Evaluation of food quality by the complexity of composed metabolites.

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A large number of compounds are contained in each food, however, most of them have not been identified yet. In this research, I developed a procedure of comprehensive chemical annotation for unknown food compounds using high accuracy LC-MS analysis and applied it to comprehensive compound analysis of vegetables. This non-targeted compound analysis detected 800 compounds at maximum from each vegetable. Moreover, the composition especially in flavonoid was different in the edible part of each vegetable.