| 
      
        | Concentration (mg kg-1) | Accuracy |  
        |  | Precision |  
        | Trueness (relative bias  %) | Repeatability (% RSD) | Intermediate    precision (% RSD) |  
        | Std | He | Std | He | Std | He |  
        | 0.06 (½ LOQ) | 26 | 9.9 | 36 | 26 | 38 | 26 |  
        | 0.13 (LOQ) | 2.8 | -1.0 | 8.0 | 11 | 11 | 14 |  
        | 0.26 (2x LOQ) | 9.0 | 3.0 | 3.9 | 8.2 | 7.1 | 8.2 |  
        | 0.747 | -13 | -12 | 7.0 | 5.5 | 9.3 | 12 |  
        | 1.3 | -3.2 | -8.7 | 5.0 | 5.1 | 6.4 | 8.3 |  
        | 3.5 | -1.1 | -3.3 | 8.3 | 9.3 | 9.6 | 9.8 |  
        | 3.9 | 1.7 | 0.3 | 4.5 | 4.0 | 4.5 | 4.2 |  |