ISO/TS 9516-2:2024
(Main)Iron ores — Determination of various elements by X-ray fluorescence spectrometry — Part 2: Single element calibration procedure
Iron ores — Determination of various elements by X-ray fluorescence spectrometry — Part 2: Single element calibration procedure
This document sets out a wavelength dispersive X-ray fluorescence procedure for the determination of various elements in iron ores. The method is applicable to iron ores regardless of mineralogical type.
Titre manque — Partie 2: Titre manque
General Information
Standards Content (Sample)
Technical
Specification
ISO/TS 9516-2
First edition
Iron ores — Determination
2024-05
of various elements by X-ray
fluorescence spectrometry —
Part 2:
Single element calibration
procedure
Reference number
© ISO 2024
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Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 4
7 Sampling and samples . . 5
7.1 Laboratory sample .5
7.2 Preparation of test samples .5
7.2.1 General .5
7.2.2 Method specified in ISO 2596 .5
7.2.3 Method specified in ISO 7764 .6
8 Procedure . 6
8.1 General .6
8.2 Number of determinations .7
8.3 Check analysis and blank test .7
8.4 Preparation of discs .7
8.4.1 Weighing .7
8.4.2 Mixing .8
8.4.3 Fusion .8
8.4.4 Casting .8
8.4.5 Visual inspection .8
8.4.6 Disc storage .8
8.4.7 Cleaning of platinum ware .9
8.4.8 Test discs .9
8.5 Measurement .9
8.5.1 General .9
8.5.2 Effect of errors or omissions .10
8.5.3 Analytical lines .11
8.5.4 XRF generator settings .11
8.5.5 Crystals .14
8.5.6 Line overlaps .14
8.5.7 Collimators .14
8.5.8 Pulse height settings .14
8.5.9 Counting time .14
8.5.10 Simultaneous instruments . 15
8.5.11 Sample holders . 15
8.5.12 Measurement sequence .16
8.6 Drift correction .16
8.6.1 Preparation of drift correction monitor discs .16
8.6.2 Drift correction using monitor disc .17
9 Calculation of results . 19
9.1 General .19
9.2 Calibration equation . 20
9.3 Calculation of alpha coefficient . 23
9.4 Correction for sample, flux and oxidizer mass .24
9.4.1 General .24
9.4.2 Correction of flux/sample mass ratio .24
9.4.3 Correction of remaining oxidizer/sample mass ratio .24
9.4.4 Mass ratio correction constant in calibration Equation 1 . 25
9.5 Calculation of calibration . 25
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9.5.1 Preparation of calibration discs . 25
9.5.2 Calculation of concentrations of calibration discs . 28
9.5.3 Measurement of calibration discs . 29
9.5.4 Calculation of calibration coefficients . 29
9.6 Calculation of concentrations . . 33
9.6.1 Calculation of flux/sample and remaining oxidizer/sample mass ratios . 33
9.6.2 Calculation of initial concentration . 34
9.6.3 Calculation of concentrations . 34
9.6.4 Conversion from oxide to element concentrations . 35
10 General treatment of results .35
10.1 Background equivalent concentration (BEC) . 35
10.2 Determination of analytical result . 36
10.3 Check for trueness . 36
10.4 Calculation of the final result .37
10.5 Oxide factors . . 38
11 Test report .38
Annex A (normative) Preparation of Flux A and Flux D .39
Annex B (normative) Preparation of Flux B and Flux C .
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