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BS EN 14805:2022

BS EN 14805:2022

$154.14

Chemicals used for treatment of water intended for human consumption. Sodium chloride for on site electrochlorination using non-membrane technology

Published By Publication Date Number of Pages
BSI 2022 38
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This document is applicable to sodium chloride intended for on-site electrochlorination of water intended for human consumption using non-membrane technology. It describes the characteristics and specifies the requirements and the corresponding test methods for sodium chloride (see Annex B). It gives information on its use in water treatment.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Description
4.1 Identification
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
4.3.1 Appearance
4.3.2 Density
4.3.3 Solubility (in water)
9 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
10 4.3.10 Critical pressure
4.3.11 Physical hardness
4.4 Chemical properties
5 Purity criteria
5.1 General
5.2 Composition of commercial product
5.2.1 Sodium chloride content
11 5.2.2 Anticaking agent
5.3 Impurities and main by-products
5.4 Chemical parameters
12 6 Test methods
6.1 Sampling
6.2 Analyses
6.2.1 Main product
6.2.2 Impurities
6.2.2.1 Water-insoluble matter
6.2.2.2 Moisture content
6.2.2.3 Bromide
15 6.2.3 Chemical parameters
6.2.3.1 Cadmium, chromium, nickel, lead, antimony, selenium
16 6.2.3.2 Mercury
6.2.3.3 Arsenic
7 Labelling, transportation, storage
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
17 7.5 Storage
7.5.1 Long term stability
7.5.2 Storage incompatibilities
18 Annex A (informative)General information on sodium chloride for electrochlorination
A.1 Origin
A.2 Chemical composition
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
A.3.1 Function
A.3.2 Form in which the product is used
19 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
A.5.1 First aid
A.5.2 Spillage
A.5.3 Fire
20 Annex B (normative)Analytical methods
B.1 Determination of antimony, cadmium, chromium, iron, lead, manganese, nickel and selenium [inductively coupled plasma optical emission spectrometry (ICP-OES)]
B.1.1 General
B.1.2 Principle
B.1.3 Reagents
B.1.3.1 General
21 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
B.1.4.1 General
B.1.4.2 Spectrometer ICP-OES
22 B.1.5 Procedure
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
24 B.1.6 Expression of results
B.1.6.1 Evaluation
B.1.6.2 Calculation
B.1.6.3 Repeatability and reproducibility
29 B.1.6.4 Limit of quantification (LOQ)
31 B.2 Determination of Arsenic (Silver Diethyldithiocarbamate Photometric Method)
B.2.1 General
B.2.2 Principle
B.2.3 Reactions
B.2.4 Reagents
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
32 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
B.2.5.1 General
B.2.5.2 Glass apparatus, with ground glass joints, for the liberation and absorption of arsine.
34 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
B.2.7.1 Test portion
B.2.7.2 Test solution
B.2.7.3 Blank solution
B.2.7.4 Calibration
36 B.2.7.5 Determination
B.2.8 Expression of results
B.2.8.1 Calculation
B.2.8.2 Repeatability and reproducibility

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BS EN 14805:2022
$154.14