Shanghai LingLu DEMS QAS-100/PrismaPro Differential Electrochemical Mass Spectrometer

1. QAS 100/PrismaPro Differential Electrochemical Mass Spectrometry 

• Quadrupole Mass Spectrometer
• Ion Source: EI (Electron Impact Ionization)
• Mass Range: 1–100 amu
• Filament Configuration: Dual filaments (1 active, 1 standby); Material: Iridium-Yttrium Oxide (Ir–Y₂O₃)
• Minimum Detectable Partial Pressure: 3 × 10⁻¹⁵ mbar
• Sensitivity: > 5 × 10⁻⁴ A/mbar (Faraday detector)
• Mass Resolution: < 1 amu
• Maximum Operating Pressure:
  • • 5 × 10⁻⁴ mbar (Faraday detector)
    • 5 × 10⁻⁵ mbar (SEM detector)
• Detection System: Dual detectors (Faraday Cup & Secondary Electron Multiplier)
• Built-in Protections: Dual safeguards for pressure and filament emission current
• Filament Emission Current Range: 1–2000 μA
• Adjustable Electron Energy: 15–102 eV
• Vacuum System: High-vacuum molecular pumping system with ultimate pressure < 5 × 10⁻⁸ mbar
• Turbo Molecular Pump: Semi-magnetic levitation type
• Pumping Speed: > 65 L/s
• Rotation Speed: > 90,000 rpm
• Backing Pump: Oil-free dry pump; ultimate pressure down to 3 mbar
• Vacuum Gauge: Combined Pirani + Cold Cathode Gauge
• Measurement Range: 1000 mbar – 5 × 10⁻⁹ mbar

2. Sample Introduction System (Capillary Tube Membrane Inlet System)

• Integrated electrochemical cell leak detection safety system
• Electrolyte backflow prevention system to protect the vacuum unit
• Vacuum System: Independent side vacuum pumping system with ultimate vacuum: 6.7 × 10⁻¹ Pa
• One low-temperature cold trap with minimum temperature: –75 °C (adjustable)
• 3 sets of Swagelok valves 

3. Probe-Type Electrochemical Cell

• Compatible with single-crystal electrodes, bulk sheet electrodes, powder catalysts, and gas diffusion electrodes
• Electrolyte Volume: 30 mL to 80 mL
• 30 mL small-volume cell is suitable for isotope labeling experiments
• Includes 1 set of high-definition video microscope and 1 HD display monitor
• Spatial Resolution: < 10 μm

4. Classic Electrochemical Cell

• Compact volume; suitable for powder catalysts or catalyst-loaded carbon paper substrates
• Electrolyte Volume: 1 mL – 3 mL
• Particularly suitable for isotope labeling experiments; also applicable for photoelectrocatalytic reactions
• Response Time: < 1 s
• Expandable to H-type cell (dual-chamber design with ion exchange membrane compatibility)
• Equipped with gold-plated, water-blocking, gas-permeable PTFE membrane

• • • PTFE Membrane Porosity: 50%
    • Pore Size: 20 nm

5. Gas Diffusion Electrode DEMS Electrochemical Cell

• Gas diffusion electrode structure; supports high current density
• Working Electrode Area, Diameter: Ø 8 mm
• High collection efficiency for liquid-phase products
• Compatible with detection of both gas-phase products and volatile liquid-phase products
• Capable of capillary inlet for rapid gas-phase product analysis

6. Setup and On-site training Included

• On-Site Training in Singapore
• Warranty: 12 months from date of commissioning.