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Normas DIN – AENOR
DIN EN ISO 7393-2:2017-04

DIN EN ISO 7393-2:2017-04

Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes (ISO/DIS 7393-2:2017); German and English version prEN ISO 7393-2:2017 / Note: Date of issue 2017-03-03

Qualité de l'eau - Dosage du chlore libre et du chlore total - Partie 2: Méthode colorimétrique à la N,N-diéthylphénylène-1,4 diamine destinée aux contrôles de routine (ISO/DIS 7393-2:2017); Version allemande et anglaise prEN ISO 7393-2:2017 / Attention: Date de parution 2017-03-03

Wasserbeschaffenheit - Bestimmung von freiem Chlor und Gesamtchlor - Teil 2: Kolorimetrisches Verfahren mit N,N-Diethyl-1,4-Phenylendiamin für Routinekontrollen (ISO/DIS 7393-2:2017); Deutsche und Englische Fassung prEN ISO 7393-2:2017 / Achtung: Erscheinungsdatum 2017-03-03

Fecha Anulación:
2019-03 /Withdrawn
Equivalencias internacionales:

ISO/DIS 7393-2 (2017-01)

prEN ISO 7393-2 (2017-02)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 7393-2:2019-03

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, Concentration, Definitions, Determination of content, Interferences, Mathematical calculations, Quality, Routine tests, Water, Water quality, Water testing
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