Division 7.3.4 Restrictions to cut-off valuesF1

BEQ-based cut-off values calculated from the RSD _R achieved during validation using a limited number of samples with different matrix/congener patterns may be higher than the TEQ-based maximum levels or action thresholds due to a better precision than attainable in routine when an unknown spectrum of possible congener patterns has to be controlled. In such cases, cut-off values shall be calculated from an RSD _R = 25 %, or two-thirds of the maximum level or action threshold shall be preferred.