BS EN 938:2016
$167.15
Chemicals used for treatment of water intended for human consumption. Sodium chlorite
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 36 |
This European Standard is applicable to sodium chlorite used for treatment of water intended for human consumption. It describes the characteristics of sodium chlorite and specifies the requirements and the corresponding test methods for sodium chlorite. It gives information on its use in water treatment.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 8 | 1 Scope 2 Normative references 3 Description 3.1 Identification 3.1.1 Chemical name 3.1.2 Synonym or common name 3.1.3 Relative molecular mass 3.1.4 Empirical formula 3.1.5 Chemical formula 3.1.6 CAS Registry Number ) |
| 9 | 3.1.7 EINECS reference ) 3.2 Commercial form 3.3 Physical properties 3.3.1 Appearance 3.3.2 Density 3.3.3 Solubility in water 3.3.4 Vapour pressure 3.3.5 Boiling point at 100 kPa ) 3.3.6 Crystallization point |
| 10 | 3.3.7 Specific heat 3.3.8 Viscosity (dynamic) 3.3.9 Critical temperature 3.3.10 Critical pressure 3.3.11 Physical hardness 3.4 Chemical properties 4 Purity criteria 4.1 General |
| 11 | 4.2 Composition of commercial product 4.3 Impurities and main by-products 4.4 Chemical parameters |
| 12 | 5 Test methods 5.1 Sampling 5.1.1 General 5.1.2 Sampling from drums and bottles 5.1.2.1 General 5.1.2.2 Surface sampling 5.1.2.3 Bottom sampling 5.1.3 Sampling from tanks and tankers |
| 13 | 5.2 Analysis 5.2.1 Determination of sodium chlorite (main product) 5.2.1.1 General 5.2.1.2 Principle 5.2.1.3 Reagents 5.2.1.4 Apparatus |
| 14 | 5.2.1.5 Procedure 5.2.1.6 Expression of results 5.2.2 Impurities 5.2.2.1 Determination of sodium chlorate content (NaClO3) |
| 17 | 5.2.3 Chemical parameters 5.2.3.1 Determination of antimony (Sb), arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), nickel (Ni) and selenium (Se) |
| 18 | 5.2.3.2 Determination of mercury (Hg) |
| 19 | 6 Labelling – Transportation – Storage 6.1 Means of delivery 6.2 Labelling according to the EU Legislation ) 6.3 Transportation regulations and labelling |
| 20 | 6.4 Marking 6.5 Storage 6.5.1 General 6.5.2 Long term stability 6.5.3 Storage incompatibilities |
| 21 | Annex A (informative)General information on sodium chlorite A.1 Origin A.1.1 Raw materials A.1.2 Manufacturing process A.2 Use A.2.1 Function A.2.2 Form in which it is used A.2.3 Treatment dose A.2.4 Means of application A.2.5 Secondary effects |
| 22 | A.2.6 Removal of excess product A.3 Routine analyses A.3.1 Determination of sodium chlorite (NaClO2) A.3.1.1 General A.3.1.2 Principle A.3.1.3 Reagents |
| 23 | A.3.1.4 Apparatus A.3.1.5 Procedure A.3.1.6 Expression of results |
| 24 | A.3.2 Determination of chlorate ion (ClO3-) A.3.2.1 General A.3.2.2 Principle A.3.2.3 Reagents A.3.2.4 Apparatus A.3.2.5 Procedure |
| 25 | A.3.2.6 Expression of results A.3.3 Determination of chemical parameters |
| 26 | Annex B (normative)General rules relating to safety B.1 Rules for safe handling and use B.2 Emergency procedures B.2.1 First aid B.2.2 Spillage B.2.3 Fire |
| 27 | Annex C (normative)Determination of arsenic, antimony and selenium (atomic absorption spectrometry hydride technique) C.1 Safety precautions C.2 General principle C.3 Interferences C.4 Reagents |
| 29 | C.5 Apparatus |
| 31 | C.6 Procedure C.6.1 Preparation of the apparatus |
| 32 | C.6.2 Preparation of calibration solutions C.6.3 Preparation of test solutions and standard solutions C.6.4 Determination of arsenic with sodium borohydride C.6.5 Determination of selenium with sodium borohydride |
| 33 | C.6.6 Determination of antimony with sodium borohydride C.7 Calculation |
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