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
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