Gas chromatography-olfactometry
- 1 September 2006
- journal article
- research article
- Published by Wiley in Journal of Separation Science
- Vol. 29 (14), 2107-2125
- https://doi.org/10.1002/jssc.200500509
Abstract
GC‐olfactometry (GC‐O) refers to the use of human assessors as a sensitive and selective detector for odour‐active compounds. The aim of this technique is to determine the odour activity of volatile compounds in a sample extract, and assign a relative importance to each compound. Methods can be classified into three types: detection frequency, dilution to threshold and direct intensity. Dilution to threshold methods measure the potency of odour‐active compounds by using a series of extract dilutions, whereas detection frequency and direct‐intensity methods measure odour‐active compound intensity, or relative importance, in a single concentrated extract. Factors that should be considered to improve the value of GC‐O analysis are the extraction method, GC instrument conditions, including the design and operation of the odour port, methods of recording GC‐O data and controlling the potential for human assessor bias using experimental design and a trained panel. Considerable emphasis is placed on the requirement for multidimensional GC analysis, and on best practice when using human assessors.This publication has 71 references indexed in Scilit:
- Hyphenated Headspace-Gas Chromatography-Sniffing Technique: Screening of Impact Odorants and Quantitative Aromagram ComparisonsJournal of Agricultural and Food Chemistry, 1997
- GC sniffing analysis: olfactive intensity measurement by two methodsZeitschrift für Lebensmittel-Untersuchung und Forschung, 1995
- Combined gas chromatography and sniffing port analysis of volatile compounds of mineral water packed in polyethylene laminated packagesFood Chemistry, 1993
- SENSORY THRESHOLDS: ESTIMATION FROM DOSE‐RESPONSE CURVESJournal of Sensory Studies, 1991
- Variation in odor detection thresholds determined by charm analysisChemical Senses, 1988
- Identification of the most intense volatile flavour compounds formed during autoxidation of linoleic acidZeitschrift für Lebensmittel-Untersuchung und Forschung, 1987
- Differential Sensitivity for Smell: "Noise" at the NoseScience, 1977
- THE GAS CHROMATOGRAPH WITH HUMAN SENSOR: PERFUMER MODELAnnals of the New York Academy of Sciences, 1964
- Autoxidation of Milk Lipids. III. Effect on Flavor of the Additive Interactions of Carbonyl Compounds at Subthreshold ConcentrationsJournal of Dairy Science, 1963
- The surprising simplicity of sensory metrics.American Psychologist, 1962