Gas chromatograph airmoMEDOR®

GCprocessfor the analysis of trace impurities

Overview
The airmoMEDOR® is an automatic gas chromatograph (autoGC) for the analysis and continuous monitoring of odorous sulfur compounds with trace detection for odor and nuisance control. It detects trace amounts of Methyl-Mercaptan, Ethyl-Mercaptan, Di-Methyl-Sulfide, Di-Methyl-Di-Sulfide and Di-Ethyl-Sulfide using electrochemical wet cell detection (MEDOR® technology). The analyzer can be used for monitoring of urban and non-urban pollution, monitoring of industrial nuisance, deodorization processes and fugitive emissions.

Measured compounds

• Methyl-Mercaptan (MM)
• Ethyl-Mercaptan (EM)
• Di-Methyl-Sulfide (DMS)
• Di-Methyl-Di-Sulfide (DMDS)
• Di-Ethyl-Sulfide (DES)

Technical details and performance

• Detection limits:
  • DES and DMS < 150 ppt (0.15 ppb)
  • DMDS, MM and EM < 50 ppt (0.05 ppb)
  • H2S and SO2 option < 5 ppb
• Detection range:
  • 0 to 100 ppb
  • Other ranges available on demand
  • Calculations available: Odor Index, Total Sulfur, Total mercaptans
• Relative Standard Deviation (RSD):
  • RSD < 3% on concentration over 48H
  • RSD < 0.5% on retention time over 48H
• Results / Data handling:
  • Embedded computer, Windows® based with LED display
  • 128 GB SSD hardware storage
  • Ethernet connectivity and remote control
• Linearity:0.995 for all compounds
• Cycle time:
  • MM, EM, DMS, DMDS, DES: 900 s
  • With H2S and SO2 option: 2400 s
  • With IPM, TBM, NPM, 2BM, IBM, NBM and MES option: 1800 s
• Gas supply:
  • Carrier: Dry air or N2 (3 bars): ≤ 4 mL/min
  • CALIB continuous: ~50 mL/min
  • CALIB during validation: ~250 mL/min
  • Pneumatic valve: 90 mL/commutation

Applications

• Urban and non-urban air quality monitoring
• Industrial nuisance monitoring and odor control
• Deodorization process control
• Fugitive emission monitoring

Standards, approvals & certifications

• GOST certification available
• ATEX and IECEx (zone 1, group IIC, T4) approvals available

Technical specifications

• Product: airmoMEDOR® automatic gas chromatograph (autoGC)
• Detection technology: MEDOR® electrochemical wet cell detection
• Detection limits: down to tens of parts per trillion for key sulfur compounds
• Measurement range: typically 0–100 ppb (custom ranges on demand)
• Data storage: 128 GB SSD, Windows® embedded, Ethernet remote control
• Cycle times: 900 s to 2400 s depending on configuration
• Carrier gas: dry air or nitrogen at ~3 bars
• Certifications: GOST, ATEX/IECEx options