有许多方法用来监测饮用水以检测气味 水分配前的化合物（Mallevialle和Suffet，1987；Dietrich等人。， 2004). 由于人类的鼻子非常敏感，感官方法更有效。而且 快速的人类感官使公用事业公司能够更早地采取预防措施。风味简介 分析（FPA，标准方法2170）是一种常用方法。食品工业 20世纪50年代初开始使用FPA（Caircross和Sjostrom，1950年），后来开始使用水 行业采用了这种方法（Suffet al.，1988）。 对于FPA，样品以杯子或标准烧瓶呈现。品尝和/或 通过嗅觉，专家组成员对样本进行评分（描述词和强度）。 然后是专家组 讨论并就评级达成共识。使用七分制:1= 阈值和最大为12的偶数用作强度等级（Krasner 等人，1985年；Suffet等人，1999年）。FPA需要一个训练有素的专家组和一个有品味的人 标准已经建立，FPA培训没有气味标准。强度 根据学习到的味觉强度报告气味。这个步骤不是很精确。如果 有一个气味标准，该小组将得到更好的培训，结果会更好 更准确。 找到一个气味标准并不容易。理想的气味标准应该有令人愉快的气味 大多数人都能检测到气味，在采样过程中气味稳定， 对于每个面板都是可复制的，不会引起嗅觉缺失，并且应该有 线性韦伯-费希纳图。韦伯-费希纳图展示了 气味的对数浓度和气味强度。当直线 这意味着气味强度随着溶液浓度的增加而增加 对数线性时尚。己醛，有草的气味，常在饮用水中发现 水是一种很好的气味标准。本研究调查了其适用性 己醛是一种气味标准。在感官实验中，使用带塞子的500ml宽口锥形烧瓶 习惯于己醛溶液在Nanopure®水中以1,5,10,25,50,100,500， 以及1000微克/升的浓度。所有的烧瓶都经过清洗和漂洗，直到没有异味。 为了进行分析，使用了侧面带有隔板孔附件的类似烧瓶 习惯于固相微萃取（SPME）和气相色谱-质谱联用 光谱仪用于测量烧瓶中己醛的顶空浓度 随着时间的推移，在嗅了几下之后。包括10个参考文献，见图。

There are many methods used to monitor drinking water to detect odorous compounds before the water is distributed (Mallevialle and Suffet, 1987; Dietrich et al., 2004). The sensory methods are more effective as the human nose is very sensitive. Also quick human senses enable the utilities to take precautions earlier. The flavor profile analysis (FPA, Standard Method 2170) is a commonly used method. The food industry started using FPA early 1950s (Caircross and Sjostrom, 1950) and later the water industry adopted the method (Suffet et al., 1988). For FPA, samples are presented in cups or standard flasks. After tasting and/or smelling, panelists rate the samples (descriptor(s) and intensity(ies)). Then the panel discusses and comes to a consensus about the ratings. A seven-point scale is used: 1 = threshold value and the even numbers up to 12 are used as the intensity ratings (Krasner et al., 1985; Suffet et al., 1999). FPA requires a well-trained panel and although taste standards are well established, FPA training doesn't have an odor standard. Intensity of an odor is reported based on the learned taste intensities. This step is not very precise. If there was an odor standard, the panel would be trained better and the results would be more precise. Finding an odor standard is not easy. The ideal odor standard should have a pleasant smell, should be detected by most of the population, would be stable during sampling, would be reproducible for every panel, would not cause anosmia, and should have a linear Weber-Fechner plot. The Weber-Fechner plots present the relationship between the log concentration of the odorant and the odor intensity. When a straight line is obtained, it means that the odor intensity increases with increasing concentration in a log-linear fashion. Hexanal having a grassy odor and being commonly found in drinking water is a good candidate to be an odor standard. This study investigated the suitability of hexanal to being an odor standard. For the sensory experiments 500 mL wide mouth Erlenmeyer flasks with stoppers were used. Hexanal solutions were prepared in Nanopure® water at 1, 5, 10, 25, 50, 100, 500, and 1000 µg/L concentrations. All of the flasks were washed and rinsed until odor free. For analytical analyses, similar flasks with a septum port attachment on the side were used. Solid phase micro-extraction (SPME) and gas chromatography with mass spectrometer was used to measure the headspace concentration of hexanal in the flasks over time and after a few sniffs. Includes 10 references, figure.