Rapid Screening for Flavone C-Glycosides in the Leaves of Different Species of Bamboo and Simultaneous Quantitation of Four Marker Compounds by HPLC-UV/DAD

Table 2

Regression equations, linear range, LOD, and LOQ for quantitative analysis by HPLC (𝑛=3).

Compound	Linear range (μg/mL)	Regression equation^a	Correlation coefficient (𝑟^2)	LOD (μg/mL)	LOQ (μg/mL)
Isoorientin	0.2–100	𝑌 = 2240𝑋 − 4620	0.9997	0.02	0.07
Orientin	0.2–100	𝑌 = 2590𝑋 − 6080	0.9997	0.02	0.07
Vitexin	0.2–100	𝑌 = 2600𝑋 + 516	0.9998	0.03	0.10
Isovitexin	0.2–100	𝑌 = 2830𝑋 + 3430	0.9998	0.02	0.07

^a𝑌 is the peak area; 𝑋 is the amount (ng).