Part 2 Analytical methodsI1
England and Wales
Table 1
Prescribed methods of analysis for microbiological parameters
| Parameter | Method |
|---|---|
| Escherichia coli (E. coli) | EN ISO 9308-1 or EN ISO 9308-2 |
| Enterococci | EN ISO 7899-2 |
| Pseudomonas aeruginosa | EN-ISO 16266 |
| Colony count 22°C — enumeration of culturable microorganisms | EN ISO 6222 |
| Colony count 36°C — enumeration of culturable microorganisms | EN ISO 6222 |
| Clostridium perfringens (including spores) | EN ISO 14189 |
Table 2
Prescribed performance characteristics for methods of analysis for chemical and indicator parameters: trueness, precision and limit of detection (on or before 31 December 2019)
| Parameter | Trueness % of prescribed concentration or value or specification (except for pH) | Precision % of prescribed concentration or value or specification (except for pH) | Limit of detection % of prescribed concentration or value or specification (except for pH) |
|---|---|---|---|
(1) The method of analysis should determine total cyanide in all forms. | |||
(2) EN ISO 8476. | |||
(3) The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. 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. | |||
(4) The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B of Part 1 of Schedule 1. | |||
(5) The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B of Part 1of Schedule 1. | |||
(6) The performance characteristics apply to the prescribed value of 4 NTU. | |||
(7) The performance characteristics apply to the specification of 1 NTU for surface waters or ground waters influenced by surface water. | |||
| Aluminium | 10 | 10 | 10 |
| Ammonium | 10 | 10 | 10 |
| Antimony | 25 | 25 | 25 |
| Arsenic | 10 | 10 | 10 |
| Benzene | 25 | 25 | 25 |
| Benzo(a)pyrene | 25 | 25 | 25 |
| Boron | 10 | 10 | 10 |
| Bromate | 25 | 25 | 25 |
| Cadmium | 10 | 10 | 10 |
| Chloride | 10 | 10 | 10 |
| Chromium | 10 | 10 | 10 |
| Colour | 10 | 10 | 10 |
| Conductivity | 10 | 10 | 10 |
| Copper | 10 | 10 | 10 |
| Cyanidef1 | 10 | 10 | 10 |
| 1.2-dichloroethane | 25 | 25 | 10 |
| Fluoride | 10 | 10 | 10 |
| Hydrogen ion concentration pH (expressed in pH units) | 0.2 | 0.2 | |
| Iron | 10 | 10 | 10 |
| Lead | 10 | 10 | 10 |
| Manganese | 10 | 10 | 10 |
| Mercury | 20 | 10 | 20 |
| Nickel | 10 | 10 | 10 |
| Nitrate | 10 | 10 | 10 |
| Nitrite | 10 | 10 | 10 |
| Oxidisabilityf2 | |||
| Pesticides and related productsf3 | 25 | 25 | 25 |
| Polycyclic aromatic hydrocarbonsf4 | 25 | 25 | 25 |
| Selenium | 10 | 10 | 10 |
| Sodium | 10 | 10 | 10 |
| Sulphate | 10 | 10 | 10 |
| Tetrachloroethenef5 | 25 | 25 | 10 |
| Tetrachloromethane | 20 | 20 | 20 |
| Trichloroethene | 25 | 25 | 10 |
Trihalomethanes: Total | |||
| 25 | 25 | 10 | |
| Turbidityf6 | 10 | 10 | 10 |
| Turbidityf7 | 25 | 25 | 25 |
Table 3
Method of analysis for chemical and indicator parameters: uncertainty of measurementf8
| Parameter | Uncertainty of measurement % of parametric value (except for pH) |
|---|---|
(1) The uncertainty of measurement must not be used as an additional tolerance to the parametric values set out in Schedule 1. | |
(2) If the value of uncertainty of measurement cannot be met, the best available technique should be selected (up to 60%). | |
(3) The method of analysis should determine total cyanide in all forms. | |
(4) EN ISO 8476. | |
(5) The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. 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. | |
(6) The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B of Part 1 of Schedule 1. | |
(7) The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B of Part 1 of Schedule 1. | |
(8) The uncertainty of measurement must be estimated at the level of 3mg/l of TOC. CEN 1484 Guidelines for the determination of TOC and dissolved organic carbon must be used. | |
(9) The uncertainty of measurement must be estimated at the level of 1,0 NTU in accordance with EN ISO 7027. | |
| Aluminium | 25 |
| Ammonium | 40 |
| Antimony | 40 |
| Arsenic | 30 |
| Benzene | 40 |
| Benzo(a)pyrenef9 | 50 |
| Boron | 25 |
| Bromate | 40 |
| Cadmium | 25 |
| Chloride | 15 |
| Chromium | 30 |
| Conductivity | 20 |
| Copper | 25 |
| Cyanidef10 | 30 |
| 1,2-dichloroethane | 40 |
| Fluoride | 20 |
| Hydrogen ion concentration pH (expressed in pH units) | 0.2 |
| Iron | 30 |
| Lead | 25 |
| Manganese | 30 |
| Mercury | 30 |
| Nickel | 25 |
| Nitrate | 15 |
| Nitrite | 20 |
| Oxiedisabilityf11 | 50 |
| Pesticidesf12 | 30 |
| Polycyclic aromatic hydrocarbonsf13 | 50 |
| Selenium | 40 |
| Sodium | 15 |
| Sulphate | 15 |
| Tetrachloroethenef14 | 30 |
| Trichloroethene | 40 |
| Trihalomethanes: total | 40 |
| Total organic carbon (TOC)f15 | 30 |
| Turbidityf16 | 30 |
Annotations
Commencement
- I1
Sch. 4 Pt. 2 in force at 20.11.2017, see reg. 1
Footnotes
- f1
(1)
The method of analysis should determine total cyanide in all forms.
- f2
(2)
EN ISO 8476.
- f3
(3)
The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. 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.
- f4
(4)
The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B of Part 1 of Schedule 1.
- f5
(5)
The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B of Part 1of Schedule 1.
- f6
(6)
The performance characteristics apply to the prescribed value of 4 NTU.
- f7
(7)
The performance characteristics apply to the specification of 1 NTU for surface waters or ground waters influenced by surface water.
- f8
(1)
The uncertainty of measurement must not be used as an additional tolerance to the parametric values set out in Schedule 1.
- f9
(2)
If the value of uncertainty of measurement cannot be met, the best available technique should be selected (up to 60%).
- f10
(3)
The method of analysis should determine total cyanide in all forms.
- f11
(4)
EN ISO 8476.
- f12
(5)
The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. 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.
- f13
(6)
The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B of Part 1 of Schedule 1.
- f14
(7)
The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B of Part 1 of Schedule 1.
- f15
(8)
The uncertainty of measurement must be estimated at the level of 3mg/l of TOC. CEN 1484 Guidelines for the determination of TOC and dissolved organic carbon must be used.
- f16
(9)
The uncertainty of measurement must be estimated at the level of 1,0 NTU in accordance with EN ISO 7027.