Introduction

Among wine defects, 2,4,6-trichloroanisole has a specific impact on wine perception. In addition to giving to the wine an unpleasant odor, 2,4,6-trichloroanisole has a masking effect on notes. In this study, the specificity and efficacy of the masking effect of 2,4,6-trichloroanisole was tested at infra- and supra-threshold concentrations. A simplified model of a binary mixture was also studied for in-depth analysis of this phenomenon.

Methods

Techniques used included sensory analysis (odor profiling), psychophysical tests (threshold measurement and triangle test), chemical analyses (GC-MS), and a mono/dichorhinic stimulation paradigm, to test the hypothesis of peripheral interaction.

Results

The results revealed that TCA had a masking effect on a range of aromatic notes, even at infra-threshold concentrations. However, they also showed counteraction of odorant specificity by 2,4,6-trichloroanisole. The origin of this masking effect was also discussed. The results suggested that this interaction can be assumed to take place at receptor level.

Conclusion

This study provided experimental confirmation of the widespread idea that constituents in non-perceptible concentrations influence the perceived quality of mixtures of odorous compounds.

Implications

Moreover, this type of olfactory model may improve our understanding of combinatorial olfactory encoding at the peripheral level.

中文翻译：

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阈下浓度的2,4,6-三氯苯甲醚掩盖了几种嗅觉成分

介绍

在葡萄酒缺陷中，2,4,6-三氯茴香醚对葡萄酒的感官有特定影响。2,4,6-三氯茴香醚除了给葡萄酒带来难闻的气味外，还具有掩盖效果。在这项研究中，在阈下和阈上浓度下测试了2,4,6-三氯茴香醚掩盖作用的特异性和有效性。还研究了二元混合物的简化模型，以对该现象进行深入分析。

方法

所使用的技术包括感官分析（气味分析），心理物理测试（阈值测量和三角测试），化学分析（GC-MS）以及单/双胆碱刺激范式，以检验外围相互作用的假设。

结果

结果表明，即使在阈下浓度下，TCA对一系列芳香香精也具有掩盖作用。但是，它们也显示出2,4,6-三氯茴香醚对气味特异性的抵消作用。还讨论了这种掩蔽效应的起源。结果表明，可以假定这种相互作用发生在受体水平。

结论

这项研究提供了实验性证据，证实了以下广泛观念：浓度不可感知的成分会影响气味化合物混合物的感知质量。

含义

而且，这种类型的嗅觉模型可以改善我们对外围水平上组合嗅觉编码的理解。