BS EN 1622:2006
Current
The latest, up-to-date edition.
Water quality. Determination of the threshold odour number (TON) and threshold flavour number (TFN)
Hardcopy , PDF
English
29-09-2006
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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