Table 2.
The recoveries and the detection limit of creatinine, uric acid, hypoxanthine and xanthine in the human urine sample.
| Analysts | Actual concentration of sample (mg/L) | Standard addeda (mg/L) | Mean recoveryb (%)±SD | LOD (mg/L) |
|---|---|---|---|---|
| Creatinine | 861.25 | 160 | 97.90±0.84 | 0.010 |
| 320 | 93.49±0.79 | |||
| Uric acid | 411.78 | 80 | 96.45±4.20 | 0.025 |
| 160 | 95.38±1.76 | |||
| Hypoxanthine | 51.96 | 50 | 112.46±1.08 | 0.050 |
| 100 | 115.78±0.94 | |||
| Xanthine | 54.44 | 20 | 97.13±3.16 | 0.025 |
| 50 | 90.82±0.96 | |||
a
Concentrations of standards are expressed as the equivalent concentrations added in the final injected solutions. Each level of standard added was replicated six times.
b
Calculated recovery (%)=(amount observed−original amount)/added amount×100%.