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GDOES
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Comprehensive Analysis
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analysis solution
Save time and money with our GDOES devices at Spectruma Analytik, where we take pride in providing the complete solution for all your analysis needs. Thanks to invaluable insights and feedback from our customers, we have emerged as one of the leading manufacturers of GDOES spectrometers. Whether you need instruments for incoming goods inspection, production monitoring, industrial quality control or scientific research, rest assured that we have the right instrument for you. Our high-quality GDOES spectrometers offer swift and remarkably precise measurements for bulk and depth profile analysis of solid materials. Rely on our expertise and make the right choice for your application. Users worldwide benefit from our instruments' fast, accurate, and reliable results every year.
GDOES – Briefly Explained
Simplified Operating Principle
The sample is inserted into the glow discharge source, where it comes into direct contact with the cathode, effectively acting as a cathode itself.
During the analysis, the glow discharge source contains argon gas at low pressure (0.5 hPa to 10 hPa). A high DC voltage is applied between the anode and the sample (acting as the cathode). This process releases electrons at the sample's surface and accelerates them towards the anode.
As the electrons gain kinetic energy, they release it through inelastic collisions with argon atoms, resulting in ionization of the argon atoms and the formation of argon cations and free electrons. This avalanche effect increases the density of charge carriers, transforming the insulating argon gas into a conductive state and forming a plasma—a mixture of neutral gas atoms and free charge carriers.
The argon cations are driven towards the sample surface due to the high negative potential present there. Upon impact with the sample surface, the argon cations transfer their kinetic energy to the atoms on the surface, causing them to be dislodged from the sample. This phenomenon is known as cathode sputtering or simply sputtering. The degradation of the sample surface occurs in a plane-parallel manner.
The atoms knocked out from the sample diffuse into the plasma, where collisions with high-energy electrons excite them to higher energy states. As these atoms return to their ground states, they emit light with characteristic wavelength spectra unique to each element.
The emitted light passes through the entrance slit and then onto a holographic grating, which directs it towards different detectors based on the diffraction angle of the wavelengths. The light is registered and measured by the detectors accordingly.
The intensity of each line is directly proportional to the concentration of the corresponding element in the plasma. For electrically non-conductive materials, high-frequency alternating voltage can be employed to generate plasma, allowing examination of non-metallic samples as well.
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Training date 2
27. of March to 28. of March 2025 at Spectruma company Hof, Germany. Please click here to sign up.
Training date 1
25. of March to 26. of March 2025 at Spectruma company Hof, Germany. Please click here to sign up.
Plasma Winter Conference in Berlin 2025
The Plasma Winter Conference will be heldt in Germany in 2025. Use the opprotunity to meet operators and producers in the field of plasma like GD-OES and GD-MS on a special meeting during this session, organized by the EW-GDS and its chairman Pete Robinson
Innovative Techniques for Accurate Hydrogen Analysis and Material Safety
Hydrogen Detection in Materials with GDOES
Discover how Glow Discharge Optical Emission Spectroscopy (GDOES) offers unparalleled sensitivity for detecting hydrogen, an element crucial for preventing material fatigue due to hydrogen embrittlement.
WinGDOES
Software WinGDOES 5.5
WinGDOES 5.5 is now available! With even more features and improvements, our latest software version offers an even more efficient and user-friendly experience. Update now and take advantage of the new possibilities!
Spectruma
For over 40 years, Spectruma® has been at the forefront of manufacturing and developing high-tech instrumentation for elemental analysis. Our exceptionally powerful method, glow discharge optical emission spectrometry (GD-OES), enables precise bulk analysis of almost all elements, including H, C, N, and O. Simultaneously, it provides the highest depth resolution for depth profile analysis of surface layers.
