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. 2025 Jun 27;14(7):791. doi: 10.3390/antiox14070791

Table 4.

Antioxidant capacity (µmol Trolox equivalent/g) and total phenolic content (TPC, µmol gallic acid equivalent/g) of the OMW-2000XAD complex. As a comparison, the values of major olive antioxidant phenolic compounds have been included.

Assay OMW-2000XAD Hydroxytyrosol Caffeic Acid
TEAC 2539 ± 38 1/(4976) 2 11,322/(1.7) 10,700/(1.9)
DPPH 701 3 ± 4/(1374) 8784 3/(1.4) 7148 3/(1.3)
FRAP 1038 ± 35/(2035) 5550/(0.9) Not found
ORAC 3783 ± 76/(7415) 40,405/(6.2) Not found
TPC 5277 ± 186/(10,343) - -

1 Standard error of the mean of three replicates (n = 3). 2 Results given in parentheses are expressed as mol Trolox equivalent/mol. 3 IC50 value. The values for hydroxytyrosol and caffeic acid were taken from Bermúdez-Oria and co-workers [60] and Rubio-Senent and co-workers [61].