| Linearity of Free Citric Acid by Titration Method | ||||
| % Level | Amount Added | volume Taken for Titration | Volume of NaOH Consumed | PPM of Free Citric Acid Present in the 50 mL of the Sample |
| (µg/mL) | (mL) | (mL) | PPM | |
| 25 | 12.5 | 50 | 0.99 | 12.68 |
| 75 | 37.5 | 50 | 2.88 | 36.88 |
| 100 | 50 | 50 | 3.89 | 49.81 |
| 125 | 62.5 | 50 | 4.88 | 62.49 |
| 175 | 87.5 | 50 | 6.71 | 85.93 |
| Y Intercept | 16.65 | |||
| r2 | 0.98 | |||
| Bias | 4.17 | |||