F1SCHEDULE 12Monitoring of water bottled and labelled as “spring water” and bottled drinking water
PART 9Monitoring obligations relating to indicator parameters
SECTION 4Minimum performance characteristics for a method of analysis
Parameters | Uncertainty of measurement - percentage of the parametric concentration | Other requirements relating to the uncertainty of measurement | Other requirements |
|---|---|---|---|
Aluminium | 25 | ||
Ammonium | 40 | ||
Chloride | 15 | ||
Conductivity | 20 | ||
Iron | 30 | ||
Manganese | 30 | ||
Oxidisability | 50 | ||
Sodium | 15 | ||
Sulphate | 15 | ||
Total organic carbon | 30 | The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon. | BS EN 1484: 1997 entitled “Water analysis —Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC)” (ISBN 0 580 28372 0) published by the BSI on 15th October 1997 must be used. |
Turbidity | 30 | The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity unit in accordance with BS EN ISO 7027-1:2016 entitled “Water quality — Determination of turbidity. Part 1: Quantitative methods (ISO 7027-1: 2016)” (ISBN 978 0 580 81961 2) published by the BSI on 31st July 2016. |