GB/T 223.58-1987: Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content

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Scope

The sample is dissolved in acid; in the sulfuric acid and phosphoric acid
medium, the silver nitrate is used as catalyst AND the ammonium persulfate is
used to oxidize the manganese to septivalence, AND the sodium
arsenite-sodium nitrite standard solution is used for titration. Test solution
containing cobalt more than 5 mg will affect the observation of end point, AND
it may add nickel to offset the effect of the color of the cobalt ion.

Basic Data

Standard ID	GB/T 223.58-1987 (GB/T223.58-1987)
Description (Translated English)	Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H11
Classification of International Standard	77.08
Word Count Estimation	5,574
Date of Issue	5/12/1987
Date of Implementation	3/1/1988
Older Standard (superseded by this standard)	GB 223.4-1981
Issuing agency(ies)	Ministry of Metallurgical Industry
Summary	This standard applies to iron, carbon steel, alloy steel, and the amount of iron in the determination of manganese. Measuring range: 0. 10 to 2. 50%.