$Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) - Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry…$

Chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method) - Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry…

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This part of ISO 20565 specifies flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission spectrometry (ICP-AES) methods for the chemical analysis of chrome-bearing refractory products and chrome-bearing raw materials.

It is applicable in the ranges of determination given in Table 1.

ISO 20565 gives alternatives to the X-ray fluorescence (XRF) method given in ISO 12677.

Table 1 — Range of determination (% by mass)

Component	Range
SiO₂	0,5 to 10
Al₂O₃	2 to 30
Fe₂O₃	0,5 to 25
TiO₂	0,01 to 1
MnO	0,01 to 1
CaO	0,01 to 3
MgO	15 to 85
Na₂O	0,01 to 1
K₂O	0,01 to 1
Cr₂O₃	2 to 60
ZrO₂	0,01 to 0,5
P₂O₅	0,01 to 5
LOI	-0,5 to 5
NOTE These values are after the loss on ignition (LOI) has been taken into account.