Methodological approach to determine carlina oxide - a main volatile constituent of Carlina acaulis L. essential oil.
Talanta
; 191: 504-508, 2019 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-30262091
ABSTRACT
In this work, a fast and low-cost voltammetric methodology for determination of carlina oxide in plant extracts was developed. The best results were obtained using a boron-doped diamond electrode (BDDE). The voltammetric measurements of carlina oxide were performed in a 0.1â¯mol/L solution of sulphuric acid. After 30â¯s of stirring the solution, differential pulse voltammograms (DPVs) were recorded from 0.5 to 1.8â¯V. The amplitude was 75â¯mV and the scan rate was 175â¯mV/s. Measurements were recorded in non-deaerated solutions. The background current was subtracted from each registered voltammogram; then they were cut from 0.5 to 1.5â¯V. The detection and quantification limits were 0.28 and 0.93⯵g/L, respectively, and repeatability expressed as the relative standard deviation of 0.1â¯mg/L of carlina oxide was 1.9% (nâ¯=â¯5). The results were compared with those obtained using gas chromatography with a flame ionization detector and high performance liquid chromatography with a photodiode array detector.
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MEDLINE
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En
Ano de publicação:
2019
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Article