonny UL; Kenndler E; Stubbs RJ; Guzman NA;
Address:		"Bioanalytical Drug Metabolism, Johnson and Johnson Pharmaceutical Research and Development, Raritan, NJ 08869, USA"
Journal Title:		Electrophoresis
Year:		2003
Volume:		24
Issue:		1-Feb
Page Number:		139 - 150
DOI:		10.1002/elps.200390006
ISSN/ISBN:		0173-0835 (Print) 0173-0835 (Linking)
Abstract:		"A simple method for the separation and characterization of a group of nine basic compounds, comprising seven tricyclic antidepressant and two bronchodilator drugs, by nonaqueous capillary electrophoresis (NACE) employing ultraviolet and mass spectrometry detection is described. After optimization of the electrophoresis separation conditions, including the compositions of the electrolyte and the organic solvent, a reliable separation of all nine basic analytes was achieved in 80 mM ammonium formate dissolved in a methanol-acetonitrite (80:20 v/v) mixture, having an apparent pH of 8.7. The volatile nonaqueous electrolyte system used with a normal electroosmotic flow polarity also provided an optimal separation condition for the characterization of the analytes by mass spectrometry. When results were compared with reversed-phase gradient and isocratic high-performance liquid chromatography (HPLC) methods, the NACE method provided greater efficiency, achieving baseline resolution for all nine basic compounds in less than 30 min. The NACE method is suitable for use as a routine procedure for the rapid separation and characterization of basic compounds and is a viable alternative to HPLC for the separation of a wide range of pharmaceutical drugs"
Keywords:		"Antidepressive Agents, Tricyclic/chemistry/isolation & purification Bronchodilator Agents/chemistry/isolation & purification Chromatography, High Pressure Liquid Electrophoresis, Capillary/instrumentation/*methods Hydrogen-Ion Concentration Mass Spectrome;"
Notes:		"MedlinePeri-Okonny, Unita L Kenndler, Ernst Stubbs, R John Guzman, Norberto A eng Germany 2003/03/26 Electrophoresis. 2003 Jan; 24(1-2):139-50. doi: 10.1002/elps.200390006"