- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
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No. in Annex I to the 1975 Directive | Parameters | Limit of detection12 | Precision13 | Accuracy14 | Method of measurement | Materials recommended for the container | |
---|---|---|---|---|---|---|---|
General note: Samples taken at the abstraction point are analysed and measured after sieving (wire mesh sieve) to remove any floating debris such as wood or plastic. | |||||||
1 For waters classified as DW1, Schedule 2 limit. | |||||||
2 For waters classified as DW2 and DW3. | |||||||
3 For waters classified as DW3. | |||||||
4 For waters classified as DW1, DW2 and DW3, Schedule 1 limit. | |||||||
5 For waters classified as DW2, Schedule 1 limit, and DW3. | |||||||
6 For waters classified as DW2 and DW3, Schedule 2 limit. | |||||||
7 Mixture of six standard substances all of the same concentration to be taken into consideration: fluoranthene; 3, 4-benzofluoranthene; 11, 12-benzofluranthene; 3, 4-benzopyrene; 1, 12-benzoperylene; indano/1, 2, 3-ed/pyrene. | |||||||
8 Mixture of three substances all of the same concentration to be taken into consideration: parathion, hexachlorocyclohexane, dieldrin. | |||||||
9 If the samples contain so much suspended matter as to require special preliminary treatment, the accuracy values shown in this Part of Schedule 3 may as an exception be exceeded and will be regarded as a target. These samples must be treated so as to ensure that the analysis covers the largest quantity of substances to be measured. | |||||||
10 As this method is not in current use in all Member States it is not certain that the limit of detection required for checking values in the 1975 Directive can be attained. | |||||||
11 Absence in 5,000 m1 (for waters classified DW1, Schedule 2 limit) and absence in 1,000 m1 (for waters classified DW2, Schedule 2 limit). | |||||||
12 “Limit of detection” means the minimum value of the parameter examined which it is possible to detect. | |||||||
13 “Precision” means the range within which 95% of the results of measurements made on a single sample, using the same method, are located. | |||||||
14 “Accuracy” means the difference between the true value of the parameter examined and the average experimental value obtained. | |||||||
1 | pH | pH unit | – | 0.1 | 0.2 | – Electrometry. Measured in situ at the time of sampling without prior treatment of the sample. | |
2 | Coloration (after simple filtration) | mg/1 Pt Scale | 5 | 10% | 20% | – Filtering through a glass fibre membrane. Photometric method using platinum-cobalt scale. | |
3 | Total suspended solids | mg/1 SS | – | 5% | 10% | – Filtering through a 0.45μm filter membrane, drying at 105°C and weighing | |
– Centrifuging (for at least 5 mins with mean acceleration of 2,800 to 3,200g) drying at 105°C and weighing. | |||||||
4 | Temperature | °C | – | 0.5 | 1 | – Thermometry. Measured in situ at the time of sampling without prior treatment of the sample. | |
5 | Conductivity at 20°C | μs/cm | – | 5% | 10% | – Electrometry. |
No. in Annex I to the 1975 Directive | Parameters | Limit of | Precision13 detection12 | Accuracy14 | Method of measurement recommended for the container | Materials | |
---|---|---|---|---|---|---|---|
6 | Odour | dilution factor at 25 °C | – | – | – | – By successive dilutions. | Glass. |
7 | Nitrates | mg/1 NO3 | 2 | 10% | 20% | – Molecular absorption spectrophotometry. | |
8 | Fluorides | mg/1 F | 0.05 | 10% | 20% |
