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Applied Biological Chemistry

Table 1 Linearity, LOD, and LOQ of 1,5-dicaffeoylquinic acid (DCQA) and chicoric acid (CA)

From: Optimization of an analytical HPLC-DAD method for detecting hydroxycinnamic acid derivatives from mixtures of Saussurea grandifolia and Taraxacum coreanum

Compound

tR

Range (mg/mL)

Calibration equationa

r2 b

LOD (mg/mL)

LOQ (mg/mL)

DCQA

16.0

0.025–0.4

Y = 31569X + 41.782

1.0000

5.46 × 10–3

16.54 × 10–3

CA

19.6

0.00625–0.1

Y = 74846X + 21.402

1.0000

0.37 × 10–3

1.14 × 10–3

  1. aY = peak area, X = concentration of standards (mg/mL)
  2. br2 = correlation coefficient for five calibration data points (n = 3)
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