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. Author manuscript; available in PMC: 2014 Aug 25.
Published in final edited form as: J Chromatogr A. 2006 Sep 27;1135(1):27–35. doi: 10.1016/j.chroma.2006.09.015

Table 1.

Linearity of calibration curve for ten saponins

Compounda Calibration curveb R2 Linear range (μg) LOD (μg) LOQ (μg)
1 Y = 804.7x −478.1 0.9988 0.30–20 0.16 0.34
2 Y = 840.7x −448.7 0.9998 0.28–20 0.14 0.32
3 Y = 828.7x −586.0 0.9931 0.38–20 0.22 0.48
4 Y = 905.6x −497.4 0.9978 0.22–18 0.12 0.28
5 Y = 818.8x −499.9 0.9999 0.28–20 0.18 0.46
6 Y = 743.7x −637.3 0.9951 0.28–20 0.18 0.42
7 Y = 475.8x −410.4 0.9973 0.54–20 0.36 0.76
8 Y = 770.5x −721.1 0.9977 0.42–20 0.28 0.62
9 Y = 945.4x −852.4 0.9944 0.24–18 0.16 0.36
10 Y = 687.2x −674.3 0.9981 0.36–20 0.28 0.74
a

(1) deapi-platycoside E; (2) platycoside E; (3) deapi-platycodin D3; (4) platycodin D3; (5) deapi-platycodin D; (6) platycodin D; (7) polygalacin D; (8) 3″-O-acetyl polygalacin D; (9) platycodin A; and (10) 2″-O-acetyl polygalacin D.

b

Y: peak area; x: concentration (μg).