Table 3.
Spike recovery of human tear sample and relative standard deviation (RSD) (n =3)
| Analyte | Recovery (%) | RSD (%) | Recovery (%) | RSD (%) |
|---|---|---|---|---|
| Spike level of 50 ng/mL | Spike level of 250 ng/mL | |||
| GSH | 117.7 | 4.8 | 118.5 | 5.7 |
| GSSG | 101.9 | 10.2 | 93.3 | 2.5 |
| Spike level of 2 ng/mL | Spike level of 10 ng/mL | |||
| Cys-Gly | 86.8 | 9.6 | 108.9 | 4.3 |
| Glu-Cys | 106.4 | 3.2 | 116.9 | 1.8 |
| Met | 82.8 | 5.5 | 79.6 | 3.9 |
| MeS | 105.9 | 9.0 | 112.9 | 5.4 |
| Cys | 104.4 | 6.8 | 113.1 | 4.0 |
| Cyss | 102.6 | 2.8 | 115.9 | 9.3 |
| Crt | 83.9 | 2.0 | 87.8 | 2.4 |
| Hcys | 95.1 | 3.0 | 124.9 | 4.4 |
| Hcyss | 135.7 | 3.5 | 158.4 | 6.3 |
| NAC | 116.3 | 0.7 | 122.8 | 6.2 |