Division D.3.2 Performance criteria
United Kingdom
The specific criteria for methods of analysis used in the monitoring of nitrate levels shall be:
| Precision RSDr may be calculated as 0,66 times Precision RSDR at the concentration of interest. | |||
| Criterion | Concentration range | Recommended value | Maximum permitted value |
|---|---|---|---|
| Recovery | < 500 mg/kg | 60-120 % | |
| ≥ 500 mg/kg | 90-110 % | ||
| Precision RSDR | All | As derived from Horwitz Equation | 2 × value derived from Horwitz Equation |