| |
10 | Dissolved iron | mg/1 Fe | 0.02 | 10% | 20% |
| |
11 | Manganese | mg/1 Mn | 0.011 0.022 | 10% 10% | 20% 20% |
| |
12 | Copper9 | mg/1 Cu | 0.005 0.023 | 10% 10% | 20% 20% |
|
No. in Annex I to the 1975 Directive | Parameters | Limit of detection12 | Precision13 | Accuracy14 | Method of measurement | Materials recommended for the container | |
---|---|---|---|---|---|---|---|
13 | Zinc9 | mg/1 Zn | 0.011 0.02 | 10% 10% | 20% 20% |
| |
14 | Boron9 | mg/1 B | 0.1 | 10% | 20% |
| Materials not containing boron in any significant quantities. |
19 | Arsenic9 | mg/1 As | 0.0021 0.014 | 20% | 20% |
| |
20 | Cadmium9 | mg/1 Cd | 0.0002 0.0015 | 30% | 30% |
| |
21 | Total Chromium9 | mg/1 Cr | 0.01 | 20% | 30% |
| |
22 | Lead9 | mg/1 Pb | 0.01 | 20% | 30% |
| |
23 | Selenium9 | mg/1 Se | 0.005 | – Atomic absorption spectrophotometry. | |||
24 | Mercury9 | mg/1 Hg | 0.0001 0.00025 | 30% | 30% | – Flameless atomic absorption spectrophotometry (cold vaporisation). | |
25 | Barium9 | mg/1 Ba | 0.02 | 15% | 30% | – Atomic absorption spectrophotometry. | |
26 | Cyanide | mg/1 CN | 0.01 | 20% | 30% | – Molecular absorption spectrophotometry. | |
27 | Sulphates | mg/1 SO4 | 10 | 10% | 10% |
| |
28 | Chlorides | mg/1 C1 | 10 | 10% | 10% |
| |
29 | Surfactants (reacting with methylene blue) | mg/1 (laury1 sulphate) | 0.05 | 20% | – Molecular absorption spectrophotometry. | ||
30 | Phosphates | mg/1 P2O5 | 0.02 | 10% | 20% | – Molecular absorption spectrophotometry. | |
31 | Phenols (phenol Index) | mg/1 C6H5OH | 0.0005 0.0015 | 0.0005 30% | 0.0005 50% |
| Glass. |
32 | Dissolved or emulsified hydrocarbons | mg/1 | 0.01 0.042 | 20% | 30% |
| Glass. |
33 | Polycyclic aromatic hydrocarbons9 | mg/1 | 0.00004 | 50% | 50% | – Measurement of fluorescence in the UV after thin layer chromatography. Comparative measurement in relation to a mixture of six control substances with the same concentration7. | Glass or aluminium. |
34 | Total pesticides (parathion, hexachlorocyclohexane, dieldrin)9 | mg/1 | 0.0001 | 50% | 50% | – Gas or liquid chromatography after extraction by suitable solvents and purification. Identification of the constituents of the mixture. Quantitative analysis8. | Glass. |
35 | Chemical oxygen demand (COD) | mg/1 02 | 15 | 20% | 20% | – Potassium dichromate method. | |
36 | Dissolved oxygen saturation rate | % | 5 | 10% | 10% |
| Glass. |
37 | Biochemical oxygen demand (BOD5) at 20°C without nitrification | mg/1 02 | 2 | 1.5 | 2 | – Determination of dissolved oxygen before and after five day incubation at 20 °C ± 1°C in complete darkness. Addition of a nitrification inhibitor. | |
38 | Nitrogen by Kjeldahl method (except in NO2 and NO3) | mg/1 N | 0.3 | 0.5 | 0.5 | – Mineralisation, distillation by Kjeldahl method and ammonium determination by means of molecular absorption spectrophotometry or titration. | |
39 | Ammonium | mg/1 NH4 | 0.011 0.12 | 0.031 10%2 | 0.031 20%7 | – Molecular absorption spectrophotometry. | |
40 | Substances extractable with chloroform | mg/l | 10 | – Extraction at neutral pH value by purified chloroform, evaporation in vacuo at room temperature, weighing of residue. | |||
43 | Total coliforms | /100ml | 51 5006 |
| Sterilised glass. | ||
44 | Faecal coliforms | /100ml | 21 2006 |
| Sterilised glass. | ||
45 | Faecal streptococci | /100 ml | 21 2006 |
| Sterilised glass. | ||
46 | Salmonella11 | 1/5,000ml 1/1,000ml |
| Sterilised glass. |
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