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Quantification of reduced and oxidized coenzyme Q10 in supplements and medicines by HPLC-UV.
Analytical Methods ( IF 2.7 ) Pub Date : 2020-04-20 , DOI: 10.1039/d0ay00683a Žane Temova Rakuša 1 , Albin Kristl 1 , Robert Roškar 1
Analytical Methods ( IF 2.7 ) Pub Date : 2020-04-20 , DOI: 10.1039/d0ay00683a Žane Temova Rakuša 1 , Albin Kristl 1 , Robert Roškar 1
Affiliation
Coenzyme Q10 (CoQ10) supplements are widely used because of their antioxidant and anti-inflammatory effects, especially in the management of cardiovascular diseases. The latest pharmaceutical approach to increase CoQ10 bioavailability and efficiency is the formulation of its reduced form. Regardless of the growing number and usage of CoQ10 preparations, their analytics and quality control is inadequate, neglecting interconversion between the two CoQ10 forms. Therefore, this study proposes a HPLC-UV method for the simultaneous quantification of both reduced and oxidized coenzyme Q10, as well as total CoQ10, as a sum of its individual forms. The suitability of the developed method was confirmed by two additional approaches for total CoQ10 determination – its total reduction and oxidation, differing from the proposed procedure only in the final stage of sample preparation. The results for total CoQ10 content were consistent between the three procedures and also with the official USP method for total CoQ10 determination. The proposed method was applied to 13 dietary supplements and medicines in the form of soft- and hard-shell capsules, revealing the co-existence of both CoQ10 forms in 85% of the tested preparations. CoQ10 forms that were undeclared accounted for up to 75% of the CoQ10 content, which is overlooked by current official methods that evaluate only the total CoQ10 content. This validated HPLC-UV method for the unequivocal quantification of reduced and oxidized CoQ10 is therefore appropriate for the routine analysis of CoQ10 preparations in quality control laboratories, as well as for stability studies, and is suggested to be adopted as an official method.
中文翻译:
通过HPLC-UV定量补充剂和药物中还原和氧化的辅酶Q10。
辅酶Q10(CoQ10)补充剂因其抗氧化和消炎作用而被广泛使用,尤其是在心血管疾病的治疗中。增加CoQ10生物利用度和效率的最新药物方法是降低其形式。无论CoQ10制剂的数量和使用量如何增长,它们的分析和质量控制均不充分,忽略了两种CoQ10形式之间的相互转化。因此,本研究提出了一种同时测定还原型和氧化型辅酶Q10以及总辅酶Q10的HPLC-UV方法,作为其单个形式的总和。另外两种测定总辅酶Q10的方法证实了所开发方法的适用性-总还原和氧化,仅在样品制备的最后阶段与建议的程序有所不同。三种方法之间的总辅酶Q10含量结果一致,也与官方USP方法测定总辅酶Q10含量一致。拟议的方法应用于软壳和硬壳胶囊形式的13种膳食补充剂和药物,揭示了85%的受试制剂中两种CoQ10形式的共存。未声明的CoQ10表单最多占CoQ10内容的75%,而当前仅评估总CoQ10内容的官方方法忽略了该形式。因此,这种经过验证的HPLC-UV方法可对还原和氧化的CoQ10进行明确定量,因此适用于质量控制实验室中CoQ10制剂的常规分析以及稳定性研究,
更新日期:2020-04-20
中文翻译:
通过HPLC-UV定量补充剂和药物中还原和氧化的辅酶Q10。
辅酶Q10(CoQ10)补充剂因其抗氧化和消炎作用而被广泛使用,尤其是在心血管疾病的治疗中。增加CoQ10生物利用度和效率的最新药物方法是降低其形式。无论CoQ10制剂的数量和使用量如何增长,它们的分析和质量控制均不充分,忽略了两种CoQ10形式之间的相互转化。因此,本研究提出了一种同时测定还原型和氧化型辅酶Q10以及总辅酶Q10的HPLC-UV方法,作为其单个形式的总和。另外两种测定总辅酶Q10的方法证实了所开发方法的适用性-总还原和氧化,仅在样品制备的最后阶段与建议的程序有所不同。三种方法之间的总辅酶Q10含量结果一致,也与官方USP方法测定总辅酶Q10含量一致。拟议的方法应用于软壳和硬壳胶囊形式的13种膳食补充剂和药物,揭示了85%的受试制剂中两种CoQ10形式的共存。未声明的CoQ10表单最多占CoQ10内容的75%,而当前仅评估总CoQ10内容的官方方法忽略了该形式。因此,这种经过验证的HPLC-UV方法可对还原和氧化的CoQ10进行明确定量,因此适用于质量控制实验室中CoQ10制剂的常规分析以及稳定性研究,