DIN EN ISO 7393-2:2019 Edition

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Water quality – Determination of free chlorine and total chlorine – Part 2: Colorimetric method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes

Published By	Publication Date	Number of Pages
DIN	2019-03	28

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Categories: 13.060.50 - Examination of water for chemical substances, DIN

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Description

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.

Additional information

Published Code	DIN
Published By	Deutsches Institut für Normung
Publication Date	2019-03
Pages Count	28
Language	Germany
Descriptors	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, Potable water
File Size	1.2 MB
ICS Codes	13.060.50 - Examination of water for chemical substances

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DIN EN ISO 7393-2:2019 Edition

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