Table 3.

Intra-day and inter-day variability of baicalin and total baicalein determined for NIR, ATR-IR and HPLC-DAD.

	Inter-day variability (%)			Intra-day variability (%)
	ATR-IR	NIR	HPLC	ATR-IR	NIR	HPLC
Baicalin	2.66	3.93	0.55	2.52	2.28	0.20
Total baicalein	2.40	4.76	0.85	1.58	1.97	0.33