Norm

NEN-EN-ISO 21078-1:2008 en

Bepaling van het gehalte aan borium (III) oxide in vuurvaste producten - Deel 1: Bepaling van het totale gehalte aan borium oxide in oxideerbare materialen voor keramiek, glas en glazuur

  • Deze norm is ingetrokken sinds 14-05-2008

79,70

Over deze norm

Status Ingetrokken
Aantal pagina's 16
Commissie Vuurvaste materialen
Gepubliceerd op 01-01-2008
Taal Engels
This part of ISO 21078 specifies methods of determining boron(III) oxide in refractory products and raw materials, in mass fractions of 0,01 % or greater. It is applicable to the determination of total boron(III) oxide in oxidic materials for ceramics, glass and glazes. The determination of boron(III) oxide is carried out using one of the following four methods: a) alkaline titrimetry, which is applied to samples containing more than 0,5 % by mass of boron(III) oxide; b) azomethine H absorption spectrophotometry, which is applied to samples containing from 0,01 % by mass to 2,5 % by mass of boron(III) oxide; c) curcumin absorption spectrophotometry (rothocyanine method), which is applied to samples containing from 0,01 % by mass to 1,0 % by mass of boron(III) oxide; d) inductively coupled plasma atomic emission spectrometry (ICP-AES), which is applied to samples containing from 0,01 % by mass to 15 % by mass of boron(III) oxide.

Details

ICS-code 81.040.01
81.060.01
Nederlandse titel Bepaling van het gehalte aan borium (III) oxide in vuurvaste producten - Deel 1: Bepaling van het totale gehalte aan borium oxide in oxideerbare materialen voor keramiek, glas en glazuur
Engelse titel Determination of boron(III) oxide in refractory products - Part 1: Determination of total boric oxide in oxidic materials for ceramics, glass and glazes
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