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Correlations between sensory and instrumental techniques are discussed in terms of specific requirements. Empirical correlations may not reflect a valid relation between the measured sensory property and the objective technique. A cause-effect relationship between instrumental and sensory measurements is much more difficult to establish, and the requirements for such a relationship depend on the particular problem. No simple set of rules can insure success in relating these two types of measurement. A series of examples illustrating the requirements for coordinating GLC and sensory measurements on Delicious apple essence are given.
sensory, evaluation, odors, chemical analysis, gas chromatography, threshold
Head, Argicultural Research Service, U.S. Department of Agriculture, Albany, Calif.