This standard specifies digestion methods for rendering aluminosilicate samples soluble. To take account of
the analytical methods specified in other parts of this series of standards and of the possible interferences
resulting from the digestion, the following two methods have been adopted.
Digestion method A
Digestion with hydrofluoric and sulfuric acids followed by alkaline fusion digestion to determine:
a) aluminium oxide, AI203, complexometrically as specified in DIN 51083-4;
b) titanium(IV) oxide, TiO2, photometrically as specified in DIN 51083-5;
c) calcium oxide, CaO, complexometrically as specified in DIN 51083-7 for a CaO content exceeding 10 %;
d) phosphorus(V) oxide, P205, photometrically as specified in DIN 51083-9.
Digestion method B
Digestion with hydrofluoric and sulfuric acids to determine:
a) iron(III) oxide, Fe203, by atomic absorption spectrometry (AAS) as specified in DIN 51083-6;
b) manganese(Il) oxide, MnO, by AAS as specified in DIN 51083-6;
c) calcium oxide, CaO, by AAS as specified in DIN 51083-7 for a CaO content of 10 % or less;
d) magnesium oxide, MgO, by AAS as specified in DIN 51083-8;
e) e) lithium oxide, Li20, sodium oxide, Na20, and potassium oxide, K20, by flame emission as specified in
DIN 51083-10.
NOTE The determination of SiO2, including digestion methods, is specified in DIN 51083-2.
DIN 51083-3:2004 history
2004DIN 51083-3:2004 Testing of ceramic materials - Chemical analysis of alumosilicates - Part 3: Decomposition methods
1970DIN 51083-3:1992 Testing of ceramic materials - Chemical analysis of alumosilicates - Part 3: Decomposition methods