GIS
Gas Interface System
The Ionplus Gas Interface System GIS is the most versatile gas handling system for ¹⁴C-AMS measurements of CO₂. Direct measurements of CO₂ are performed on ultra-small samples of 3 to 100 μg carbon with the GIS + MICADAS/MILEA coupling. Gas measurements are the ideal solution not only for small samples but also for all lower precision samples in screening and high throughput studies. Sample CO₂ is mixed with helium and the mixture is continuously fed into the ion source of MICADAS/MILEA.
All functionalities of the instrument are software-controlled and fully automated for gas measurements without user interaction for 8 to 40 samples. Moreover, the coupling of virtually any CO₂-producing device is possible through the integrated zeolite trap.
KEY FEATURES
• Direct measurements of CO₂ in conjunction with MICADAS/MILEA
• Fully automated sample handling
• Highest versatility through diverse CO₂ sources
• Highest throughput for ¹⁴C measurements
• Blank and reference gases are conveniently measured from pre-mixed gas bottles
SPECIFICATIONS
• Handles CO₂ sample sizes between 3 and 100 μg carbon
• Versatile couplings with an Elemental Analyzer EA, a carbonate
system CHS 2 and an automated tube cracker (tube dimensions:
4.0 mm O.D., length: 70–80 mm)
• Online stable isotope information is obtained through a GIS +
IRMS coupling
• Fully automated measurements for up to 8 sealed tube samples
and up to 40 samples with EA or CHS 2
• 60–150 samples can be handled per day
• 4 auxiliary gas inlets for reference gases
