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Table 2 The standard curves of four flavonoids and two saponins

From: Rapid identification of growth years and profiling of bioactive ingredients in Astragalus membranaceus var. mongholicus (Huangqi) roots from Hunyuan, Shanxi

Compound

Linear regression equationa

Correlation coefficient (r)

Linear range (μg)

P value

Calycosin

Y = 5273.7X − 0.7002

0.9999

0.0795–1.4310

0.0000

Calycosin-7-glucoside

Y = 3214.5X + 110.92

0.9996

0.1236–5.3560

0.0000

Formononetin

Y = 745.58X + 13.24

0.9999

0.0924–6.1600

0.0000

Ononin

Y = 4175.4X + 11.209

0.9999

0.0350–0.7000

0.0000

Astragaloside A

Y = 1.4106X + 2.3673

0.9995

0.3054–30.540

0.0000

AstragalosideII

Y = 1.5954X + 1.8899

0.9996

0.4240–16.9600

0.0000

  1. aFor flavonoids, Y is the peak area score of analyte, X is the concentration of analyte (µg/mL); For saponins, Y is the logarithm of peak area score, X is the logarithm of concentration
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Chinese Medicine

ISSN: 1749-8546

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