自1981年以来，宾夕法尼亚州费城巴克斯特处理厂为了控制三卤甲烷而减少了游离氯的使用，出现了一个季节性黄瓜风味问题。风味谱分析是指导治疗的唯一工具。1990年期间，沿着特拉华河到坎农斯维尔水库的距离超过250英里（402公里），对黄瓜的气味进行了追踪，并确定引起气味的化合物为反式、2-顺式、6-壬二烯醛。冬季冰层下的藻类生长产生了这种化合物。河上其他使用游离氯进行消毒和最终残留的处理厂从未遇到反式、2-顺式、6-壬二烯醛的问题。因此，巴克斯特工厂增加了氯的使用，以控制黄瓜的风味。对反式、2-顺式、6-壬二烯醛进行了研究，以描述其感官特性和分析检测限。包括24个参考文献和表格。

Since 1981, when the use of free chlorine was curtailed to control trihalomethanes at the Baxter Treatment Plant in Philadelphia, Pa., a seasonal cucumber flavor problem occurred. Flavor profile analysis was the only tool available to guide treatment. During 1990, the cucumber odor was tracked more than 250 mi (402 km) up the Delaware River to the Cannonsville Reservoir, and the odor-causing compound was identified as trans,2-cis,6-nonadienal. Algae growth beneath the winter ice produced the compound. Other treatment plants on the river that used free chlorine for disinfection and a final residual never had a problem with trans,2-cis, 6-nonadienal. Therefore, use of chlorine was increased at the Baxter plant to control the cucumber flavor. Studies were conducted on trans,2-cis,6-nonadienal to describe its sensory characteristics and analytical detection limit. Includes 24 references, tables.