Predicting organoleptic scores of sub-ppm flavour notes. Part 1. Theoretical and experimental details
Predicting organoleptic scores of sub-ppm flavour notes. Part 1. Theoretical and experimental details
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DOI：
10.1039/a804018d
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发表时间：
1998-10-01
期刊：
影响因子：
4.2
通讯作者：
Gardner, JW
中科院分区：
文献类型：
--
作者：
Pearce, TC;Gardner, JW
大多数现有的电子鼻系统具有有限的商业应用，因为它们仅提供所研究的味道的相对描述，而不是针对通用标准的描述。然而，一套普遍接受的标准，风味描述的发展一直是有问题的，由于缺乏任何全面的模型与气味的分子结构与其风味的影响，在感知的行为。相反，工业界倾向于为特定的消费品开发自己的风味模型（风味术语系统），这些模型基于特定食品、化妆品或饮料的实践经验。我们在这里报告的新应用化学多传感器阵列的感官风味笔记的预测，根据特定的术语系统，适合描述和沟通特定的味道。提出了一种新的气味映射方案，可普遍应用于多传感器阵列，并提供更详细的表征气味质量比目前可实现的。作为我们研究的一部分，流动注射分析仪（FIA）系统已经开发，结合化学和电子硬件由微计算机驱动，以实现准确和独立的控制气味流的温度，流速和流量分布，传感器头温度，和采样时间。在FIA系统内使用24个导电聚合物传感器（11种不同类型）的阵列，给出低于7%的总体实验变异系数。这种气味映射技术的应用证明了通过实验研究的方式，使用这里报道的FIA系统。本研究的细节在第一部分中给出，数据的计算分析在第二部分中进行（T。C.皮尔斯和J. W. Gardner，Analyst，1998，123，2057.
Most existing electronic nose systems have limited commercial application since they only provide a relative description of the flavour under investigation, rather than one against a universal standard. However, the development of a set of universally accepted standards for flavour description has been problematic due to the lack of any comprehensive model relating the molecular structure of an odorant with its flavour-impact during the act of perception. Instead, industries have tended to develop their own flavour models (flavour terminology systems) for specific consumer products that are based upon practical experience of a particular foodstuff, cosmetic, or beverage. We report here on the novel application of chemical multi-sensor arrays to the prediction of organoleptic flavour notes, as defined under a specific terminology system suitable for describing and communicating specific flavours. A novel odour mapping scheme is proposed that may be applied generally to multi-sensor arrays and provides more detailed characterisation of odour quality than is currently achievable. As part of our study, a flow injection analyser (FIA) system has been developed that combines chemical and electronic hardware driven by a microcomputer to achieve accurate and independent control over odour-stream temperature, flow-rate and flow profile, sensor head temperature, and sample times. An array of 24 conducting polymer sensors (11 different types) is used within the FIA system giving an overall experimental coefficient of variation below 7%. The application of this odour mapping technique is demonstrated by way of an experimental study, using the FIA system reported here. The details for this study are given in Part 1, and the computational analysis of the data is carried out in Part 2 (T. C. Pearce and J. W. Gardner, Analyst, 1998, 123, 2057.