Table 5.
Results of accuracy.
| Spiked level (%) | Replicate number | Potassium guaiacolsulfonate | Sodium benzoate | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Spiked amount of standard (mg) | Sum of peaks' area | Recovery (%) | Mean recovery, RSD (%) | Spiked amount of standard (mg) | Peak area | Recovery (%) | Mean recovery, RSD (%) | ||
| 80 | 1 | 23.0 | 1988231 | 102.0 | 101.9 | 38.4 | 1532007 | 101.2 | 101.8 |
| 2 | 20.6 | 1776475 | 101.7 | 38.6 | 1552884 | 102.0 | |||
| 3 | 20.5 | 1777035 | 101.9 | 0.1 | 38.6 | 1552844 | 102.0 | 0.5 | |
|
| |||||||||
| 100 | 1 | 25.3 | 2159862 | 100.7 | 100.3 | 48.0 | 1918840 | 101.4 | 101.7 |
| 2 | 25.2 | 2199415 | 100.5 | 48.2 | 1934702 | 101.8 | |||
| 3 | 25.4 | 2199538 | 99.8 | 0.5 | 48.2 | 1935383 | 101.9 | 0.3 | |
|
| |||||||||
| 120 | 1 | 30.6 | 2648436 | 100.7 | 100.7 | 57.0 | 2260622 | 100.6 | 101.0 |
| 2 | 30.9 | 2635143 | 100.6 | 57.2 | 2283777 | 101.3 | |||
| 3 | 30.8 | 2634916 | 100.9 | 0.2 | 57.3 | 2284080 | 101.1 | 0.4 | |