BS EN ISO 21078-1:2008
Determination of boron (III) oxide in refractory products -Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes

Standard No.

BS EN ISO 21078-1:2008

Release Date

2008

Published By

British Standards Institution (BSI)

Latest

BS EN ISO 21078-1:2008

Replace

BS 1902-2.3 Addendum No. 1:1976 06/30127629 DC:2006

Scope

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. NOTE 1 The method can be extended to 30 % boron(III) oxide using modified oxidic fluxes. NOTE 2 Interlaboratory test results for this part of ISO 21078 are given in Annex A.

BS EN ISO 21078-1:2008 Referenced Document

• ISO 31-0 Quantities and units - Part 0: General principles; Amendment 2
• ISO 3310-1 Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth*， 2016-08-01 Update
• ISO 3696 Water for analytical laboratory use; Specification and test methods
• ISO 6353-2 Reagents for chemical analysis — Part 2: Specifications — First series — Addendum 2
• ISO 6353-3 Reagents for chemical analysis; Part 3 : Specifications; Second series
• ISO 836 Terminology for refractories

BS EN ISO 21078-1:2008 history

• 2008 BS EN ISO 21078-1:2008 Determination of boron (III) oxide in refractory products -Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes
• 1976 BS 1902-2.3 Addendum No. 1:1976 Methods of testing refractory materials - Chemical analysis (wet methods) - Determination of boron in magnesites

BS EN ISO 21078-1:2008 Determination of boron (III) oxide in refractory products -Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes has been changed from BS 1902-2.3 Addendum No. 1:1976 Methods of testing refractory materials - Chemical analysis (wet methods) - Determination of boron in magnesites.