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What current research is being done in odor analysis?

My work involves complaints about industrial odors. We can use GC-MS to identify compounds, but the link between a chromatogram and the subjective human experience of "stench" is weak. A mixture's odor isn't the sum of its parts due to masking or synergy. What are researchers doing to bridge this analytical-perceptual gap? Are there advances in olfactometry or sensor arrays that move beyond simple compound identification?

 

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By Deeksha S Answered 2 years ago

The frontier is definitively in multimodal correlation. From my collaboration with flavor chemists, the gold standard is now GC-Olfactometry (GC-O), where a human sniffer port is attached to the GC to identify which chromatographic peaks actually have odor activity. The next step is Odor Activity Value (OAV) modeling, calculating the concentration over the threshold for each key odorant. I've seen promising work with advanced sensor arrays ("e-noses") calibrated not to specific chemicals, but to perceptual descriptors (e.g., "sulfurous," "rancid") derived from extensive panel data, creating a direct analytical proxy for human experience.

 

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