| Peak Areak (mAu) | Retention Time (minutes) | |||||
| CYS-SE | GS-SE | CYSGLY-SE | CYS-SE | GS-SE | CYSGLY-SE | |
| Mean | 47.29 | 36.69 | 87.63 | 1.17 | 2.92 | 3.95 |
| S.D. | 1.666 | 2.407 | 2.185 | 0.054 | 0.075 | 0.071 |
| %RSD | 3.523 | 6.560 | 2.494 | 4.596 | 2.551 | 1.811 |