Schedule 5 Analytical methodology

“Uncertainty of measurement” is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurement, based on the information used. The performance criterion for measurement uncertainty (k = 2) is at least the percentage of the parametric value stated in the table.

If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60% of the parametric value).

The method determines total cyanide in all forms.

Reference method: European standard EN ISO 8467 entitled “Water quality – Determination of permanganate index (ISO 8467)”.

The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30% can be achieved for several pesticides, higher values up to 80 % may be allowed for a number of pesticides.

The performance characteristics apply to individual substances, specified at 25% of the parametric value in Part I of Table B in Schedule 1.

The performance characteristics apply to individual substances, specified at 50% of the parametric value in Part I of Table B in Schedule 1.

The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon (TOC) in accordance with European standard EN 1484 entitled “Water analysis – Guidelines for the determination of total organic carbon and dissolved organic carbon”.

The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units) in accordance with European standard EN ISO 7027-1 entitled “Water quality – Determination of turbidity – Part 1: Quantitative methods (ISO 7027-1”.