Codes & Standards - Purchase
ISO 10702:1993
Steel and iron -- Determination of nitrogen content -- Titrimetric method after distillation
SKU: iso_018791_108840
Published by ISO
Publication Year 1993
1 Edition
9 pages
Product Details
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.