Research Article
Simultaneous Voltammetric Determination of Uric Acid, Xanthine, and Hypoxanthine Using CoFe2O4/Reduced Graphene Oxide-Modified Electrode
Table 1
Tolerance limit of interfering species at
in 0.2 M PBS pH 5.
| | Interferent | Interferent/analyte molar ratio | UA | XA | HX | | (μA) | RE (%) | (μA) | RE (%) | (μA) | RE (%) |
| | Paracetamol | 10 : 1 | 4.25 | 17.49 | 3.68 | −5.00 | 1.96 | −1.23 | | Ascorbic acid | 50 : 1 | 4.81 | 28.05 | 3.75 | −7.57 | 2.03 | −4.86 | | D-Glucose | 1000 : 1 | 3.40 | −1.92 | 3.65 | 0.06 | 1.96 | −1.11 | | KCl | 20 : 1 | 1.429 | 2.15 | 4.574 | 1.64 | 2.60 | 0.902 | | Na2CO3 | 20 : 1 | 0.562 | −5.23 | 3.66 | 2.52 | 2.262 | 4.31 | | MgSO4 | 100 : 1 | 0.620 | −1.27 | 3.530 | −3.29 | 2.085 | −5.51 |
|
|
