I want to express ABTS in %. I have extracted 5g powder sample in 50 ml water then diluted 100 times. For an example-
ABTS (%)=100-[(O.D of sample/O.D. of control)*100]
Here, O.D of sample= 0.214, O.D. of control= 1.240
So, ABTS (%)= 78.709
=78.709*1000 (dilution)
=78709
Is it the percentage of ABTS?
ABTS results can not be expressed in percentage. Instead, it can be expressed in mg ascorbic acid equivalent (AAE)/g. First, the calibration curve of ascorbic acid has to prepared and determine the ABTS value of sample. Please refre to the following reference:
Food Hydrocolloids 60 476–485 (2016),
See "Re et al. ANTIOXIDANT ACTIVITY APPLYING AN IMPROVED ABTS RADICAL
CATION DECOLORIZATION ASSAY. Free Radical Biology & Medicine, Vol. 26, Nos. 9/10, pp. 1231–1237, 1999
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