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. 2011 Aug 17;16(8):7058–7067. doi: 10.3390/molecules16087058

Figure 1.

Figure 1

Absorbance readings vs. antioxidant capacity of uric acid standards (without and with uricase treatment), combined with absorbance of a sample without (total antioxidant capacity, TAC, 500 ± 6 μmol/L uric acid equivalents) and with uricase treatment (uric acid-independent antioxidant capacity, TAC-UA, 140 ± 2 μmol/L uric acid equivalents). Plasma uric acid is calculated as the difference between TAC and TAC-UA (360 ± 4 μmol/L). The ratio of the uric acid in total antioxidant capacity (UA/TAC) is 72%. All data are expressed as means ± SD. All measurements for each sample were done in triplicate.