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Standard ČSN ISO 4298 1.12.1992 preview

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ČSN ISO 4298 (441575)

Manganese ores and concentrates. Determination of manganese content - Potentiometric method



STANDARD published on 1.12.1992


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The information about the standard:

Designation standards: ČSN ISO 4298
Classification mark: 441575
Catalog number: 28243
Publication date standards: 1.12.1992
SKU: NS-179079
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Metalliferous minerals

Annotation of standard text ČSN ISO 4298 (441575):

Norma obsahuje ISO 4298:1984. Tato mezinárodní norma určuje potenciometrickou metodu pro stanovení manganu v manganových rudách a koncentrátech s obsahem manganu od 15 % (m/m). Tato norma se používá společně s ČSN ISO 4297 - Manganové rudy a koncentráty. Metody chemického rozboru. Všeobecná ustanovení. Podstata metody: Vzorek se rozloží kyselinami chlorovodíkovou, dusičnou, chloristou a fluorovodíkovou. Nerozpustný zbytek se odfiltruje a hlavní roztok se uchová. Zbytek po vyžíhání se vytaví s uhličitanem sodným, tavenina se vylouží v kyselině chlorovodíkové a roztok se spojí s hlavním roztokem. Alikvotní část výsledného roztoku se přidá k roztoku difosforečnanu sodného, pH se upraví na hodnotu 7,0 a titruje se odměrným roztokem manganistanu draselného za potenciometrické kontroly. Postup při provádění normalizované zkoušky je podrobně popsán. ČSN ISO 4298 (44 1575) byla vydána v listopadu 1992. Nahradila ČSN 44 1826 z 20.4.1976 v celém rozsahu

Preview of the standard ČSN ISO 4298 (441575)

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