Table 3.
Inter-day (n = 3) precision for six analytes with the same standard solution.a Chromatographic conditions are the same as in figure 1.
| peak area |
retention time (min) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| compound | 1 | 2 | 3 | mean | RSD (%) | 1 | 2 | 3 | mean | RSD (%) |
| GSH | 149.6 | 148.7 | 149.1 | 149.1 | 0.3 | 3.879 | 3.871 | 3.875 | 3.875 | 0.4 |
| PC2 | 29.4 | 29.4 | 29.9 | 29.6 | 1.0 | 5.359 | 5.354 | 5.355 | 5.356 | 0.3 |
| PC3 | 41.6 | 40.5 | 40.9 | 41.0 | 1.4 | 6.686 | 6.686 | 6.688 | 6.687 | 0.1 |
| PC4 | 20.7 | 20.1 | 20.5 | 20.4 | 1.5 | 7.659 | 7.650 | 7.655 | 7.655 | 0.4 |
| PC5 | 94.9 | 95.8 | 96.1 | 95.6 | 0.7 | 8.367 | 8.369 | 8.371 | 8.369 | 0.2 |
| PC6 | 53.5 | 52.9 | 52.7 | 53.0 | 0.8 | 8.930 | 8.933 | 8.931 | 8.931 | 0.2 |
aThe concentration of GSH, PC2, PC3, PC4, PC5, PC6 and PC6 was 20 µg ml−1.