Petrological analyses

Whole rock analysis

Whole rock analyses are carried out using high precision methods applying state-of–the-art instrumentation (XRF, ICP-OES, ICP-MS).

Major, minor and many trace elements are determined by XRF. Determinations are made on pressed powder pellets (Method 175X). The XRF analysis can be supplemented by determination of the rare earth elements (Method 307M, package B) and other trace elements by ICP-MS and/or ICP-OES after the total digestion of the sample (package A). PGE at low concentration levels (Method 714M) can be included for petrological studies.

Carbon (Method 811L) and loss on ignition (Method 813G) are recommended for complete whole rock analysis. Individual determinations, which are often required in whole rock analysis, such as iron (II), fluoride, H2O+ and H2O-, are also available.

The XRF method is applicable to rocks and soil samples, such as sand, gravel, till and sediments. Technical products and ash of similar composition can also be analysed. The prerequisite for applicability of the XRF method is that the chemical composition of the sample remains unchanged during the fine grinding (< 10 m) as the pressed powder pellet is prepared. Samples containing > 20 % S cannot be analysed by this method.