A gas chromatograph equipped with an olfactory detection port so separated volatile compounds can be detected and described by human assessors; it can support GC-O, aroma extract dilution analysis, detection-frequency analysis, and sensory-directed identification.
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Tool definition
A gas chromatography–olfactometry system is a gas chromatograph with an olfactory detection port. The instrument separates volatile compounds while one or more trained assessors detect and describe odor events at corresponding retention times.
It is used in sensory-directed aroma analysis, including GC-O, aroma extract dilution analysis, detection-frequency analysis, and the identification of candidate odorants for later quantification, recombination, and omission testing.
Evidence and context
Supported by LOCAL-073, printed pp. 523–524 and 923–925 (PDF sheets 540–541 and 940–942), after full textual and visual review.
GC-O does not by itself prove global sensory importance. Extraction bias, matrix effects, assessor variability, sub-threshold interactions, and the absence of nonvolatile context can change interpretation. Stronger studies pair it with relevant-matrix thresholds, quantification, replication, recombination, and omission.
