Digestions

Acid digestions allow complete or partial decomposition of pulverized solid samples (rock, ore, soil, dust filters, plants, materials, etc.). The type of digestion is specifically adapted to the elements to be analyzed and the sample matrix.

Among others, we offer (1) open and semi-open full digestions (HNO3(HCl)-HF-HClO4) for the subsequent analysis of major and trace elements, as well as rare earth elements; (2) microwave digestions for the subsequent analysis of volatile elements such as As, Se, etc. or (3) special digestions for the concentration of selected elements such as platinum group elements (tellurium co-precipitation). Specific leaching tests are used, for example, to extract readily soluble or acid-soluble components prior to their analysis. All digestion samples are measured by ICP-MS, ICP-OES or AAS depending on the element and the expected concentration.

Melt digestions also dissolve resistant minerals (e.g. heavy minerals), so that a complete decomposition of the rock matrix is possible. We analyse the fusion tablets with regard to the main element geochemistry by means of X-ray fluorescence analysis (XRF). However, melt tablets can also be further dissolved using acids and then analysed with ICP-MS or ICP-OES with regard to geochemistry.

We will be happy to advise you on the most suitable digestion and analysis method for your application.

Open/semi-open outcrops

DigiPRep, SPS Science, PFA vessels

Microwave

Microwave, START 1500, MLS GmbH

Leaching

Fusible solids