Standard addition concentration (μg/kg) | Background value (μg/kg) | Mean (μg/kg) | Recovery rate (%) | Coefficient of variation (%) | GB/T27404-2008 [27] (%) | Linear equation | Correlation r | Detection limit (μg/kg) | |
Recovery rate | Coefficient of variation | ||||||||
30 | 0 | 32.1 | 107.1 | 0.4 | 60 - 120 | 15 - 21 | Y = 0.36021X + 0.018416 | 0.9991 | 0.684 |
60 | 61.3 | 102.2 | 0.7 | 15 - 21 | |||||
100 | 97.2 | 96.9 | 0.7 | 15 - 21 |