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Standard ČSN 651048 25.4.1991 preview

ČSN 651048 (651048)

Chemical analysis of aluminum oxide. Determination of phosphoric pentoxide content



STANDARD published on 25.4.1991


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The information about the standard:

Designation standards: ČSN 651048
Classification mark: 651048
Catalog number: 29944
Publication date standards: 25.4.1991
SKU: NS-132084
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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The category - similar standards:

OxidesMaterials for aluminium production

Annotation of standard text ČSN 651048 (651048):

Norma platí pro oxid hlinitý používaný především pro výrobu hliníku a určuje pro stanovení oxidu fosforečného při hmotnostním zlomku od 0,0004 do 0,01 % metodou fotometrickou. V této normě jsou zapracovány údaje z ISO 2829:1973. Při zavádění rozboru musí být dodržena veškerá ustanovení podle ČSN 65 1041. Metoda je založena na rozkladu vzorku tavením, tvorbě fosfomolybdenové heteropolykyseliny v kyselém prostředí, její redukci na MO modř kyselinou askorbovou v přítomnosti vínanu antimonylodraselného a změření absorbance roztoku při vlnové délce 720 nm. ČSN 65 1048 byla schválena 25.4.1991 a nabyla účinnosti od 1.1.1992. Nahradila ČSN 65 1048 z 31.5.1978

Similar standards:

ČSN 651047ČSN 651047

25.4.1991

ČSN 651049ČSN 651049

25.4.1991

ČSN 651052ČSN 651052

25.4.1991

ČSN 651053ČSN 651053

25.4.1991

ČSN 651054ČSN 651054

29.4.1991

ČSN 651055ČSN 651055

29.4.1991

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