. Author manuscript; available in PMC: 2010 Feb 11.

Published in final edited form as: J Agric Food Chem. 2009 Feb 11;57(3):1076–1083. doi: 10.1021/jf8029397

Table 1.

Calibration curve parameters, limit of detection (LOD) and limit of quantification (LOQ) for the five marker compounds identified in the Chinese sweet tea plant.

Compound	Calibration curve	Correlation coefficient (r²)	Linear range (μg/mL)	LOD (μg/mL) (n=6)	LOQ (μg/mL) (n=6)
Gallic acid	y = 89905x - 27934	0.9994	5-50	1.24	3.45
Rutin	y = 60463x - 27542	0.9999	4-20	1.15	2.78
Ellagic acid	y = 130689x + 43120	0.9994	20-200	0.29	2.41
Rubusoside	y = 6278x + 45650	0.9998	140-1400	11.36	37.86
Steviol monoside	y = 8124x - 6071	0.9998	12-120	3.85	11.09