Precision level | Added concentration (ng mL-1) | Measured concentration (ng mL-1) | Recovery* (%) | Standard deviation | RSD (%) |
---|---|---|---|---|---|
Intra-day (Day1, n = 3) | 50 | 49.6 | 99.20 | 0.71 | 0.72 |
200 | 197.90 | 98.95 | 1.15 | 1.16 | |
300 | 301.20 | 100.40 | 1.40 | 1.39 | |
Inter-day (Whole days, n = 9) | 50 | 49.42 | 98.83 | 1.88 | 1.90 |
200 | 198.70 | 99.35 | 1.67 | 1.69 | |
300 | 301.77 | 100.59 | 0.85 | 0.84 |