AS ISO 15661:2022 identically adopts ISO 15661:2020, which specifies an analytical method for the determination of total chlorine content using alkaline fusion and potentiometric titration
Table of contents
Header
About this publication
Preface
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
5.16
5.17
5.18
6 Apparatus
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
7 Instrument operating parameters
8 Sample
8.1 Laboratory sample
8.2 Test sample
9 Procedure
9.1 Number of blank testing
9.2 Number of determinations
9.3 Determination
9.3.1 General
9.3.2 Decomposition of the test portion by fusion with a mixture of carbonate salts
9.3.2.1 Decomposition
9.3.2.2 Dissolution of the test sample
9.3.3 Decomposition of the test portion by fusion with a mixture of potassium salts
9.3.3.1 Decomposition
9.3.3.2 Dissolution of the test sample
9.3.4 Oxidation of sulfide
9.3.5 Preparation of solution for titration
9.3.6 Potentiometric titration
9.3.6.1 Titration of blank tests
9.3.6.2 Titration of samples
10 Expression of results
11 Precision and accuracy
11.1 Expression of precision
11.2 Method for obtaining the final result
11.3 Precision between laboratories
11.4 Check of trueness
12 Test report
Annex A
A.1 Scope
A.2 Principle
A.3 Reagents
A.3.1
A.4 Apparatus
A.4.1
A.4.2
A.4.3
A.5 Procedure
A.5.1 Preparation of the weighing vessel
A.5.2 Test portion
A.5.3 Determination of the test portion dry mass
A.6 Calculation of the dry mass of the test portion
