Variation in Flavonoid Composition and Radical-Scavenging Activity in Ginkgo biloba L. due to the Growth Location and Time of Harvest

Table 3

Validation characteristics of the ABTS postcolumn assay.

Parameters	ABTS assay
	Trolox	Quercetin	Kaempferol	Isorhamnetin
Linearity range (μg ml^−1)	1–160	4–74	5–84	5–85
Intraday RSD (%)	0.10	0.92	1.28	0.25
Interday RSD (%)	1.77	1.51	2.30	1.15
LOD (μg ml^−1)	0.30	2.10	1.46	2.02
LOQ (μg ml^−1)	1.00	5.20	4.89	6.75

RSD: relative standard deviation, LOD: limit of detection, and LOQ: limit of quantitation.