alexa Assay of coenzyme Q(10) in plasma by a single dilution step.
Chemical Engineering

Chemical Engineering

Journal of Analytical & Bioanalytical Techniques

Author(s): Mosca F, Fattorini D, Bompadre S, Littarru GP

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Abstract A new method is described for determining coenzyme Q(10) (CoQ(10)) in plasma. The method is based on oxidation of CoQ(10) in the sample by treating it with para-benzoquinone followed by extraction with 1-propanol and direct injection into the HPLC apparatus. This method achieves a linear detector response for peak area measurements over the concentration range of 0.05-3.47 microM. Diode array analysis of the peak was consistent with CoQ(10) spectrum. Supplementation of the samples with known amounts of CoQ(10) yielded a quantitative recovery of 96-98.5\%; the method showed a level of quantitation of 1.23 nmol per HPLC injection (200 microl of propanol extract containing 33.3 microl of plasma). A correlation of r = 0.99 (P < 0.0001) was found with a reference electrochemical detection method. Within run precision showed a CV\% of 1.6 for samples approaching normal values (1.02 microM). Day-to-day precision was also close to 2\%. (c) 2002 Elsevier Science (USA). This article was published in Anal Biochem and referenced in Journal of Analytical & Bioanalytical Techniques

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