Portal de Periódicos da CAPES

Odor Intensity Measurements in Gas Chromatography-Olfactometry Using Cross Modality Matching: Evaluation of Training Effects

2001; American Chemical Society; Linguagem: Inglês

10.1021/bk-2001-0782.ch015

1947-5918

G. Callement, M. Bouchet, D. Langlois, P. X. Étiévant, Christian Salles,

Analytical Chemistry and Chromatography

The aim of this paper was to report the GC-O training effect on the performances of a panel evaluating odor intensities in gas chromatography effluents by cross modality matching with the finger span method. The panel was first trained with different concentrations of ethylbutyrate and, in order to test the influence of the odor quality on the performance of each panelist, ethylbutyrate and hexanal were then alternatively used. Training was followed by the evaluation of model mixtures containing 11 different compounds in various concentrations. An analysis of beer samples was finally performed by trained and untrained panelists to test the effect of training on panelist performance ; that was a larger number of odors detected, a better estimation of the odor intensity leading to a better discrimination of the samples.