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Norm

ÖNORM EN 1622

Issue date: 2006 11 01

Water quality - Determination of the threshold odour number (TON) and threshold flavour number (TFN)

This European Standard specifies quantitative methods for determining the TON and TFN of waters and also a qualitative method for determining any abnormal odour and/or f...
Valid
This European Standard specifies quantitative methods for determining the TON and TFN of waters and also a qualitative method for determining any abnormal odour and/or flavour. It is essential that the safety remarks in Clause 5 are taken into account. Two quantitative methods are described: a short method applicable when either a sample has no odour and flavour or when the odour and flavour are to be compared with a specified threshold number; a full method applicable when the threshold number for the sample is to be determined. For both quantitative methods, two different methodologies are described: unforced choice in the standard; forced choice in Annex B. Both methods are applicable for quantifying the odour and flavour of drinking water and/or migration waters from materials in contact with waters. NOTE The choice of the quantitative or qualitative method is depending on the national regulations, and on the type of water to be assessed (raw water, distribution water, migration water .)
ÖNORM EN 1622
2006 11 01
Water quality - Determination of the threshold odour number (TON) and threshold flavour number (TFN)...
Norm
ÖNORM EN 1622
1998 04 01
Water analysis - Determination of the threshold odour number (TON) and threshold flavour number (TFN...
Norm
Norm
ISO 7393-2:1985
Issue date : 1985 10 24
Water quality — Determination of free chlorine and total chlorine — Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
Norm
ISO 7393-2:2017
Issue date : 2017 12 13
Water quality — Determination of free chlorine and total chlorine — Part 2: Colorimetric method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes