ISO 14719-2011 PDF

Full title and description

ISO 14719:2011 — Chemical analysis of refractory material, glass and glazes — Determination of Fe2+ and Fe3+ by the spectral photometric method with 1,10‑phenanthroline. This International Standard specifies a spectral photometric procedure using 1,10‑phenanthroline for the quantitative determination of ferrous and ferric iron in oxidic raw and basic materials used in ceramics, glass and glazes (e.g., feldspar, kaolinites, clays, limestone, quartz refractory materials). The method can be extended to other aluminosilicate materials if appropriate uncertainty data are produced; it is not suitable for reduced materials such as silicon carbide or graphite‑magnesia.

Abstract

ISO 14719:2011 describes a spectral photometric method based on complexation of Fe2+ (and total Fe after appropriate treatment) with 1,10‑phenanthroline and subsequent measurement of absorbance to determine Fe2+ and Fe3+ concentrations. The standard covers sample decomposition, preparation, reagents, calibration, calculation of results and guidance on applicability and limitations (not suitable for reduced materials; possible decomposition difficulties for some high‑purity oxides).

General information

• Status: Published (International Standard; confirmed during periodic review).
• Publication date: 2011 (published 29 November 2011; ISO edition marked 2011‑12).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 81.080 (Refractories); 81.040.01 (Glass in general); 81.060.01 (Ceramics in general).
• Edition / version: Edition 1 (2011).
• Number of pages: 13 (ISO published version).

Scope

Specifies a spectral photometric method with 1,10‑phenanthroline for the quantitative determination of Fe2+ and Fe3+ in oxidic raw and basic materials used in the manufacture of ceramics, glass and glazes (examples: feldspar, kaolinites, clay, limestone, quartz refractory materials). The standard indicates possible extension to other aluminosilicate materials if uncertainty data support applicability, and it warns about limitations for some high‑purity oxides and for reduced materials.

Key topics and requirements

• Analytical principle: formation of a coloured complex between Fe2+ and 1,10‑phenanthroline and measurement by spectral photometry (absorbance measurement and calibration).
• Sample decomposition and preparation procedures appropriate for oxidic materials; notes on decomposition difficulties for certain high‑purity alumina and chrome ore samples.
• Reagents and solutions: preparation and quality requirements for 1,10‑phenanthroline reagent, reducing/oxidizing treatments when required, buffer solutions and calibration standards.
• Calibration, calculation and expression of results, including treatment of Fe2+/Fe3+ fractionation and reporting conventions.
• Limitations and applicability: not suitable for reduced materials (e.g., silicon carbide, graphite‑magnesia); extension to other materials requires uncertainty validation.

Typical use and users

Used by materials laboratories, quality control and production teams in the ceramics, glass and refractory industries, research laboratories analyzing raw materials and glaze formulations, and standards bodies/national laboratories performing comparative testing and method validation. Applicable to QC of incoming raw materials, R&D on compositions, and conformity testing where iron oxidation state affects product properties.

Related standards

Adopted as EN ISO / national variants in several markets (for example BS EN ISO 14719:2011, EVS‑EN ISO 14719:2011). Related standards address sampling and physical property measurement of refractories and ceramics (for example the ISO 1927 series on monolithic refractory products) and other analytical methods for iron and trace elements in inorganic materials. Users should consult national adoptions and companion ISO methods for complementary test procedures.

Keywords

Fe2+, Fe3+, iron speciation, 1,10‑phenanthroline, spectral photometry, photometric method, refractory materials, glass, glazes, ceramics, sample decomposition, aluminosilicates, quantitative analysis.

FAQ

Q: What is this standard?

A: ISO 14719:2011 is an international standard that specifies a spectral photometric method using 1,10‑phenanthroline to determine Fe2+ and Fe3+ in oxidic raw and basic materials for ceramics, glass and glazes.

Q: What does it cover?

A: It covers sample decomposition and preparation, reagent and calibration requirements, the photometric measurement procedure, calculation and reporting of Fe2+ and Fe3+ results, and notes on applicability and limitations (including materials for which the method is unsuitable).

Q: Who typically uses it?

A: Materials and QC laboratories in the glass, glaze, ceramic and refractory industries; R&D teams working on raw material composition and product formulation; standards bodies and testing laboratories performing method validation and interlaboratory comparisons.

Q: Is it current or superseded?

A: ISO 14719:2011 is the published edition from 2011. The ISO bibliographic record lists it as published and indicates confirmation during periodic review. Users should check national standards bodies for any later revisions or replacements adopted locally.

Q: Is it part of a series?

A: It is a standalone analytical method standard within the family of ISO standards related to glass, ceramics and refractories; several related ISO standards (and EN adoptions) cover sampling, physical properties and other analytical techniques for these materials. Consult national/adopted versions (EN ISO, BS EN, etc.) for regional implementations.

Q: What are the key keywords?

A: Fe2+, Fe3+, 1,10‑phenanthroline, spectral photometry, refractory materials, glass, glazes, ceramics, iron speciation, quantitative analysis.