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BS EN 1622:2006

Current

Current

The latest, up-to-date edition.

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

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-09-2006

€217.36
Excluding VAT

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Hazards
6 Test environment
7 Apparatus and reagents
8 Sampling and sample preservation
9 Test panel and selected assessors
10 Procedure for unforced choice
   10.1 General
   10.2 Type of test
        10.2.1 The triangle test
        10.2.2 The paired test
   10.3 Type of method
        10.3.1 Short method
        10.3.2 Full method
11 Expression of results
   11.1 The short method
   11.2 The full method
12 Test report
Annex A (normative) Chlorinated water
A.1 General
A.2 Dechlorination by addition of sodium thiosulfate
A.3 Dechlorination by addition of ascorbic acid
Annex B (normative) Forced choice test method
B.1 General
B.2 Determination of TON and TFN
B.3 Expression of results
Annex C (normative) Qualitative simplified procedure
Annex D (informative) Method for the preparation of
                      reference water
D.1 Apparatus and reagents
D.2 Procedure
Annex E (informative) Selection of the test panel
E.1 General
E.2 Self-evaluation
E.3 Screening test
Annex F (informative) Preparation of dilutions
Annex G (informative) Interlaboratory test by forced
                      choice methodology
Bibliography

Provides quantitative methods for determining the TON and TFN of waters and also a qualitative method for determining any abnormal odour and/or flavour.

Committee
EH/3/2
DevelopmentNote
Supersedes 94/506274 DC. (09/2005) Supersedes 04/30081891 DC (10/2006)
DocumentType
Standard
Pages
30
PublisherName
British Standards Institution
Status
Current
Supersedes

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 ….)

Standards Relationship
UNE-EN 1622:2007 Identical
NEN EN 1622 : 2006 Identical
EN 1622:2006 Identical
SN EN 1622 : 2006 Identical
I.S. EN 1622:2006 Identical
UNI EN 1622 : 2006 Identical
NS EN 1622 : 2ED 2006 Identical
NBN EN 1622 : 2006 Identical
DIN EN 1622:2006-10 Identical
NF EN 1622 : 2006 Identical

ISO 3591:1977 Sensory analysis — Apparatus — Wine-tasting glass
ISO 7393-2:1985 Water quality Determination of free chlorine and total chlorine Part 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
ISO 8589:2007 Sensory analysis — General guidance for the design of test rooms
ISO 5492:2008 Sensory analysis — Vocabulary

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