Fast separation of selective serotonin reuptake inhibitors antidepressants in plasma sample by nonaqueous capillary electrophoresis.
A simple, fast, and sensitive liquid-liquid extraction method followed by nonaqueous capillary electrophoresis (LLE/NACE) was developed and validated for simultaneous determination of four antidepressants (fluoxetine, sertraline, citalopram and paroxetine) in human plasma. Several experimental separation conditions using aqueous and nonaqueous media separation were tested by varying the electrolyte pH value (for aqueous medium) and the ionic strength concentration considering the similar mobility of the compounds. High-resolution separation was achieved with a mixture of 1.25 mol L(-1) of phosphoric acid in acetonitrile. The quantification limits of the LLE/CE method varied between 15 and 30 ng mL(-1), with a relative standard deviation (RSD) lower than 10.3%. The method was successfully applied in therapeutic drug monitoring and should be employed in the evaluation of plasma levels in urgent toxicological analysis.
Catai
Ana Paula Formenton
AP
Departamento de Química, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, SP, Brazil.
Carrilho
Emanuel
E
Lanças
Fernando Mauro
FM
Queiroz
Maria Eugênia Costa
ME
D000928:Antidepressive Agents / Q000097:blood / Q000302:isolation & purification*; D015283:Citalopram / Q000097:blood / Q000302:isolation & purification; D016903:Drug Monitoring / Q000379:methods*; D019075:Electrophoresis, Capillary / Q000379:methods*; D005473:Fluoxetine / Q000097:blood / Q000302:isolation & purification; D006801:Humans; D017374:Paroxetine / Q000097:blood / Q000302:isolation & purification; D017367:Selective Serotonin Reuptake Inhibitors / Q000097:blood / Q000302:isolation & purification*; D020280:Sertraline / Q000097:blood / Q000302:isolation & purification
D000928:Antidepressive Agents; D015283:Citalopram; D005473:Fluoxetine; D017374:Paroxetine; D017367:Selective Serotonin Reuptake Inhibitors; D020280:Sertraline