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UMEG is a leading German air quality monitoring and research organization
with its headquarters in Karlsruhe, Germany. The organization has
recently conducted a research project to characterize the performance
of the ChemComb
Model 3500 Speciation Sampling Cartridge from Rupprecht &
Patashnick. The module can be used in a number of different ways,
for example as the flexible sampling device used in R&P Partisol
Model 2300 Speciation Sampler.
A unique feature of the ChemComb sampling cartridge is a patented
glass honeycomb denuder that can effectively separate selected gases
from the sample stream while allowing particulate matter to proceed
to a multi-stage filter pack located downstream.
The initial stage of UMEG's research work has now been compiled
in the form of an intermediate report available in English
(2 MB) and German
(420 KB). The report is entitled "Examination of the Suitability
of the Partisol Speciation as a Sampling System for Gaseous and
Particle-Bound Inorganic Air Pollutants," dated May 2001.
The UMEG report describes the results from laboratory analyses involving
the inorganic gases sulfur dioxide (SO2), nitrogen dioxide (NO2),
and ammonia (NH3). For each gas, the UMEG measured the collection
efficiency of a single and dual-stage honeycomb denuder system at
different concentrations and exposure durations. In addition, the
appendices of the report provide detailed procedures for the coating,
handling and analysis of the honeycomb denuders for SO2, NO2 and
NH3 measurements.
The document concludes that ChemComb Cartridges used in combination
with R&P's Partisol Model 2300 Speciation Sampler provide sufficient
collection efficiency and resolution for determining the concentrations
of SO2, NO2 and NH3 for regulatory compliance purposes. This applies
to both existing and planned future ambient air regulations.
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Depicting laboratory procedures from appendices of UMEG intermediate
report... |
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UMEG Evaluates ChemComb Cartridge 
