Uric acid, the final product of the purine metabolism, is mainly
excreted by the kidneys. Most of uric acid produced from the
catabolism is reabsorbed into the blood circulation system after
primary filtration and partial secretion by the kidney. Uric acid levels in physiological fluids serve as valuable indicators for certain
clinical conditions. Abnormal level of uric acid in blood serum leads
to several diseases such as gout, renal failure, hypertension, insulin
resistance, and metabolic syndrome [1–4]. So determination of uric
acid in serum plays an important role in laboratory medicine and
thus is routinely determined in the clinical laboratory.
Common methods for serum uric acid assay include phosphotungstate assay [5], HPLC-UV or MS [6–8] and enzymatic method
[9–12]. CL [13–18] and electrochemical [19–21] methods were used
to determine the concentration of uric acid. The phosphotungstate
assay is unreliable for accurate determination of the concentration
of uric acid due to turbidity or the presence of ascorbic acid, aspirin,
glutathione and various antibiotics [22]. Although enzymatic assays
are promising due to their high level of selectivity, but still suffer from drawbacks, including the effect of temperature, unstable
and expensive reagents, and large volumes of samples. HPCL methods have received considerable attention due to good efficiency of
separation, but they often suffer from a variety of disadvantages