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The GC-IMS-SILOX is a stand-alone device to precisely quantify concentrations of the individual linear L2, L3, L4 and L5 same as the cyclic D3, D4, D5 and D6 siloxanes in landfill/ sewage/ and biogas.

Advantages of GC-IMS-SILOX for siloxane analysis: 

  • On-site measurements with “one-click” menu
  • On-line/continuous monitoring at set intervals
  • Very low detection limits (µg/m3) with 'total silica' (SiO2) and 'total silicon' (Si) results 
  • High reproducibility and accuracy
  • Very low running and maintenance costs 
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Descripción detallada


Landfill/sewage biogas produced during the digestion of organic materials in the absence of oxygen and used as alternative source to mainly feed combustion engines. It produced from agricultural waste, municipal waste, plant material, sewage or sludge and green or food waste. Biogas contains mainly methane (CH4) and carbon dioxide (CO2). Due to the presence of silicon containing materials in the waste coming from sources like washing agents, skin care products or waterproofing materials siloxanes formed. Biogas can upgraded and inserted into natural gas pipelines or burned as fuel in a power generation facility. Problems occur if the amount of siloxanes in the biogas surpasses a critical value that jeopardizes the valves and pistons of the engine of the power generator through the formation of silica (SiO2). Therefore, the concentration of siloxanes must be controlled and kept below a maximum level. The conventional way to control the silicium amount is to take a gas sample in a bag and analyse it with gas chromatography – mass spectrometry (GC-MS). This causes an important information delay regarding the composition of the gas with respect to its siloxane concentration.

Besides, power the GC-IMS-SILOX only needs N2 or synthetic air as drift and carrier gas for operation. Its menu allows an on-site test to be carried out safely by non-specialists. Alternatively, it can used as a 24/7 based on-line monitoring tool to test for individual siloxanes at their relevant concentration levels to take immediate on-site decisions.



Working Principle: Gas chromatography - Ion mobility spectrometry

GC-Column: 30m capillary column

Detector Source: 300 MBq H3, below the exemption limit of 1 GBq EURATOM guideline, no licence necessary

Sampling: Heated electrical 6-port-valve

Sample Introduction: Internal pump (250 mL/min.)

Measurement Range: 0.1 - 5 mg/m3 for single siloxanes

Display: 6.4” TFT touch screen display

Data Acquisition: Ultra-fast ADIO-board

Data Processing: 1.6 GHz Intel atom

Data Storage: Min. 4GB compact-flash memory or USBStick

Interfaces: RS232, USB, Ethernet, 4-20mA Current Loop

Pressure: Ambient

Power Supply: 100 – 240 V AC, 50-60 Hz (external)

                         24 V DC / 5A, XLR-connector (internal)

Temperature Operation: 0 – 45°C

Dimensions: 449 x 435 x 177 mm (WxDxH)

Weight: 15,5 kg

Housing: 19” compatible, IP 20 enclosure, CE-marking.

Cooling: Axial ventilator, speed control temperature related.

Gas Connectors: 3 mm stainless steel Swagelok connectors for drift gas inlet, sample gas in- and outlet, carrier gas inlet and IMS gas outlet.

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