Quantification of Barbatusin and 3β-Hydroxy-3-deoxybarbatusin in Plectranthus Species by HPLC-DAD

Table 2

Precision and accuracy for 1 and 2 in Plectranthus samples.

Precision				Accuracy
Analyte	Amount; µg/mL	Intraday; RSD (%)	Interday; RSD (%)	Amount added (µg/mL)	Amount found (µg/mL)	Recovery; (mean ± RSD, %, )
1	85.0	3.42	5.70	186.5	152.3	81.7 ± 1.74
	170.0	2.10	3.31	249.0	259.1	104.0 ± 2.10
	680.0	1.92	6.01	374.0	384.0	102.7 ± 3.39
2	65.0	3.44	2.68	37.8	40.3	107.6 ± 3.60
	130.0	3.34	6.21	47.8	50.4	105.4 ± 2.94
	325.0	1.36	10.95	62.8	64.1	102.1 ± 2.73