714471

ISO 10702:1993

Steel and iron - Determination of nitrogen content - Titrimetric method after distillation

standard by International Organization for Standardization , 07/01/1993

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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.

 

Product Details

Published:
07/01/1993
Number of Pages:
9
File Size:
1 file , 650 KB
Note:
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