ISO 9556:2025(en)
Foreword ....................................................................................................................................................................................................................................................iv
1 Scope ............................................................................................................................................................................................................................................. 1
2 Normative references ................................................................................................................................................................................................. 1
3 Termsanddefinitions ................................................................................................................................................................................................ 1
4 Principle ........................................................................................................................................... ......................................................................................... 1
5 Reagents .................................................................................................................................................................................................................................... 1
6 Apparatus ................................................................................................................................................................................................................................ 2
7 Sampling and sample preparation ................................................................................................................................................................ 3
8 Procedure ................................................................................................................................................................................................................................ 3
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9 Expression of results ................................................................................................................................................................................................... 7
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10 Test report .............................................................................................................................................................................................................................. 8
Annex A Additional information on the international precision tests................................................ 9
Annex B Graphical representation of precision data .......................................................................................... 11
Annex C Features of commercial high-frequency induction furnaces and infrared
carbon analysers ...........................................................................................................................................................................................................12
Bibliography ......................................................................................................................................................................................................................................... 14
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