Table 1.

PLS correlation between data of reference analysis and NMR spectra of sage products (separately for tinctures and teas, 1D NOESY experiments).

Parameter	Reference range	NMR range	PLS factors	Calibration		Validation
				RMSEa	R2	RMSE	R2
Ethanol-containing medicines
Camphor (mg/L)	0–883	0–3	6	16	0.98	32	0.94
FC	0.6–40	0–3	5	13	0.94	19	0.90
Herbal teas (water infusions)
Camphor (mg/L)	1.5–55	0–3	4	2.4	0.79	2.87	0.76
FC	5–15	0–3	7	0.27	0.99	1.63	0.69
ORAC (mmol trolox equivalents/100 mL)	0.4–1.4	0–3	4	0.03	0.98	0.11	0.76
Luteolin-7-O-glucuronide (mg/L)	37–100	6–10	7	4.3	0.98	14	0.72
Sum of flavone glycosides (mg/L)	52–130	6–10	8	0.46	0.99	13	0.86
Sum of rosmarinic acid derivatives (mg/L)	23–208	0–10	4	9.0	0.98	15	0.91
Sum of carnosol derivatives (mg/L)	33–53	0–10	5	0.8	0.99	5.4	0.71

Note:

^aRoot-mean squared error.