DS/EN 1622:2006
Water quality – Determination of the threshold odour number (TON) and threshold flavour number (TFN)

Standard No.

DS/EN 1622:2006

Release Date

2006

Published By

Danish Standards Foundation

Latest

DS/EN 1622:2006

Replace

DS/EN 1622-1998

Scope

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

DS/EN 1622:2006 history

• 2006 DS/EN 1622:2006 Water quality – Determination of the threshold odour number (TON) and threshold flavour number (TFN)