Determining Ultra-Low Organic Molecular Odor Thresholds in Air Helps Identify the Most Potent Fungal Aroma Compound
作者:Fabio F. Brescia、Jan Passinger、Raffael C. Wende、Peter R. Schreiner、Holger Zorn、Marco A. Fraatz
DOI:10.1021/acs.jafc.3c08438
日期:2024.4.3
method for the determination of odor thresholds in air is reported. As model substrates for this novel approach, naturally occurring substances (R)-1-p-menthene-8-thiol as well as (3S,3aS,6R,7aS)-3,6-dimethyl-3a,4,5,6,7,7a-hexahydro-3H-1-benzofuran-2-one were used. The latter compound was synthesized from (−)-isopulegol and exhibited an extremely low odor recognition threshold of 1.9 × 10–6 ng L–1 air, the
气味阈值的确定可以在包括空气在内的各种基质中进行,并作为比较有气味化合物效力的参数。通常,空气中的气味阈值通过气相色谱-嗅觉 (GC-O) 确定,并参考内标,最常见的是 ( E )-dec-2-enal。本文报道了一种用于测定空气中气味阈值的直接气相色谱-火焰离子化检测器-嗅觉分析方法。作为这种新方法的模型底物,天然存在的物质 ( R )-1- p -menthene-8-thiol 以及 (3 S ,3a S ,6 R ,7a S )-3,6-二甲基-3a,4使用,5,6,7,7a-六氢-3H -1-苯并呋喃-2-酮。后一种化合物由 (−)-异胡薄荷醇合成,具有 1.9 × 10 –6 ng L –1空气的极低气味识别阈值,这是迄今为止报道的真菌香气化合物的最低值。