DIN EN ISO 7393-2:2019-03
Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes (ISO 7393-2:2017); German version EN ISO 7393-2:2018
| Fecha edición: |
2019-03-01
En Vigor
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| Idiomas disponibles: | Inglés, Alemán |
| Resumen: | This document specifies a method for the determination of free chlorine and total chlorine in water, readily applicable to lab and field testing; it is based on measurement of the absorption the red DPD colour complex in a photometer or the colour intensity by visual comparison of the colour with a scale of standards that is regularly calibrated. Seawater and waters containing bromides and iodides comprise a group for which special procedures are required. This method is in practice applicable to concentrations, in terms of chlorine, from e. g. 0,000 4 mmol/l to 0,07 mmol/l (e. g. 0,03 mg/l to 5 mg/l) total chlorine. For higher concentrations, the test portion must be diluted. |
| Keywords: | Checks|Chemical analysis and testing|Chemical reactions|Chlorine|Colorimetry|Colour complex|Concentration|Definitions|Determination of content|Drinking water|Interferences|Mathematical calculations|Phenylenediamine|Process colours|Quality|Routine tests|Scales|Water|Water quality|Water testing |
| ICS: | 13.060.50 - Determinación de sustancias químicas en el agua |
| CTN: | |
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Equivalencia Internacional |
Idéntica EN ISO 7393-2:2018 Idéntica ISO 7393-2:2017 |
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Reemplazo Normas |
Reemplaza a DIN EN ISO 7393-2:2000-04 Reemplaza a DIN EN ISO 7393-2:2017-04 |
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