Glow Discharge Mass Spectrometry (GDMS)

The chemical composition of inorganic solid samples is directly analyzed using glow discharge atomization / ionization sources combined with high mass resolution analyzers (Glow Discharge Mass Spectrometry or GDMS). The sensitivity, ease of calibration and the robustness to analyze a wide variety of samples make GDMS analysis an excellent choice for trace and ultra-trace level determinations. Besides full survey evaluations, it is also possible to quantitatively measure depth specific distributions of elements in wide variety of samples with very high sensitivity.

EAG is the industry leader for Glow Discharge Mass Spectrometry (GDMS) analytical services with the largest number as well as variety of GDMS instruments installed. Our depth and breadth of experience and dedication to innovative analytical methods is unrivaled.

Ideal Uses of GDMS

Full survey measurements of advanced materials (metals, alloys, graphite, electronic materials, oxides, and ceramics).
Depth specific trace and ultra-trace distribution measurements on films, thin layers and coatings.
Traceability of unknowns from limited amount of samples
Chemical characterization of particulate materials and engineering coatings

Strengths

Full survey of all stable isotopes, except H
Parts per billion detection
Limited matrix effects
Linear calibration
Robustness
Depth specific distribution measurements of analytes with high sensitivity

Limitations

Sample consistency
Vacuum stability

GDMS Technical Specifications

Signals Detected: Mass resolved positive ions
Elements Covered: All stable isotopes of elements, except H
Sensitivity: parts per billion or ppbw
Typical Sampling Areas: 50-80 mm²