Norm

ISO/DIS 7393-2:2017 en

Water - Bepaling van het vrije chloorgehalte en het totale chloorgehalte - Deel 2: Colorimetrische methode met gebruik van N,N-diethyl-1,4-phenylenediamine, voor routine controledoeleinden

  • Deze norm is niet direct leverbaar vanuit de NEN-shop.
    Wilt u dit product bestellen neemt u dan contact op met NEN-klantenservice: (015) 2 690 391 of klantenservice@nen.nl

Over deze norm

Status Ontwerp
Aantal pagina's 16
Commissie Anorganische parameters
Gepubliceerd op 27-01-2017
Taal Engels
ScopeThis 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 (Cl2), 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.Commonly, the method is applied as a field method with mobile photometers and commercially available ready-for-use reagents (liquid reagents, powders and pellets). It is essential that those reagents fully comply with minimum requirements and contain the essential reagents and a buffer system suitable to adjust the measurement solution to a pH range of 6,2 to 6,5. If there is doubt that water samples have uncommon pH values and/or buffer capacities the user has to check and if necessary to adjust the sample pH to the required range. The pH of the sample shall be within the range of pH 4 and 8. Adjust, if necessary, with sodium hydroxide solution or sulfuric acid before the test.

Details

ICS-code 13.060.50
Nederlandse titel Water - Bepaling van het vrije chloorgehalte en het totale chloorgehalte - Deel 2: Colorimetrische methode met gebruik van N,N-diethyl-1,4-phenylenediamine, voor routine controledoeleinden
Engelse titel Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
Vervangt

Winkelwagen

Subtotaal:

Ga naar winkelwagen