{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T22:01:10Z","timestamp":1768860070565,"version":"3.49.0"},"reference-count":36,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T00:00:00Z","timestamp":1677801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001824","name":"Czech Science Foundation","doi-asserted-by":"publisher","award":["23-05688S"],"award-info":[{"award-number":["23-05688S"]}],"id":[{"id":"10.13039\/501100001824","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Specific University Research at Charles University, Czech Republic","award":["23-05688S"],"award-info":[{"award-number":["23-05688S"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A novel electrochemical approach using two different electrode materials, platinum and boron-doped diamond (BDD), was employed to study the oxidative stability of the drug abacavir. Abacavir samples were subjected to oxidation and subsequently analysed using chromatography with mass detection. The type and amount of degradation products were evaluated, and results were compared with traditional chemical oxidation using 3% hydrogen peroxide. The effect of pH on the rate of degradation and the formation of degradation products were also investigated. In general, both approaches led to the same two degradation products, identified using mass spectrometry, and characterised by 319.20 and m\/z 247.19. Similar results were obtained on a large-surface platinum electrode at a potential of +1.15 V and a BDD disc electrode at +4.0 V. Degradation of 20% of abacavir, the rate required for pharmaceutical stability studies, took only a few minutes compared to hours required for oxidation with hydrogen peroxide. Measurements further showed that electrochemical oxidation in ammonium acetate on both types of electrodes is strongly pHdependent. The fastest oxidation was achieved at pH 9. The pH also affects the composition of the products, which are formed in different proportions depending on the pH of the electrolyte.<\/jats:p>","DOI":"10.3390\/s23052776","type":"journal-article","created":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T03:32:52Z","timestamp":1677814372000},"page":"2776","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Comparison of Chemical and Electrochemical Approaches to Abacavir Oxidative Stability Testing"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-0920-6927","authenticated-orcid":false,"given":"Lucie","family":"Pra\u017e\u00e1kov\u00e1","sequence":"first","affiliation":[{"name":"Charles University, Faculty of Science, Department of Analytical Chemistry, Albertov 6, 12800 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1005-7700","authenticated-orcid":false,"given":"Jan","family":"Fischer","sequence":"additional","affiliation":[{"name":"Charles University, Faculty of Science, Department of Analytical Chemistry, Albertov 6, 12800 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6656-9748","authenticated-orcid":false,"given":"Andrew","family":"Taylor","sequence":"additional","affiliation":[{"name":"FZU\u2014Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999\/2, 18221 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2808-9524","authenticated-orcid":false,"given":"Anna","family":"Kub\u00ed\u010dkov\u00e1","sequence":"additional","affiliation":[{"name":"Charles University, Faculty of Science, Department of Analytical Chemistry, Albertov 6, 12800 Prague, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,3]]},"reference":[{"key":"ref_1","first-page":"54","article-title":"Current trends in forced degradation study for pharmaceutical product development","volume":"3","author":"Singh","year":"2012","journal-title":"J. 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