Reference number
ISO 10702:1993
International Standard
ISO 10702:1993
Steel and iron — Determination of nitrogen content — Titrimetric method after distillation
Edition 1
1993-07
Read sample
ISO 10702:1993
18791
Published (Edition 1, 1993)
This publication was last reviewed and confirmed in 2023. Therefore this version remains current.

ISO 10702:1993

ISO 10702:1993
18791
Language
Format
CHF 63
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Abstract

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.

General information

  •  : Published
     : 1993-07
    : International Standard confirmed [90.93]
  •  : 1
     : 9
  • ISO/TC 17/SC 1
    77.080.01 
  • RSS updates

Life cycle

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