Intertek provides expertise and state-of-the-art equipment for sampling and analyzing particulate matter in moving gas streams, including Stack emissions and Vent emissions. Depending on the situation Intertek emission sampling and analysis procedures are tailored to meet specific plant and site conditions.

Interek helps customers establish if emissions are within permit requirements, determine the efficiency of gas cleaning systems and identify which emissions are causing complaints. Emission measurement capabilities include:

• Global Emission Testing Services
• Stationary Source Emission Measurement
• Bioscrubbing
• Stack Emission
• Vent Emission
  

Particulate matter in moving gas streams is measured in accordance with NEN-ISO 9096 / NEN-EN 13284-1. The gravimetric determination of the concentration of particulate matter in a moving gas stream is based on a sample flow being extracted for a measured period of time. The concentration is calculated from the mass and volume of the sample relative to standard conditions.

In order for the results to be accurate, the sample must be withdrawn iso-kinetically. The velocity and direction of the gas entering the sampling nozzle must be the same as that of the gas to be sampled. For isokinetic withdrawal it is essential that the velocity and direction of the gas in the duct be precisely known.

Distribution of the gas velocity and particulate concentration in a duct usually are complex. The particles, differing in size and structure, may be dispersed non-uniformly and the gas velocity may be different in different areas. Moreover, the velocity and concentration may strongly fluctuate in time. The determining factor is the mean particulate concentration calculated from gas volumes and mass flow rates measured at a sufficient number of sampling points in the sampling plane area for a sufficient period of time.

For more information on this subject, contact Intertek Polychemlab by Email or telephone +31 46 476 27 13