@article{fdi:010089564,
  title = {{V}oltammetric techniques for low-cost on-site routine analysis of thymol in the medicinal plant {O}cimum gratissimum},
  author = {{L}agnika, {L}. and {A}vosse, {S}. {I}. and {B}ouraima, {F}. {O}. and {S}indedji, {C}. {B}. and {D}akle, {M}. and {G}ueret, {R}. and {F}ort, {L}. and {G}imbert, {Y}. and {N}apporn, {T}. {W}. and {Z}igah, {D}. and {A}ubouy, {A}gn{\`e}s and {M}aisonhaute, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he composition of essential oils varies according to culture conditions and climate, which induces a need for simple and inexpensive characterization methods close to the place of extraction. {T}his appears particularly important for developing countries. {H}erein, we develop an analytical strategy to determine the thymol content in {O}cimum {G}ratissimum, a medicinal plant from {B}enin. {T}he protocol is based on electrochemical techniques (cyclic and square wave voltammetry) implemented with a low cost potentiostat. {T}hymol is a phenol derivative and was directly oxidized at the electrode surface. {W}e had to resort to submillimolar concentrations (25-300 mu {M}) in order to minimize production of phenol oligomers that passivate the electrode. {W}e worked first on two essential oils and realized that in one of them the thymol concentration was below our detection method. {T}hese results were confirmed by gas chromatography - mass spectrometry. {F}urthermore, we optimized the detection protocol to analyze an infusion made directly from the leaves of the plant. {F}inally, we studied whether the cost of the electrochemical cell may also be minimized by using pencil lead as working and counter electrodes.},
  keywords = {{E}lectrochemistry ; {E}ssential oils ; {O}cimum gratissimum ; {T}hymol ; {C}hemical composition variation},
  booktitle = {},
  journal = {{T}alanta},
  volume = {269},
  numero = {},
  pages = {125411 [6 p.]},
  ISSN = {0039-9140},
  year = {2024},
  DOI = {10.1016/j.talanta.2023.125411},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089564},
}