Extractive FTIR monitoring consists of transporting a gas sample from a source (stack exhaust, process line, ambient air, etc.) to an FTIR cell for analysis. This can be for a wide variety of gas sampling applications (compliance testing, pollution control destruction/removal efficiency (DRE) determination, emissions characterization, process optimization, engineering studies, etc.) and is typically performed dynamically by continuously flowing the gas sample through the analysis cell within the FTIR. Infrared radiation (IR) is directed through the analysis cell allowing for continuous analysis of the sample. Most FTIRs can collect a spectrum of the infrared absorbance of the gas in the cell and analyze it in approximately 1 second, but a sample frequency of 1-5 minutes where individual 1-second spectra are averaged, is more typical. The additional averaging time allows for a better signal-to-noise ratio, thus lower detection limits.
Spectrum Environmental Solutions sets itself apart by offering full-service extractive FTIR monitoring. Collectively, our scientists have over 50+ years performing extractive FTIR measurements across a myriad of industries/industrial sources in accordance with the most common published protocols (EPA Methods 320 and 321, ASTM D6348-12, EPA Protocol for Measuring Destruction or Removal Efficiency (DRE) of Fluorinated Greenhouse Gas Abatement Equipment in Electronics Manufacturing, etc.). Furthermore, our scientists have worked with EPA and industry consortiums to author or provide input on several FTIR based protocols/regulations (e.g. 40CFR part 98 Subpart I, SEMATECH Guideline for Environmental Characterization of Semiconductor Process Equipment Revision 2 and the ongoing, October 2017, revision to EPA Method 320). This extensive expertise can be counted on to perform extractive monitoring of almost any source ensuring FTIR data of the highest quality.
Finally, as a manufacturer of extractive FTIR systems, our scientists are well versed not only in performing extractive monitoring but also in the assembly and operation of FTIR hardware. This relevant experience is a huge advantage for mitigating downtime due to equipment issues. Additionally, as a vendor of the FTIR systems, we maintain an inventory of equipment and can quickly repair malfunctioning instruments.