ISO 23201:2015
Aluminium oxide primarily used for production of aluminium — Determination of trace elements — Wavelength dispersive X-ray fluorescence spectrometric method
ISO 23201:2015 sets out a wavelength dispersive X-ray fluorescence spectrometric method for the analysis of aluminium oxide for trace amounts of any or all of the following elements: sodium, silicon, iron, calcium, titanium, phosphorus, vanadium, zinc, manganese, gallium, potassium, copper, chromium and nickel. These elements are expressed as the oxides Na2O, SiO2, Fe2O3, CaO, TiO2, P2O5, V2O5, ZnO, MnO, Ga2O3, K2O, CuO, Cr2O3, and NiO on an un-dried sample basis. The method is applicable to smelting-grade aluminium oxide. The concentration range covered for each of the components is also given.
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Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Sampling and samples
7 Procedure
7.1 General
7.2 Preparation of calibration specimens
7.2.1 Determination of loss of mass on fusion of flux and flux correction
7.2.2 Preparation of intermediate calibration glass (ICG)
7.2.3 Preparation of the synthetic calibration disk (SCD)
7.2.4 Preparation of the blank calibration discs
7.3 Preparation of the sample discs
7.4 X-ray fluorescence measurement
7.4.1 General instrumental conditions
7.4.2 Guidelines for instrument optimization
7.4.3 Sample loading
7.4.4 Monitor disc: correction for instrumental drift
7.4.5 Measurements for calibration
7.4.6 Measurement of test discs
8 Calculations
8.1 Calculation of net intensity
8.2 Comparison of duplicate measurements for the Al2O3 blanks and Synthetic Calibration Discs (SCDs)
8.2.1 SCDs criteria for the acceptability of duplicate measurements
8.2.2 Al2O3 blanks criteria for the acceptability of duplicate measurement
8.3 Drift correction of measured intensities
8.4 Calculation of the calibration parameters
9 Consistency checks and reporting results
10 Precision
11 Accuracy
12 Quality assurance and control
13 Test report
Annex A (informative) Contamination issues and care of platinum ware
Annex B (normative) Example of instrument optimization
Annex C (informative) Calculation of reagent masses for different sample/flux combinations and synthetic calibration discs when omitting some elements
Annex D (informative) Preparation of monitor disc
Annex E (informative) Interlaboratory test program analysis of NIST 699 and ASCRM 27 smelter grade alumina, certified reference materials
Annex F (informative) Comments on flux purity
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Sampling and samples
7 Procedure
7.1 General
7.2 Preparation of calibration specimens
7.2.1 Determination of loss of mass on fusion of flux and flux correction
7.2.2 Preparation of intermediate calibration glass (ICG)
7.2.3 Preparation of the synthetic calibration disk (SCD)
7.2.4 Preparation of the blank calibration discs
7.3 Preparation of the sample discs
7.4 X-ray fluorescence measurement
7.4.1 General instrumental conditions
7.4.2 Guidelines for instrument optimization
7.4.3 Sample loading
7.4.4 Monitor disc: correction for instrumental drift
7.4.5 Measurements for calibration
7.4.6 Measurement of test discs
8 Calculations
8.1 Calculation of net intensity
8.2 Comparison of duplicate measurements for the Al2O3 blanks and Synthetic Calibration Discs (SCDs)
8.2.1 SCDs criteria for the acceptability of duplicate measurements
8.2.2 Al2O3 blanks criteria for the acceptability of duplicate measurement
8.3 Drift correction of measured intensities
8.4 Calculation of the calibration parameters
9 Consistency checks and reporting results
10 Precision
11 Accuracy
12 Quality assurance and control
13 Test report
Annex A (informative) Contamination issues and care of platinum ware
Annex B (normative) Example of instrument optimization
Annex C (informative) Calculation of reagent masses for different sample/flux combinations and synthetic calibration discs when omitting some elements
Annex D (informative) Preparation of monitor disc
Annex E (informative) Interlaboratory test program analysis of NIST 699 and ASCRM 27 smelter grade alumina, certified reference materials
Annex F (informative) Comments on flux purity
Bibliography