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High Performance Glow Discharge Mass Spectrometers (GDMS)

GD90trace (Glow Discharge Mass Spectrometry)

The main focus of MSI is high resolution glow discharge
mass spectrometry (GDMS); a mature, versatile technique
for the direct determination of elemental content (matrix to sub-trace) in a variety of materials.

Features of HR-GDMS
  • Full elemental analysis of major (wt%) to ultra-trace (ppb to sub-ppb) elements within a single scan
  • Direct solid sampling technique alleviating the need for chemical digestion
  • Continuously variable high resolution capabilities from <400 to >10,000 RP (10% valley definition)
  • Dual collectors allowing up to 12 orders of linear dynamic range
  • Proven technique for high sensitivity depth-dependent distribution analysis of trace elements in coatings and other multi-layered advanced materials
  • Minimal matrix effects allow calibration without matrix matched standards by using Relative Sensitivity Factors (RSF)

GD90 Trace Key Features
  • Tantalum cell and source construction for ease of cleaning
  • Availability of cryo-cooling of the GD cell to minimise gas backgrounds
  • Accommodates both pin and flat cell geometries
  • No mass bias for light/heavy elements
  • Calibration consists of a quick check of 180Ta and 181Ta to ensure that the IC and Faraday detectors are in agreement
  • Low gas flow allows for cost-effective use of an alternate ionisation gas such as krypton
  • Ability to analyse a wide range of samples ranging from alloys to high purity materials (both conductive and non-conductive) in a plethora of sample geometries
  • Low sputter rate – at normal analytical conditions the sputter rate ranges from 150 nm/minute (conductive) to 100 nm/minute (non-conductive); lowering operational conditions allows sputter rate to be slowed by at least 5x
  • RSFs and Detection Limit determinations are derived from published, readily sourced methods
  • Front end assembly allows for the fitting of a custom-designed glove box for nuclear applications

Able to analyse a plethora of materials:
GDMS can fully compensate for the shortcomings of ICPMS with solids measurement
  • Powders,Oxides,Low m.p. materials
  • Pellets,Shards,Foils
  • Waste products,Screws,Wires
  • Composites,Thin films/coatings,Surface analysis
The GD90 was designed on the Organic Autoconcept platform with field-proven optics of over 200 units installed