ERYCA value without incubation 

ERYCA value after 15 min incubation

mean

Conf. intervala

%

mean

Conf. intervala

%

Antioxidant

(µMole QE/ µMole of standard)

 

(µMole QE/µMole of standard)

 

Quercetin

1.07

0.13

12.1%

1.04

0.07

5.8%

Ascorbic acid

0.18

0.03

16.7%

0.12

0.01

10.4%

Tannic acid

6.12

1.21

19.7%

4.58

0.20

4.5%

Catechin

1.87

0.17

9 %

1.71

0.037

2.2 %

Trolox

0.46

0.06

13%

0.40

0.02

5.9%

Fruit extract

(µMole QE. g-1 DM)

 

 (µMole QE. g-1 DM)

 

Blackberrya

352

33.5

9.5%

390

15.6

4 %

Noni

80

1.25

1.6%

84

1.5

1.8%

aindicates variation with respect to mean of confident interval at 95 % ( 1.96)
Table 1: Reproducibility and accuracy of the ERYCA test for different antioxidant standards and two tropical fruit juices with a 15-min incubation and no incubation previous to the test.