A private laboratory specialized in the analysis, testing and failure analysis of materials since 1993
A private laboratory specialized in the analysis, testing and failure analysis of materials since 1993
Definition :
Glow Discharge Optical Emission Spectrometry (GDOES) is used to perform chemical analysis and surface profiles on solid conductive materials.
Principle :
A GDOES is made up of a discharge lamp, an optical spectrometer, and a data acquisition & processing system.
The sample is put on a copper electrode (so the sample is the cathode, the copper the anode).
The discharge is applied between the anode and the cathode, that triggers off a sample surface erosion. Atoms ejected are then excited by an Argon plasma, and finally come back to their fundamental energy level, emitting a characteristic X photon.
Emitted photons, whose energy is characteristic of a chemical element’s energy level, are then collected by photomultipliers, that allows to quantify elemental composition of a material.
Two types of analyses can be performed :
- surface profile analysis : signal from each chemical element as a function of erosion time
- bulk analysis : global chemical analysis
Set-up :
Jobin Yvon 5000 RF
Bulk analysis programs : steels, cast irons, stainless steels, aluminum alloys, brazing alloys, copper-aluminum alloys
Elements detected from Hydrogen
Detection limits : depending on each program, contact us for more information
Qualitative programs for all types of conductive samples (up to 10 µm deep).
