ISO 10702:1993

Published (Edition 1, 1993)

This publication was last reviewed and confirmed in 2023. Therefore this version remains current.

ISO 10702:1993

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

Status
: Published

Publication date
: 1993-07

Stage
: International Standard confirmed [90.93]
Edition
: 1

Number of pages
: 9
Technical Committee :
ISO/TC 17/SC 1

ICS :
77.080.01
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