Oral: Analysis of Multi-Class Odorous Compounds in Waste Management Using Gas Chromatography – Mass Spectrometry and Air Canister Sampling

This study presents an analytical technique for detecting and quantifying 43 odorous compounds in air samples using gas chromatography–triple quadrupole mass spectrometry (GC-QQQ-MS). Air samples were collected in 1-liter Silcocan canisters to preserve sample integrity and analyzed through direct injection into the GC-QQQ-MS system. The method utilizes multiple reaction monitoring (MRM), which improves sensitivity by minimizing chemical noise and enables detection at low parts-per-billion (ppb) to parts-per-trillion (ppt) levels. The method is designed to analyze multiple classes of odorous compounds in a single analytical run. The identified compounds include volatile organic compounds (VOCs), volatile fatty acids (VFAs), and sulfur- and nitrogen-containing odorants. Quantification was performed, and the results were compared with known odor thresholds to assess odor impact. This analytical approach provides a practical tool for evaluating odor sources and supports targeted mitigation strategies for the most significant compounds. By identifying and quantifying specific odorants, the method can enhance environmental quality, reduce physiological effects associated with odors, and assist waste handling operations (WHOs) in effectively managing odor-related issues. Overall, the study advances the development of improved odor management practices.