Research Article

Simultaneous Voltammetric Determination of Uric Acid, Xanthine, and Hypoxanthine Using CoFe2O4/Reduced Graphene Oxide-Modified Electrode

Table 4

Determination of UA, XA, and HX in human urine sample.

SamplesAnalyteDetected (mM) Added (mM)Found (mM) Rev (%)Detected by HPLC (mM)

Urine 01UA1.50101.04.250
XA0.04595.40.111
HX<LODn/an/an/an/a
Urine 02UA1.50096.42.180
XA0.045101.90.077
HX<LOD0.750104.8n/a
Urine 03UA1.500105.35.390
XA0.045101.30.012
HX<LOD0.75095.0n/a

n/a: not applicable; Ave: average value; SD: standard deviation; : the number of repetitions of experiments.