Analysis of odorous volatile organic compounds by TD-GC/MS/FID/PFPD

Development and applications to real samples.


Polvara E., Morosini D., Invernizzi M., Sironi S., 2022, Analysis of Odorous Vocs Using Td-gc-ms/fid/pfpd: Development and Applications to Real Samples, Chemical Engineering Transactions, 95, 151-156 DOI:10.3303/CET2295026

This work aims to present the applicability of a gas chromatograph equipped with three detectors for the analysis of odorous mixtures.

An Agilent gas chromatograph (mod. 8890), equipped with a mass spectrometer (Agilent 5977B MSD), a flame ionization detector (FID, Agilent) and a pulsed flame photometric detector (PFPD, OI Analytical mod. 5833) was used. Simultaneous acquisition from the MS, FID and PFPD detectors was achieved. The subdivision of the sample into the three detectors was carried out at the end of the chromatographic column, using a splitter with capillary flow technology (Agilent Splitter CFT). The air samples were collected directly from the Nalophan™ sampling bags, these were connected to the Markes, Air Server-xr system and the samples sent to the Markes, Unity-xr thermal desorber.

The instrumental solution allows to obtain the specific detection and quantification of organic compounds by FID analysis, sulfur compounds by PFPD and the identification of compounds by MS analysis, by comparison with mass spectra. Based on the preliminary results obtained, the application of the TD-GC/MS/FID/PFPD configuration to the analysis of odorous samples has allowed the determination of specific classes, even in traces, in this way the subsequent identification of these is possible compounds during a single chromatographic run. The configuration offers significant time and cost savings in calibration and analysis of chromatographic data.

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