Keyword Definition

In order to prevent atmospheric oxidation during chemical dissolution of the sample, ammonium metavanadate is added to the digestion mixture.  As soon as ferrous iron is released from the rock matrix, it reacts as follows:

Vv O2 + + Fe2+ + 2H+→ VivO2+ + H2O + Fe3+

The reduced form of vanadium (VivO2+) is stable to atmospheric oxidation.

[see Potts, P.J. (1987).  A handbook of silicate rock analysis. Page 68]

Hierarchical classification

Decomposition >> Aqueous dissolution >> Acid >> Strong Acid >> HF + … >> HF-NH4VO3



Category: Decomposition techniques

The different kinds of analytical decompositions have been classified hierarchically. Examples: “fusion”, “acid” Taken from the “Analytical_Decompositions_SHARED” database table.

Associated Analytical Suites:

IndexSuite IDSuite Name
1  629     ActLabs 4F-FeO – FeO by titration

Associated Analytical Packages:

IndexPackage IDPackage Name
1  296     ActLabs GSC TGI4 whole rock analysis (variant #1)
2  297     ActLabs GSC TGI4 whole rock analysis (variant #2)
3  299     ActLabs CO2 +FeO
4  313     ActLabs GSC TGI4 whole rock analysis (variant #4)
5  314     ActLabs GSC TGI4 whole rock analysis (variant #5)
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