I.S. EN 1622:2006

Foreword
Introduction
1 Scope
2 Normative references
3 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.2.1 Preparation of reagent
          A.2.2 Procedure
      A.3 Dechlorination by addition of ascorbic acid
          A.3.1 Preparation of reagent
          A.3.2 Procedure
Annex B (normative) Forced choice test method
      B.1 General
      B.2 Determination of TON and TFN
      B.3 Expression of results
          B.3.1 The short method
          B.3.2 The full method
          B.3.3 Test report
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

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