International Standard
ISO 10702:1993
Steel and iron — Determination of nitrogen content — Titrimetric method after distillation
Reference number
ISO 10702:1993
ISO 10702:1993
Edición 1
1993-07
1993-07
© ISO 2024
International Standard
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ISO 10702:1993
18791
No disponible en español
Publicado
(Edición 1, 1993)
Esta norma se revisó y confirmó por última vez en 2023.
Por lo tanto, esta versión es la actual.
Resumen
The principle of the method specified is dissolving a test portion in hydrochloric acid followed by oxidation with hydrogen peroxide, fuming of the acid-insoluble residue in sulfuric acid with potassium sulfate and copper(II) sulfate, distilling the solution made alkaline with sodium hydroxide, collecting ammonia in a receiver containing orthoboric acid solution, titration of the ammonium ion with amidosulfuric acid. Is applicable to nitrogen contents from 0,002 % (m/m) to 0,5 % (m/m); does not apply to samples containing silicon nitride.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1993-07Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 9
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Comité Técnico :ISO/TC 17/SC 1ICS :77.080.01
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