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BS EN ISO 12677:2011:2014 Edition

BS EN ISO 12677:2011:2014 Edition

$215.11

Chemical analysis of refractory products by X-ray fluorescence (XRF) – Fused cast-bead method

Published By Publication Date Number of Pages
BSI 2014 86
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This International Standard specifies a method for the chemical analysis of refractory and technical ceramic raw materials, intermediates and products, by means of the X-ray fluorescence (XRF) fused cast-bead method. Typical materials that can be analysed by this standard are given in Clause 3. This International Standard is not applicable to non-oxide materials, such as silicon carbides or nitrides, etc. The method is applicable to a wide range of materials containing a wide range of elements.

NOTE 1 The presence of significant amounts of certain elements, such as tin, copper, zinc and chromium, can present difficulties in the fusion process. In this case, the Bibliography can be referred to.

NOTE 2 Constituents at concentrations greater than 99 % (on a dried basis) are reported by difference, provided that all likely minor constituents and any loss on ignition have been determined. These figures can also be checked by direct determination.

PDF Catalog

PDF Pages PDF Title
9 1 Scope
2 Normative references
3 Types of material
10 4 Principle
5 Apparatus
11 6 Sample grinding
12 7 Loss on ignition (and/or drying)
8 Flux
8.1 Choice of flux and ratio of flux to sample
13 8.2 Compensations for moisture in flux
9 Fusion casting procedures
9.1 Fusion of samples and casting of beads
9.1.1 Choice of procedure
9.1.2 Requirements
14 9.1.3 Conversion of the sample to bead form
9.1.4 Manual casting of beads
9.1.4.1 General
15 9.1.4.2 Cooling of beads
9.2 Automatic bead preparation
9.3 Storage
16 9.4 Special problems
10 Calibration
10.1 Calibration standards
10.2 Reagents and series reference materials (SeRMs)
10.2.1 Purity and preparation of reagents
17 10.2.2 Preparation of series reference materials (SeRMs)
18 10.3 Calibration using reagents
10.3.1 Calibration standards
10.3.2 Method of calibration using binary and ternary standards
10.3.2.1 General
10.3.2.2 Definition of matrix
19 10.3.2.3 Drift correction
10.3.2.4 Calibration standards
10.3.2.5 Calculation of calibration coefficients
20 10.3.2.6 Line-overlap correction standards
10.3.2.7 Line-overlap corrections
10.3.2.8 Mass-absorption correction standards
21 10.3.2.9 Model for mass-absorption correction coefficients
10.3.2.10 Calculation of mass-absorption correction coefficients
22 10.3.2.11 Criteria for determination of theoretical mass-absorption correction coefficients
10.3.3 Multi-element calibration
23 10.3.4 Calibration ranges
10.4 Calibration using SeRMs
10.4.1 Calibration standards
24 10.4.2 Calibration curve and equation
10.4.2.1 Preparation of calibration curve
10.4.2.2 Preparation of calibration equation
25 11 Corrections
11.1 Line-overlap correction
11.2 Background correction
26 11.3 Drift correction
11.4 Calculation of results
27 11.5 Software requirements
28 12 Reproducibility and repeatability
12.1 Fusion tests
12.2 Frequency of instrument tests
12.3 Maximum allowance differences of sample holders
29 12.4 Sample measuring positions
12.5 Instrument repeatability
12.6 Sequential systems
30 12.7 Dead time
12.8 Other tests
12.9 Flow gas
13 Accuracy determined by certified reference materials
13.1 Validation of synthetic calibrations
13.2 Validation of SeRM calibrations
13.3 Fresh beads of the CRMs or synthetic standards used to check SeRM calibrations
31 14 Definitions of limits of detection
15 Test report

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BS EN ISO 12677:2011
$215.11