Chemical compositions, chromatographic fingerprints and antioxidant activities of Citri Exocarpium Rubrum (Juhong)

Table 1 Regression data, LODs and LOQs for the three analytes assayed in HPLC-UV chromatograms

Analyte	Calibration curve^a	R ²	Linear range (mg/L)	LOD^b (ng/mL)	LOQ^c (ng/mL)
1	y = 3.0149x − 21.812	0.9994	31.20–499.20	418.8	128.6
2	y = 41.396x − 4.1898	0.9995	0.75–11.94	6.8	24.7
3	y = 50.822x + 3.2433	0.9996	0.31–5.03	12.0	40.8

1 Hesperidin, 2 Nobiletin, 3 Tangeretin
^a y is the peak area in UV chromatograms detected in 330 nm, x is the concentration (mg/L) of the analyte
^bLOD refers to the limit of detection, s/n = 3
^cLOQ refers to the limit of quantification, s/n = 10

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