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PARAMETERS FOR WHICH PERFORMANCE CHARACTERISTICS ARE SPECIFIED 2.1. For the following parameters, the specified performance characteristics are that the method of analysis used must, as a minimum, be capable of measuring concentrations equal to the parametric value with a trueness, precision and limit of detection specified. Whatever the sensitivity of the method of analysis used, the result must be expressed using at least the same number of decimals as for the parametric value considered in Annex I, Parts B and C. >TABLE> 2.2. For hydrogen ion concentration the specified performance characteristics are that the method of analysis used must be capable of measuring concentrations equal to the parametric value with a trueness of 0,2 pH unit and a precision of 0,2 pH unit. Note 1 (1*): Trueness is the systematic error and is the difference between the mean value of the large number of repeated measurements and the true value. Note 2 (2*): Precision is the random error and is usually expressed as the standard deviation (within and between batch) of the spread of results about the mean. Acceptable precision is twice the relative standard deviation. Note 3: Limit of detection is either: three times the relative within batch standard deviation of a natural sample containing a low concentration of the parameter, or five times the relative within batch standard deviation of a blank sample. Note 4: The method should determine total cyanide in all forms. Note 5: Oxidation should be carried out for 10 minutes at 100 °C under acid conditions using permanganate. Note 6: The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. The limit of detection may not be achievable for all pesticides at present, but Member States should strive to achieve this standard. Note 7: The performance characteristics apply to the individual substances specified at 25 % of the parametric value in Annex I. Note 8: The performance characteristics apply to the individual substances specified at 50 % of the parametric value in Annex I.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.