QMS 403/5 SKIMMER® – Coupling system Netzsch (Germany)

Highest detection sensitivity through direct coupling of the STA 409 CD with a quadrupole mass spectrometer (QMS) – evolved gas analysis (EGA) method.

מק"ט QMS403-5 קטגוריה

תיאור

The SKIMMER® coupling system with a quadrupole mass spectrometer (QMS) is worldwide the most sensitive system for thermoanalytical gas analysis. The coupling takes place directly in the furnace of the STA 409 CD, which is especially developed for the usage with the SKIMMER® coupling. The first pressure reduction stage is arranged directly above the sample container. The orifice is so designed that it works as divergent nozzle. The SKIMMER® is the second pressure reduction stage and arranged in the range of the forming compression area behind the nozzle. The distance between sample and high-vacuum component is only ca. 12 mm. As the entire system has sample temperature, condensation during gas transfer are excluded. Due to the vertical gas flow in the sample area and the short distances a complete transfer of the evolving gases is ensured. This again results in short retention times and an extremely high sensitivity.
The STA 409 CD is designed for simultaneous TGA-DSC or simultaneous TGA-DTA measurements. The TGA sample carriers can be exchanged with TGA-DSC or TGA-DTA sample carriers in a matter of seconds so that a very powerful and versatile STA is always ready.

QMS 403/5 SKIMMER® – Technical Specifications
STA and QMS features:
• Temperature range:
SiC furnace: RT to 1450°C with SKIMMER® orifice from alumina
Graphite furnace: RT to 2000°C with SKIMMER® orifice from glassy carbon
• Heating rate: Standard furnaces: 0.001 to approx. 100 K/min
• Weighing range of balance system: 15000 mg
• TG resolution: 2 µg
• Sensor types: DSC, DTA, TG, DSC-cp, quickly exchangeable
• Extension with unique OTS® system (option)
• Extension with glove box available (option)
• Corrosion resistant version available (option)
• Crucibles of various types and in in different dimensions
• Different mass ranges Selectable with QMS:
1 u to 512 u
1 u to 1024 u
• Resolution:
0.5 u
• Ion source
– Electron impact, energy 0 … 125 eV, in steps of 1 eV adjustable,
for “soft” and “hard” ionization
Note: limits below 40 eV require a reduction of emission and adaption of further ion source voltages in order to avoid superheating of the cathode – Low mass construction, special Cross Beam
• Cathodes/filments: Tungsten
• Measuring modes / scan rates:
Analog scan
Scan Bargraph
Multi Ion Detection (MID)
• 90° SEV
Detection limit > 10-14 mbar, or > 100 ppb
• SKIMMER® temperature:
sample temperature
• SKIMMER® material:
Alumina (1450°C)
Glassy carbon (2000°C)

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