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A UHPLC-HRMS method for simultaneous quantification of flavonoid contents in the aerial parts of    Chenopodium   bonus-henricus    L. was developed and validated. The amount of 12 detected flavonoids was calculated relative to external standard hyperoside. The calibration curve of hyperoside showed very good linear regressions and the correlation coefficient was R 2  &gt; 0.9979. The limits of detection and quantitation limits were 0.39 ng/mL and 1.17 ng/mL, respectively. The UHPLC-HRMS method showed acceptable accuracy. At three different concentrations the recoveries of hyperoside ranging from 99.63% to 100.70% with RSD from 1.58% to 2.31%. The intra-day and inter-day precision were determined by analyzing the retention times and recovery of the external standard. The glycosides of spinacetin and patulenin ( 1 ) were the predominant compounds in the wild spinach which contents ranging from 1.79 to 4.41 mg g -1  D.W., calculated as hyperoside. The total amount of flavonoids was found to be 15.12 mg g -1  D.W.

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Validated UHPLC-HRMS method for simultaneous quantification of flavonoid contents in the aerial parts of    Chenopodium   bonus-henricus    L. (wild spinach)