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The ions can then be detected by mass spectrometry. In this case, it is the mass of the ions that identify the element and the number of ions that reflect the concentration. This method is referred to as glow discharge mass spectrometry (GDMS) and it has detection limits down to the sub-ppb range for most elements that are nearly matrix ...
Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ... Others include glow discharge, field desorption (FD), fast atom ...
Photons are emitted with excited waves and have characteristic wavelengths which are recorded by means of a downstream spectrometer and subsequently quantified. When using a high-frequency alternating voltage for plasma generation and the corresponding construction of the glow discharge source, non-metallic samples can also be examined.
Glow discharge mass spectrometry is the direct determination of trace element in solid samples. It occurs with two ionization mechanisms: the direct electron impact ionization and Penning ionization. Processes inherent to the glow discharge, namely cathodic sputtering coupled with Penning ionization, yield an ion population from which semi ...
Mass spectrometry generally gives significantly better analytical performance, but is also significantly more complex. ... (atom and vapor source), glow discharge ...
GC-MS – Gas chromatography-mass spectrometry; GDMS – Glow discharge mass spectrometry; GDOS – Glow discharge optical spectroscopy; GISAXS – Grazing incidence small angle X-ray scattering; GIXD – Grazing incidence X-ray diffraction; GIXR – Grazing incidence X-ray reflectivity; GLC – Gas-liquid chromatography; GPC – Gel permeation ...
The mass spectrometry analysis, however, takes place at high vacuum condition. Therefore, ions entering the mass spectrometer, first go through a source - to - analyzer interface (vacuum interface), which was designed in order to bridge the atmospheric pressure region to the mass spectrometer vacuum. It also minimizes spectrometer contamination.
A corona discharge is an electrical discharge caused by the ionization of a fluid such as air surrounding a conductor carrying a high voltage. It represents a local region where the air (or other fluid) has undergone electrical breakdown and become conductive, allowing charge to continuously leak off the conductor into the air.
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