glow discharge ionization mass spectrometry (GD-MS)

Glow Discharge Ionization Mass Spectrometry (GD-MS) is a technique used to analyze the composition of solid materials. It involves exposing the sample to a low-pressure, cold plasma—known as a glow discharge—where a high-voltage electrical current ionizes atoms within the material. These ions are then directed into a mass spectrometer, which separates and identifies them based on their mass-to-charge ratio. This method provides precise, sensitive measurements of trace elements and impurities in metals, semiconductors, and other solids, making it valuable in materials science and quality control.