Evaluation of Antioxidant Capacity (ABTS and CUPRAC) and Total Phenolic Content (Folin-Ciocalteu) Assays of Selected Fruit, Vegetables, and Spices

Table 3

Correlation of three assays in three different solvent systems ().

(a)

		MQ-water			40% ethanol			mßCD
		ABTS	CUPRAC	TPC	ABTS	CUPRAC	TPC	ABTS	CUPRAC	TPC
MQ-water	ABTS	1.0000
	CUPRAC	0.9852	1.0000
	TPC	0.9779	0.9742	1.0000
40% ethanol	ABTS	0.9758	0.9701	0.9677	1.0000
	CUPRAC	0.9411	0.9679	0.9526	0.9773	1.0000
	TPC	0.9634	0.9511	0.9615	0.9844	0.9571	1.0000
mßCD	ABTS	0.8578	0.8813	0.8887	0.9376	0.9634	0.9154	1.0000
	CUPRAC	0.8727	0.9127	0.9075	0.9376	0.9822	0.9172	0.9815	1.0000
	TPC	0.9230	0.8900	0.9011	0.9065	0.8428	0.9402	0.7463	0.7761	1.0000

(b)

		MQ-water			40% ethanol			mßCD
		ABTS	CUPRAC	TPC	ABTS	CUPRAC	TPC	ABTS	CUPRAC	TPC
MQ-water	ABTS	1.0000
	CUPRAC	0.7953	1.0000
	TPC	0.8892	0.7215	1.0000
40% ethanol	ABTS	0.8309	0.5649	0.6864	1.0000
	CUPRAC	0.8138	0.8834	0.7282	0.7835	1.0000
	TPC	0.7514	0.4628	0.6529	0.8632	0.6691	1.0000
mßCD	ABTS	0.8492	0.6086	0.7806	0.9399	0.8286	0.8419	1.0000
	CUPRAC	0.8844	0.8767	0.7774	0.8202	0.9825	0.6999	0.8708	1.0000
	TPC	0.7628	0.4862	0.5845	0.8551	0.6219	0.9277	0.7346	0.6566	1.0000

. The values in (b) are the correlations taken () without considering green tea and pomegranate husk sample results due to the limited sample numbers and their very high assay results.