Preparation

For a high-quality analysis, the samples must be prepared beforehand, i.e. sawn, crushed, pulverized and homogenized. In addition to the preparation of complete samples, we also offer the possibility of spatially resolved powder sampling (>30 µm). The mineralogy, geochemistry or isotopy of the solids can then be analysed on the pulverised material. Grinding vessels made of various materials are available for contamination-free sample preparation.

Grindings are the basis for microscopic mineral characterization (reflected light/transmitted light microscopy, SEM), as well as for high-resolution investigations of geochemistry (microprobe, synchrotron, LA-ICP-MS). Adapted to the respective examination method, we offer ground sections in various thicknesses and designs.

We will be pleased to advise you on the most suitable preparation and ground sections.

Grinding

Method	Task	Device/Material
Rock crusher	Crushing (hand pieces)	Retsch
Jaw crusher	Crushing (cm-mm)	Retsch
Vibrating Cup Mill	Pulverization/ Homogenisation	Sieving technology / agate, corundum, tungsten carbide
Planetary micro mill	Pulverization/ Homogenization	Pulverisette 7, FRITSCH / corundum, tungsten carbide
Micromill (locally dissolved)	Pulverization	Olympus SZ61, Dover

Drying

Process	Task	Device
Freeze drying	Water content, preservation	Christ Alpha 1-4, 100400
Drying	Water content at 105 °C	Drying ovens, Memmert
Ashing	Loss on ignition	Muffle furnace, Nabertherm

Ground joints (28x48 mm)

Type	Thickness	Variant
Thin sections	30 µm	polished, capped, polished on both sides, removable
Thick sections	100 µm	polished, capped, polished on both sides, removable
Ground joint	variable	polished (cloth or lead plate)