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. 2021 Jan 8;2021:4678087. doi: 10.1155/2021/4678087

Figure 1.

Figure 1

Total ion chromatograms of YXJD. Five groups of YXJD consisting of different batches were diluted to 0.06 g/mL and precipitated with an equal amount of methanol. The supernatants were obtained by centrifugation (10000 rpm) for 40 min and analyzed by UPLC-MS/MS using a mobile phase consisting of acetonitrile and 0.1% formic acid aqueous solution with a gradient program. The external standard one-point method was used to calculate the sample content based on the following formula: control sample injection quantity/sample peak area = sample injection quantity/sample peak area (a, b). Total ion flow in ESI positive mode. Counts (%) versus acquisition time (min) (c). Total ion flow in ESI anion mode. Counts (%) versus acquisition time (min) (d).