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Monatshefte für Chemie - Chemical Monthly

, Volume 149, Issue 9, pp 1701–1708 | Cite as

Voltammetric determination of leucovorin in pharmaceutical preparations using a boron-doped diamond electrode

  • Renáta Šelešovská
  • Barbora Kränková
  • Michaela Štěpánková
  • Pavlína Martinková
  • Lenka Janíková
  • Jaromíra Chýlková
  • Tomáš Navrátil
Original Paper

Abstract

Method for voltammetric determination of leucovorin, a drug frequently applied to decrease some unfavorable effects of anticancer drugs such as methotrexate or to increase the therapeutic effect of 5-fluorouracil, has been developed employing a bare boron-doped diamond electrode. It is the first method for leucovorin determination based on its electrochemical oxidation. Although at least three anodic and three cathodic voltammetric peaks could be recorded under the used conditions, only the anodic response situated at about + 900 mV (vs. saturated Ag|AgCl electrode) was suitable, namely due to its shape and position, for analytical purposes. Using differential pulse voltammetry with optimized parameters and supporting electrolyte of pH 3.0, the linear dynamic range of leucovorin determination was recorded from 0.15 to 25 μmol dm−3. Under such conditions, low limit of quantification of 0.050 μmol dm−3 and limit of detection of 0.015 μmol dm−3 as well was reached. Relative standard deviation calculated from 11 repeated measurements amounted to 0.7% and calculated from five repeated determinations amounting less than 3.0%. Applicability of the developed method was verified by repeated analysis of the pharmaceutical preparation with excellent results (recovery 98.7–102.8%, relative standard deviation 1.81%).

Graphical abstract

Keywords

Boron-doped diamond electrode Determination Leucovorin Pharmaceutical samples Voltammetry 

Notes

Acknowledgements

This work was supported by the grant project of the Czech Science Foundation (project no. 17-03868S) and by The University of Pardubice (projects nos. SGSFChT_2018_003 and SD373001/82/30350(2016)).

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Environmental and Chemical EngineeringUniversity of PardubicePardubiceCzech Republic
  2. 2.J. Heyrovsky Institute of Physical Chemistry of the Academy of Sciences of the Czech RepublicPrague 8Czech Republic

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