Browsing Artikler by Author "Graff, Per Reidar"
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A contribution to the analytical chemistry of silicate rocks: a scheme of analysis for eleven main constituents based on decomposition by hydrofluoric acid.
Langmyhr, F.J.; Graff, Per Reidar (NGU (230), Journal article, 1965) -
A turbidimetric method for the determination of small amounts of sulphur in limestone and dolomite.
Graff, Per Reidar (NGU (270), Journal article, 1971)It has been observed thaat on applying the combustion method to the determination of small amounts of sulphur in limestone and dolomite the bulk of sulphur may remain in the sample when no oxygen stream is used, and that ... -
Change in chemical composition of rock samples during preparation for analysis.
Graff, Per Reidar (NGU (300), Journal article, 1973)It has been shown that up to 3% of the volume of rock samples may escape as clust during their preparation (crushing and grinding) for chemical analysis. The mineral and chemical composition of the escaping rock dust may ...