The GC-IMS-SILOX is the only ASTM (https://www.astm.org/d8455-22.html) and ISO-certified  (https://www.iso.org/standard/81976.html) 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 and biogas from sewage.
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