Chemical analysis of steel-making slag. Determination of manganese (II) oxide content in samples free of fluorine

The information about the standard:

Designation standards: STN 722041-7
Classification mark: 722041
Catalog number: 68335
Publication date standards: 1.8.1992
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Slovak technical standard
Kategorie: Technische Normen STN

Annotation of standard text STN 722041-7 (722041):

Tato norma urcuje spektrofotometrickou metodou pro stanoveni oxidu manganateho. Z alikvotniho podilu zasobniho roztoku po oddeleni kyseliny kremicite a chromu se vytesni kyselina chlorovodikova odparenim s kyselinou dusicnou a sirovou. Pak se oxiduji manganate soli jodistanem draselnym na manganistan a intenzita zbarveni roztoku se meri spektrofotometricky pri vlnove delce 525 nm. Vliv pritomnosti zelezitych soli se odstrani stisnenim kyselinou orthofosforecnou.