DS/EN 1622:2006

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


Status:
Current
Type:
Standard
Language:
EN
Price from:
€ 67.90

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.
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...)


Number of pages: 32

Published: 2006-10-27

Date of approval: 2006-09-25

International relationships:

ICS: 13.060.60 - Examination of physical properties of water 67.240 - Sensory analysis

Item number: M201772


Committees

Committee

  • CEN/TC 230

Danish committee

DS/S-471