Determination of ciprofloxacin and levofloxacin in human sputum collected from cystic fibrosis patients using microextraction by packed sorbent-high performance liquid chromatography photodiode array detector

Marcello Locatelli, Maria Teresa Ciavarella, Donatella Paolino, Christian Celia, Ersilia Fiscarelli, Gabriella Ricciotti, Arianna Pompilio, Giovanni Di Bonaventura, Rossella Grande, Gokhan Zengin, Luisa Di Marzio

Research output: Contribution to journalArticlepeer-review

Abstract

This paper reports a new, easy, cheap, and fast MEPS-HPLC-PDA method for the simultaneous analysis of ciprofloxacin and levofloxacin, two fluoroquinolones (FLQs) commonly used for the treatment of pulmonary infections in cystic fibrosis (CF) patients. The FLQs were resolved on a Discovery C8 column (250mm×4.6mm; 5μm particle size) using an isocratic elution with a run time of 15min, without further purification. The method was validated over concentrations ranging from 0.05 to 2μg/mL for both analytes in human sputum, and enrofloxacin was used as internal standard.This method was successfully tested to detect FLQs in sputum collected from CF patients. The MEPS-HPLC-PDA method was validated using biological samples collected from CF patients orally or intravenously injected with FLQs. The resultant data showed that the method is selective, sensitive and robust over range of concentrations for both FLQs. The limit of quantification of the method was 0.05. μg/mL for both analytes (comparable to more complex and expensive instrument configurations), weighted-matrix-matched standard curves showed a good linearity up to 2. μg/mL, and parallelism tests were also successfully assessed. The intra- and inter-day precision (RSD%) values were ≤10.4% and ≤11.1%, respectively, for all range of analysis. The intra- and inter-day trueness (Bias%) values are ranged from -11.8% to 7.25% for both antibiotic drugs.At the best of our knowledge, this is the first MEPS-HPLC-PDA based method that uses MEPS procedure for simultaneous determination of ciprofloxacin and levofloxacin in human sputum. The method was tested successfully on real sputum samples by following a conventional drug administration. Furthermore, the MEPS-HPLC-PDA based method provides more advantages to detect and analyze quickly the antibiotic drugs in biological matrices than other analytical procedures reported in literature.

Original languageEnglish
Pages (from-to)58-66
Number of pages9
JournalJournal of Chromatography A
Volume1419
DOIs
Publication statusPublished - Jun 15 2015

Keywords

  • Cystic fibrosis
  • Levofloxacin and ciprofloxacin
  • MEPS-HPLC-PDA
  • Method development
  • Sample preparation
  • Sputum

ASJC Scopus subject areas

  • Analytical Chemistry
  • Organic Chemistry
  • Biochemistry
  • Medicine(all)

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