Volatile chemicals can be analyzed using a variety
of techniques from qualitative, non-specific detectors
to very reliable and quantitative GC and GCMS methods.
In many cases, remote sample collection and laboratory
analysis have several advantages over on-site analysis.
Simple, rugged samplers allow the collection of gas,
liquid or solid samples without the need for power,
field calibration or highly experienced technicians.
Collecting the sample without modification in the field
eliminates the chance of losing important analytes,
as can occur with adsorption tubes. Samples can be
collected from several locations and then analyzed
on the same laboratory instrument. The result is lower
overall costs and elimination of inter-instrument bias.
Entech has been perfecting the art and science of
quantifying levels of volatile chemicals in gas phase
matrices from % levels to well below 1 PPB. A new surface
coating called Silonite TM allows stainless steel sampling
containers, transfer lines and connective fittings
and valves to be rendered as inert as fused silica,
greatly extending the range of compounds that can be
collected in the field. With Silonite coated canisters,
compounds can be analyzed up to several weeks later
with very little change in gas phase concentrations.
Turn key solutions are available for field sampling
into vacuum tight Silonite coated canisters, laboratory
analysis using multi-position autosamplers and cleanup
systems that allow the coated canisters to be re-used
hundreds of times.
Entech is a leading supplier of canister based sampling
equipment, for the collection of volatile compounds
and analytical instrumentation for measurement of volatile
compounds in the gas phases by GC and GCMS. Our environmental
products meet EPA specifications for methods TO1, TO2,
TO3, TO12, TO14 and TO15 for VOC sampling analysis.
