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Normas DIN – AENOR
DIN EN ISO 7393-2:2019-03

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

Qualité de l'eau - Dosage du chlore libre et du chlore total - Partie 2: Méthode colorimétrique à la N,N-dialkylphénylène-1,4 diamine destinée aux contrôles de routine (ISO 7393-2:2017); Version allemande EN ISO 7393-2:2018

Wasserbeschaffenheit - Bestimmung von freiem Chlor und Gesamtchlor - Teil 2: Kolorimetrisches Verfahren mit N,N-Dialkyl-1,4-Phenylendiamin für Routinekontrollen (ISO 7393-2:2017); Deutsche Fassung EN ISO 7393-2:2018

Fecha:
2019-03 /Active
Equivalencias internacionales:

EN ISO 7393-2 (2018-01)

ISO 7393-2 (2017-12)

Relación con otras normas DIN:
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
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