ČSN 441767 (441767)

Lead concentrates. Photometric determination of germanium content



STANDARD published on 14.3.1988


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The information about the standard:

Designation standards: ČSN 441767
Classification mark: 441767
Catalog number: 28383
Publication date standards: 14.3.1988
SKU: NS-128857
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

The category - similar standards:

Metalliferous minerals

Annotation of standard text ČSN 441767 (441767):

Norma platí pro chemický rozbor olověných koncentrátů a určuje stanovení germania metodou fotometrickou. Podstata metody: Po kyselinovém rozkladu vzorku se germanium oddělí destilací z azeotropické směsi kyseliny chlorovodíkové a stanoví fotometricky fenylfluoronem. Postup při provádění normalizované zkoušky je podrobně popsán. ČSN 44 1767 byla schválena 14.3.1988 a nabyla účinnosti od 1.5.1989. Nahradila ČSN 44 1656 z 23.7.1969 v části II oddíl N a spolu s ČSN 44 1701, ČSN 44 1760 až ČSN 44 1766, a ČSN 44 1769 až ČSN 44 1778 ji nahradila v celém rozsahu

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