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  • BSI
    20/30420126 DC BS ISO 4443. Cryolite primarily used for the production of aluminium. Determination of elements. Wavelength dispersive X-ray fluorescence spectrometric method using pressed powder tablets
    Edition: 2020
    $42.22
    / user per year

Description of 20/30420126 DC 2020

This document describes a wavelength dispersive X-ray fluorescence spectrometric (XRF) method for the determination of cryolite (Na3AlF6) from the content of fluorine to the content of trace elements. The calibration reference materials are not specified in this method.

The method is applicable to cryolite, which is primarily used for the production of aluminium, where the concentration range for each element is given in Table 1. Annex A provides conversion factors for conversing element to compound. The validity and precision of test results for concentrations outside these ranges has not been determined.

Table 1
Concentration range for elements in cryolite
Element Given as Concentration range
Mass%
Fluorine F 51,0 to 56,0
Aluminium Al 12,0 to 15,0
Sodium Na 27,0 to 33,0
Silicon SiO2 LLD to 0,40
Iron Fe2O3 LLD to 0,037
Sulfur SO4 LLD to 0,50
Phosphorus P2O5 LLD to 0,040
Calcium CaO LLD to 0,080


Standard Number20/30420126 DC
TitleBS ISO 4443. Cryolite primarily used for the production of aluminium. Determination of elements. Wavelength dispersive X-ray fluorescence spectrometric method using pressed powder tablets
StatusDefinitive
Publication Date2020-12-17
Identical National Standard OfISO/DIS 4443
DescriptorsCryolite, Production, Aluminium, X-rays, Fluorescence, Powder, Tablets
ICS71.100.10 Materials for aluminium production
CommitteeW/-
PublisherBSI
Pages16

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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