Chiral separation of beta-blockers by high-performance liquid chromatography and determination of bisoprolol enantiomers in surface waters

  • Marijana Pocrnić Prirodoslovno matematički fakultet
  • Martin Ansorge
  • Magda Dovhunova
  • Iva Habinovec
  • Eva Tesarova
  • Nives Galić
Keywords: acebutolol, atenolol, Chirobiotic V column, Croatia, Czech Republic, enantioseparation, HPLC, labetalol, metoprolol, water analysis

Abstract

Beta-blockers are chiral compounds with enantiomers that have different bioactivity, which means that while one is active, the other can be inactive or even harmful. Due to their high consumption and incomplete degradation in waste water, they may reach surface waters and affect aquatic organisms. To address this issue we developed a chromatographic method suitable for determining beta-blocker enantiomers in surface waters. It was tested on five beta-blockers (acebutolol, atenolol, bisoprolol, labetalol and metoprolol) and validated on bisoprolol enantiomers. Good enantioseparation of all analysed beta-blockers was achieved on the Chirobiotic V column with the mobile phase composed of methanol/acetic acid/triethylamine (100/0.20/0.15 v/v/v) at a flow rate of 0.5 mL/min and column temperature of 45 °C. Method proved to be linear in the concentration range from 0.075 µg/mL to 5 µg/mL, and showed good recovery. The limits of bisoprolol enantiomer detection were 0.025 µg/mL and 0.026 µg/mL and of quantification 0.075 µg/mL and 0.075 µg/mL. Despite its limitations, it seems to be a promising method for bisoprolol enantiomer analysis in surface water samples. Further research could focus on waste water analysis, where enantiomer concentrations may be high. Furthermore, transferring the method to a more sensitive one such as liquid chromatography coupled with tandem mass spectrometry and using ammonium acetate as the mobile phase additive instead of acetic acid and triethylamine would perhaps yield much lower limits of detection and quantification.

Published
2020-02-21
How to Cite
1.
Pocrnić M, Ansorge M, Dovhunova M, Habinovec I, Tesarova E, Galić N. Chiral separation of beta-blockers by high-performance liquid chromatography and determination of bisoprolol enantiomers in surface waters. Arh Hig Rada Toksikol [Internet]. 2020Feb.21 [cited 2020Jun.7];71(1). Available from: https://arhiv.imi.hr/index.php/arhiv/article/view/1165
Section
Original article