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BS EN 14805:2022 - TC Tracked Changes. Chemicals used for treatment of water intended for human consumption. Sodium chloride for on site electrochlorination using non-membrane technology, 2023
- 30462671
- A-30404892 [Go to Page]
- undefined
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Description [Go to Page]
- 4.1 Identification [Go to Page]
- 4.1.1 Chemical name
- 4.1.2 Synonym or common name
- 4.1.3 Relative molecular mass
- 4.1.4 Empirical formula
- 4.1.5 Chemical formula
- 4.1.6 CAS Registry Number
- 4.1.7 EINECS Reference
- 4.2 Commercial forms
- 4.3 Physical properties [Go to Page]
- 4.3.1 Appearance
- 4.3.2 Density
- 4.3.3 Solubility (in water)
- 4.3.4 Vapour pressure
- 4.3.5 Boiling point at 100 kPa
- 4.3.6 Melting point
- 4.3.7 Specific heat
- 4.3.8 Viscosity (dynamic)
- 4.3.9 Critical temperature
- 4.3.10 Critical pressure
- 4.3.11 Physical hardness
- 4.4 Chemical properties
- 5 Purity criteria [Go to Page]
- 5.1 General
- 5.2 Composition of commercial product [Go to Page]
- 5.2.1 Sodium chloride content
- 5.2.2 Anticaking agent
- 5.3 Impurities and main by-products
- 5.4 Chemical parameters
- 6 Test methods [Go to Page]
- 6.1 Sampling
- 6.2 Analyses [Go to Page]
- 6.2.1 Main product
- 6.2.2 Impurities [Go to Page]
- 6.2.2.1 Water-insoluble matter
- 6.2.2.2 Moisture content
- 6.2.2.3 Bromide
- 6.2.3 Chemical parameters [Go to Page]
- 6.2.3.1 Cadmium, chromium, nickel, lead, antimony, selenium
- 6.2.3.2 Mercury
- 6.2.3.3 Arsenic
- 7 Labelling, transportation, storage [Go to Page]
- 7.1 Means of delivery
- 7.2 Risk and safety labelling in accordance with EU directives
- 7.3 Transportation regulations and labelling
- 7.4 Marking
- 7.5 Storage [Go to Page]
- 7.5.1 Long term stability
- 7.5.2 Storage incompatibilities
- Annex A (informative)General information on sodium chloride for electrochlorination [Go to Page]
- A.1 Origin
- A.2 Chemical composition [Go to Page]
- A.2.1 The efficiency of all electrochlorination equipment can be impaired particularly by iron and manganese. Levels of both of these elements should be less than 10 mg/kg.
- A.2.2 Other natural components of sodium chloride such as calcium, magnesium, sulfate and organic content might affect equipment efficiency. As these requirements can vary considerably, it is important that both equipment and salt suppliers are consulted when selecting salt for this application.
- A.2.3 It should also be noted that the quality of water used in preparing salt solutions for this application might also need to be taken into account when selecting the salt to be used.
- A.2.4 The sodium chlorate (NaClO3) content of the sodium hypochlorite produced should not exceed a mass fraction of 5,4 % of available chlorine in line with the requirements of EN 901 [3].
- A.3 Use [Go to Page]
- A.3.1 Function
- A.3.2 Form in which the product is used
- A.3.3 Consumption of salt for electrochlorination
- A.3.4 Means of application
- A.3.5 Secondary effects
- A.3.6 Removal of excess product
- A.4 Rules for safe handling and use
- A.5 Emergency procedures [Go to Page]
- A.5.1 First aid
- A.5.2 Spillage
- A.5.3 Fire
- Annex B (normative)Analytical methods [Go to Page]
- B.1 Determination of antimony, cadmium, chromium, iron, lead, manganese, nickel and selenium [inductively coupled plasma optical emission spectrometry (ICP-OES)] [Go to Page]
- B.1.1 General
- B.1.2 Principle
- B.1.3 Reagents [Go to Page]
- B.1.3.1 General
- B.1.3.2 Nitric acid, ρ approximately 1,40 g/ml, mass fraction of 65 % solution
- B.1.3.3 Sodium chloride solution, β(NaCl) = 250 g/l
- B.1.3.4 Scandium (reference element) solution, β (Sc) = 50 mg/l
- B.1.3.5 Element, stock solution, β (each element) = 1 000 mg/l certified commercial solutions
- B.1.3.6 Argon, pressure not less than 700 kPa. The argon used can be compressed or liquefied gas
- B.1.4 Apparatus [Go to Page]
- B.1.4.1 General
- B.1.4.2 Spectrometer ICP-OES
- B.1.5 Procedure [Go to Page]
- B.1.5.1 Test portion
- B.1.5.2 Test solution
- B.1.5.3 Calibration and verification solutions
- B.1.5.4 Determination
- B.1.6 Expression of results [Go to Page]
- B.1.6.1 Evaluation
- B.1.6.2 Calculation
- B.1.6.3 Repeatability and reproducibility
- B.1.6.4 Limit of quantification (LOQ)
- B.2 Determination of Arsenic (Silver Diethyldithiocarbamate Photometric Method) [Go to Page]
- B.2.1 General
- B.2.2 Principle
- B.2.3 Reactions
- B.2.4 Reagents [Go to Page]
- B.2.4.1 General
- B.2.4.2 Pyridine, ρ approximately 0,980 g/ml
- B.2.4.3 Zinc pellets, 3 mm to 8 mm diameter or any other form of zinc
- B.2.4.4 Hydrochloric acid, ρ approximately 1,19 g/ml, a mass fraction of 37 %
- B.2.4.5 Silver diethyldithiocarbamate, 5 g/l solution in pyridine
- B.2.4.6 Potassium iodide solution, β(KI) approximately 100 g/l
- B.2.4.7 Tin (II) chloride solution, β(SnCl2.2H2O) approximately 400 g/l
- B.2.4.8 Arsenic, stock solution I, β(As) = 1 000 mg/l, commercial standard solution or to be prepared as follows:
- B.2.4.9 Arsenic, stock solution II, β(As) = 2,50 mg/l
- B.2.4.10 Absorbent cotton wool, saturated with lead acetate
- B.2.5 Apparatus [Go to Page]
- B.2.5.1 General
- B.2.5.2 Glass apparatus, with ground glass joints, for the liberation and absorption of arsine.
- B.2.5.3 Spectrophotometer or
- B.2.5.4 Photocolorimeter fitted with a filter ensuring maximum transmission between 520 nm and 560 nm
- B.2.6 Sampling
- B.2.7 Procedure [Go to Page]
- B.2.7.1 Test portion
- B.2.7.2 Test solution
- B.2.7.3 Blank solution
- B.2.7.4 Calibration
- B.2.7.5 Determination
- B.2.8 Expression of results [Go to Page]
- B.2.8.1 Calculation
- B.2.8.2 Repeatability and reproducibility [Go to Page]
