ISO 21078-1:2008

Standard
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Norwegian title: Determination of boron (III) oxide in refractory products — Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes
English title: Determination of boron (III) oxide in refractory products — Part 1: Determination of total boron (III) oxide in oxidic materials for ceramics, glass and glazes
Item type: Standard
Language: Engelsk
Edition: 1 (2008-01-07)
Number of pages: 16
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Scope: <p>This part of <std><std-ref>ISO 21078</std-ref></std> 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.</p><p>The determination of boron(III) oxide is carried out using one of the following four methods:</p><list list-type="alpha-lower"><list-item><label>a)</label><p>alkaline titrimetry, which is applied to samples containing more than 0,5 % by mass of boron(III) oxide;</p></list-item><list-item><label>b)</label><p>azomethine H absorption spectrophotometry, which is applied to samples containing from 0,01 % by mass to 2,5 % by mass of boron(III) oxide;</p></list-item><list-item><label>c)</label><p>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;</p></list-item><list-item><label>d)</label><p>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.</p></list-item></list><non-normative-note><label>NOTE 1</label><p>The method can be extended to 30 % boron(III) oxide using modified oxidic fluxes.</p></non-normative-note><non-normative-note><label>NOTE 2</label><p>Interlaboratory test results for this part of <std><std-ref>ISO 21078</std-ref></std> are given in <xref ref-type="app" rid="sec_A">Annex A</xref>.</p></non-normative-note>
Adopted: 2008-01-07
ICS: 81.040.01 - Glass generelt
81.060.01 - Keramikk generelt