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Okamoto, T. et al.

High-performance liquid chromatography of coenzyme Q-related compounds and its application to biological materials.

A convenient and precise method for the separation and determination of coenzyme Q (CoQ)-related compounds (CoQ homologues, plastoquinone-9, ubichromenol-9, etc.) was developed using high-performance liquid chromatography (HPLC). All compounds tested were separated using a reverse-phase column with a suitable mobile phase and detected at a wavelength of 275 nm. CoQ extracts in plasma and erythrocytes were purified by thin-layer chromatography prior to HPLC analysis, but such purification was not necessary when determining CoQ in urine and tissues. Hydroquinone forms of CoQ existing in animal tissues were oxidized to the corresponding quinone forms with potassium hexacyanoferrate(III). This HPLC method was applied satisfactorily to the determination of the contents of CoQ homologues in human and animal samples. CoQ10 was the only homologue detected in human samples, and CoQ8, CoQ9 and CoQ10 were native homologues of CoQ in rat tissues. Ubichromenol-9 and plastoquinone-9 were not detected in these samples.[1]

References

High-performance liquid chromatography of coenzyme Q-related compounds and its application to biological materials. Okamoto, T., Fukui, K., Nakamoto, M., Kishi, T., Okishio, T., Yamagami, T., Kanamori, N., Kishi, H., Hiraoka, E. J. Chromatogr. (1985) [Pubmed]

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