NF EN ISO 8467
NF EN ISO 8467

NF EN ISO 8467

July 1995
Standard Current

Water quality - Determination of permanganate index

The principle of the method specified is heating a sample in a boiling water-bath with a known amount of potassium permanganate und sulfuric acid for a fixed period time (10 min), reducing part of the permanganate by oxidizable material in the sample and determining the consumed permanganate by addition of an excess of oxalate solution, followed by titration with permanganate. Applies to waters having a cloride ion concentration of less than 300 mg/l. Samples having a permanganate index over 10 mg/l should be diluted before analysis. The lower limit of the optimum range of the test is 0,5 mg/l.

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National standards and national normative documents

Publication date

July 1995

Number of pages

9 p.

Reference

NF EN ISO 8467

ICS Codes

13.060.50   Examination of water for chemical substances

Classification index

T90-050

Print number

1 - août 1995

International kinship

ISO 8467:1993

European kinship

EN ISO 8467:1995
Sumary
Water quality - Determination of permanganate index

The principle of the method specified is heating a sample in a boiling water-bath with a known amount of potassium permanganate und sulfuric acid for a fixed period time (10 min), reducing part of the permanganate by oxidizable material in the sample and determining the consumed permanganate by addition of an excess of oxalate solution, followed by titration with permanganate. Applies to waters having a cloride ion concentration of less than 300 mg/l. Samples having a permanganate index over 10 mg/l should be diluted before analysis. The lower limit of the optimum range of the test is 0,5 mg/l.

Replaced standards (1)
NF T90-050
NF T90-050
October 1989
Standard Cancelled
Testing water. Detection of oxydability by potassium permanganate (permanganate index). Acid medium method under hot conditions.

La présente norme s'adresse aux laboratoires ayant à déterminer l'oxydabilité au permanganate de potassium d'échantillons d'eau. Elle est susceptible de servir de base de référence dans la réglementation française relative à la qualité des eaux, en particulier celles destinées à la consommation humaine.

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