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Siloxanes in biogas and landfill gas

Sampling & analysis of siloxanes in air (biogas & landfill gas)

Siloxanes are commonly found in both biogas and landfill gas. This family of organic compounds have a negative impact on machinery causing wear on internal parts with increased operating costs as a result.

Analytical method & sampling procedure

This analysis is performed using procedures adapted from EPA Method TO-17, ISO Method 16017, and NIOSH Method 2549.

Air samples are collected into tedlar bag on-site and then, using a syringe, a 60ml aliquot is drawn through the TD tube (type SVI). Sampling kits and instructions are provided to the client.


 

The method covers the following linear & cyclic siloxanes:

 
Typical sampling volumes
0.05 to 1L
TD Tube Volume = 0.05L for µg/m3
calculation
RL Units RL Units
Parameter Synonym ng µg/m3
DECAMETHYLCYCLOPENTASILOXANE D5(CVMS) 10 200
DECAMETHYLTETRASILOXANE MD2M(LVMS) 10 200
DODECAMETHYLCYCLOHEXASILOXANE D6(CVMS) 10 200
DODECAMETHYLPENTASILOXANE MD3M(LVMS) 10 200
HEXAMETHYLCYCLOTRISILOXANE D3(CVMS) 10 200
HEXAMETHYLDISILOXANE MM(LVMS) 10 200
OCTAMETHYLCYCLOTETRASILOXANE D4(CVMS) 10 200
OCTAMETHYLTRISILOXANE MDM(LVMS) 10 200

 

Frequently asked questions