| Linearity of Total Citric Acid by HPLC Method | ||
| % Level | Citric Acid | |
| Concentration (µg/mL) | Mean Peak Area | |
| 25 | 149 | 197,204 |
| 75 | 448 | 589,406 |
| 100 | 597 | 789,995 |
| 125 | 747 | 985,624 |
| 175 | 1045 | 1,374,586 |
| Slope | 1315.2458 | |
| Y Intercept | 3379.5264 | |
| r2 | 1 | |
| Bias | 0.2 | |