SIST EN ISO 21078-1:2008 PDF

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

Название (английский):

SIST EN ISO 21078-1:2008

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

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 23
Дата публикации:: 4 апреля 2008 г.
ICS:: 81.080
Технический комитет:: IKER - Ceramics

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Описание (английский):

ISO 21078-1:2008 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(111) oxide in oxidic materials for ceramics, glass and glazes.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 21078-1:2008 - Determination of boron(III) oxide in refractory products (Part 1) specifies validated laboratory methods for measuring total boron(III) oxide (boric oxide) in oxidic materials used for ceramics, glass and glazes. The standard applies to mass fractions of 0.01 % or greater and was prepared by ISO/TC 33 in collaboration with CEN/TC 187. It defines sample preparation, four analytical procedures, and rules for expression and reporting of results.

Key topics and technical requirements

Applicable range and methods

Alkaline titrimetry - suitable for samples with > 0.5 % B2O3 (fusion and titration; mannitol method with pH end points described in the standard).
Azomethine H spectrophotometry - for 0.01 % to 2.5 % B2O3.
Curcumin (rothocyanine) spectrophotometry - for 0.01 % to 1.0 % B2O3.
ICP-AES (inductively coupled plasma atomic emission spectrometry) - for 0.01 % to 15 % B2O3 (extendable to ~30 % with modified fluxes).

Sample preparation

Sampling and reduction procedures for bricks and unshaped refractories (crush to pass 6.7 mm, then grind to 300 µm; laboratory test sample to 106 µm).
Drying requirements for wet samples (air-bath/oven at 110 °C ± 5 °C, minimum drying times given).
Test portion weighing to nearest 0.1 mg; duplicate determinations and reagent blank corrections required.

Quality control

Simultaneous duplicate determinations and blank tests.
Annex A provides interlaboratory test results (informative) to support method performance.

Reagents and apparatus

Lists of required reagents (e.g., sodium hydroxide, mannitol) and apparatus (muffle furnace, pH meter, ICP-AES) are specified.

Applications and users

Who uses it

Quality control and analytical laboratories in refractory, ceramics, glass and glaze industries.
Raw-material suppliers, R&D groups, compliance testing bodies and failure-analysis labs.

Practical uses

Routine compositional testing to control boron content in raw materials and finished refractory products.
Compliance verification, product specification, process control and formulation development where boron content affects melting, viscosity or refractory properties.

Related standards

ISO 21078-2 (acid extraction method for binders) - companion part.

Normative references cited in EN ISO 21078-1:2008: ISO 31-0, ISO 836, ISO 3310-1, ISO 3696, ISO 6353-2, ISO 6353-3.

This standard is essential for accurate, reproducible measurement of boric oxide in oxidic refractory materials and supports regulatory and quality requirements in ceramics and glass manufacturing.

SIST EN ISO 21078-1:2008 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

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