Paragraph 4 F1
Performance criteria of the instrumental method of analysis
The detection limit for lead and cadmium must be equal to or lower than— 0,1 mg/litre for lead, 0,01 mg/litre for cadmium.
The detection limit is defined as the concentration of the element in the 4 % acetic acid solution, as referred to in paragraph 3(a), which gives a signal equal to twice the background noise of the instrument.
The limit of quantification for lead and cadmium must be equal to or lower than— 0,2 mg/litre for lead, 0,02 mg/litre for cadmium.
Recovery. The recovery of lead and cadmium added to the 4 % acetic acid solution, as referred to in paragraph 3(a), must lie within 80-120 % of the added amount.
Specificity. The instrumental method of analysis used must be free from matrix and spectral interferences.
Annotations
Textual amendments
Notes on Schedule 4
Modifications
- C1
Sch. 4 applied in part (with modifications) (N.I.) (1.10.2023) by The Windsor Framework (Retail Movement Scheme: Public Health, Marketing and Organic Product Standards and Miscellaneous Provisions) Regulations 2023 (S.I. 2023/959), regs. 1(2), 4(b), Sch. 2 (with regs. 7, 8)