Quality control evaluation of nutraceutical products from Ginkgo biloba using liquid chromatography coupled to high resolution mass spectrometry

Journal of Pharmaceutical and Biomedical Analysis
Noelia López-GutiérrezAntonia Garrido Frenich

Abstract

Analysis of 11 commercial nutraceutical products obtained from ginkgo has been performed using ultra-high performance liquid chromatography coupled to single-stage Orbitrap high resolution mass spectrometry (UHPLC-Orbitrap-MS). The main phytochemicals present in these samples were detected and quantified, utilizing a database containing 65 compounds. Phytochemicals were extracted using a mixture of an aqueous solution of methanol:water (80:20, v/v) in two sequential solid-liquid extractions. Adequate validation parameters were obtained. The validated compounds exhibited suitable linearity with determination coefficients (R(2)) higher than 0.99, and intra and inter-day precision were lower than 17 and 22%, respectively. Limits of detection (LODs) and quantification (LOQs) were calculated, ranging from 2 to 10 μg L(-1), except for myricetin (LOD, 150 μg L(-1) and LOQ, 300 μg L(-1)). Results indicate that the amount of terpenoids greatly varies among samples, ranging from 1133 (C7) to 12706 mg kg(-1) (C11). This emphasizes the importance of improve quality control in ginkgo-based products. Moreover, retrospective analysis allowed the detection of some undesirable substances as ginkgolic acid in the samples evaluated.

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