کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
187393 | 459642 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Abrasive stripping voltammetry of myricetin and dihydromyricetin Abrasive stripping voltammetry of myricetin and dihydromyricetin](/preview/png/187393.png)
• The application of abrasive stripping voltammetry in the measurement of oxidation potentials of powders of myricetin and dihydromyricetin are reported.
• Electrode reaction of pyrogallol moiety in both compounds is reversible, two-electrons, two-protons process with unstable intermediate.
• The E7 value of myricetin suggests that this flavonoid is one of the best antioxidants.
Microparticles of flavonoids myricetin and dihydromyricetin are measured by cyclic and square-wave voltammetry. The first electrode reaction of both compounds is reversible, two-electrons, two-protons oxidation of pyrogallol group with E7 = 0.300 V vs. NHE. This makes them as potent antioxidants as quercetin. The second and the third electrode reactions are irreversible, one-electron, one-proton oxidations of hydroxyl groups. The results demonstrate that the applied technique is useful for the measurement of solid state reactivity of antioxidants.
Journal: Electrochimica Acta - Volume 98, 30 May 2013, Pages 153–156