Standard

NS-EN ISO 7393-1:2000

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Omfang

This part of ISO 7393 specifies a titrimetric method for the determination of free chlorine and total chlorine in water. Sea water and waters containing bromides and iodides comprise a group for which special procedures are required.[2] The method is applicable to concentrations, in terms of chlorine (Cl2), from 0,000 4 to 0,07 mmol/l (0,03 to 5 mg/l) total chlorine and at higher concentrations by dilution of samples. For concentrations above 0,07 mmol/l, ISO 7393/3 tan also be used. In annex A a procedure is presented for the differentiation of combined chlorine of the monochloramine type, combined chlorine of the dichloramine type and combined chlorine in the form of nitrogen trichloride. Several compounds influence the determination specified in Reaction with DPD in the presence of an excess of potassium this part of ISO 7393. Intetferences are noted in clauses 7 and 9.

Dokumentinformasjon

  • Standard fra SN
  • Publisert:
  • Utgave: 1
  • Versjon: 1
  • Varetype: NAT
  • ICS 13.060
  • ICS 13.060.01
  • National Committee SN/K 153

Referanser i lov

EU lov: 98/83/EC

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