GB/T 40915-2021Determination of SiO2，Al2O3，Fe2O3，K2O，Na2O，CaO，MgO content of soda-lime-silica glass by X-ray fluorescence spectrometric method (English PDF)
X射线荧光光谱法测定钠钙硅玻璃中SiO2、Al2O3、Fe2O3、K2O、Na2O、CaO、MgO含量
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
November 26, 2021
Implementation date
June 1, 2022
Scope
GB/T 40915-2021 is the English-translated version of X射线荧光光谱法测定钠钙硅玻璃中SiO2、Al2O3、Fe2O3、K2O、Na2O、CaO、MgO含量.
GB/T 40915-2021 is a Chinese national method for measuring the main oxides of soda-lime-silica glass by X-ray fluorescence spectrometry. It covers the content of SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO and MgO.
Samples are prepared either by fusion with a flux into a glass bead or by pressing into a tablet, and the fluorescence intensity of each element is compared with a calibration curve drawn from standard samples of known composition, with a drift correction sample used to correct instrument drift.
The standard defines these terms and sets out the principle of the method. It gives glass producers and testing laboratories a single instrumental method for all seven oxides. It was issued on 26 November 2021 and has applied since 1 June 2022.
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Document preview — GB/T 40915-2021
National Standard of the People's Republic of China
- ICS
- 81.040.01
- Classification
- Y 22
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
1 Scope
This document describes the X-ray fluorescence spectra of SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO, MgO content in soda lime silica glass test methods.
This document is applicable to the determination of SiO2, Al2O3, Fe2O3, K2O, Na2O, CaO, MgO content in soda lime silica glass.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 6005 Test sieve basic size of woven wire mesh, perforated plate and electroformed sheet
GB/T 8170 Numerical rounding rules and the expression and determination of limit values
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Melting method
A sample preparation method in which the sample is mixed with a certain proportion of mixed flux and an appropriate amount of release agent, and melted at a certain temperature to form a glass sample.
3.2 Tabletting method
The sample is prepared with a boric acid edging substrate, or fixed with a plastic ring, etc., and pressed into a sample in a sample press.
3.3 Standard sample
A set of samples with a known composition and content and a certain gradient used to draw the working curve, and the chemical composition and physical properties of the sample to be tested Consistent with other aspects. The composition content of the standard sample can cover the content range of quantitative analysis. [Source: GB/T 30905-2014, 3.4, with modification]
3.4 Drift correction sample
The sample used to correct the X-ray intensity drift of the instrument requires that its elemental analysis line has appropriate intensity and can be stable for a long time. [Source: GB/T 30905-2014, 3.3, with modification]
4 Principle
The sample made by the melting method or the tableting method, through the X-ray tube to generate primary X-rays and irradiate the surface of the sample, resulting in the characteristics After the X-ray is split by the crystal, the detector measures the X-ray fluorescence intensity at the 2theta angle corresponding to the selected characteristic wavelength, according to the calibration curve
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 6005-1997 — Test sieves--Metal wire cloth, perforated metal plate and electroformed sheet--Nominal sizes of opening
GB/T 6005-2008 — Test sieves -- Metal wire cloth, perforated metal plate and electroformed sheet -- Nominal sizes of openings
GB/T 8170-1987 — Rules for rounding off of numerical values
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