Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Journal of the Brazilian Chemical Society

Juciene A. Caris¹  Andréa R. Chaves¹  Maria Eugênia C. Queiroz¹ 

[1] ,Universidade de São Paulo Faculdade de Filosofia Ciências e Letras de Ribeirão Preto Departamento de QuímicaRibeirão Preto SP ,Brazil

关键词: solid-phase microextraction;    polythiophene;    antidepressants;    liquid chromatography;   

DOI  :  10.1590/S0103-50532012000100009

来源: SciELO

【 摘 要 】

Polythiophene (PTh) phase electropolymerized on the stainless steel wire was evaluated as solid-phase microextraction (SPME), and analysis by liquid chromatography with spectrophotometric detection (LC-UV) for determination of new-generation antidepressants, selective serotonin reuptake inhibitors (SSRIs) (citalopram, paroxetine, fluoxetine and sertraline), in plasma samples. The influence of electropolymerization variables (scan rate, potential range and scan cycles) was evaluated on SPME performance. The SPME variables (extraction time, temperature, matrix pH, ionic strength and desorption procedure), as well as the influence of plasma proteins on sorption mechanisms were also evaluated. The SPME/LC-UV method developed for determination of antidepressants in plasma sample presented a linear range between the limit of quantification (LOQ, 200-250 ng mL-1) to 4000 ng mL-1, and interday precision with coefficient of variation (CV) ranged from 11 to 15%. The proposed method can be a useful tool for the determination of antidepressants in human plasma samples in urgent toxicological analysis after the accidental or suicidal intake of higher doses of medications.

【 授权许可】

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