The sampling is done at-site by the customer according to our tested procedures. After the sampling, the PPT is returned to our central analytical facility where the actual chemical analysis is performed. Depending on whether the customer is interested in determining Airborne Molecular Contaminants (AMCs) in pressurized gases or in ambient air, we have two versions of the PPT available. Typical gases that can be determined are NH3 and small amines, SO2, H2S, HF, HCl, NOx, small organic acids, and hydrocarbons: volatiles, non-volatiles and refractories. Detection limits range from the ppb level to, in some cases, sub-ppt.
However, attainable detection limits and required sampling times can differ strongly for the various gases. We are presently looking into extending the analytical methods underlying our PPT services. In order to focus our attention and help our (prospective) customers best, we would like to hear from you what gas cleanliness issues are most important. More specifically, we would like to learn: which AMCs are most important, what detection limits are required and how long are the typically available sampling times?
You can also contact us directly for more information: