Identification of metallic-smelling 1-octen-3-one and 1-nonen-3-one from solutions of ferrous sulfate.
Identification of metallic-smelling 1-octen-3-one and 1-nonen-3-one from solutions of ferrous sulfate.
复制标题
从硫酸亚铁溶液中鉴定具有金属气味的 1-辛烯-3-酮和 1-壬烯-3-酮。
DOI：
10.1021/jf0511594
复制
发表时间：
2005
影响因子：
6.1
通讯作者：
Acree,TerryE
中科院分区：
文献类型：
--
作者：
Lubran,MerylB;Lawless,HarryT;Lavin,Edward;Acree,TerryE
硫酸亚铁（FeSO4）溶液的味觉阈值测试已被假定的气味剂的存在所混淆。为了检测从这些溶液中释放的气味剂的存在，采用固相微萃取（SPME）收集feso4溶液上方顶空中的挥发物。气相色谱-在三个时间段（1、5和16小时）和两种温度（22和37°C）下收集的样品的气味测定显示，顶部空间中存在几种金属气味。使用真实的标准，两种气味剂最终确定为1-辛烯-3- 1和1-壬烯-3- 1。其他气味的痕量水平也被检测到，但稀释实验表明，1-壬烯-3- 1比从溶液中释放的任何其他气味至少强10倍。1-辛烯-3- 1和1-壬烯-3- 1是在FeSO4溶液阈值测试中观察到的金属气味响应的优秀候选者。关键词：金属味；硫酸亚铁;脂质氧化
Taste threshold tests of ferrous sulfate (FeSO4) solutions have been confounded by the presence of putative odorants. To detect the presence of odorants released from these solutions solid-phase microextraction (SPME) was used to collect volatiles in the headspace above FeSO4solutions. Gas chromatography−olfactometry of samples collected over three time periods (1, 5, and 16 h) and at two temperatures (22 and 37 °C) revealed the presence of several metallic-smelling odorants in the headspace. Using authentic standards, two of the odorants were conclusively identified as 1-octen-3-one and 1-nonen-3-one. Trace levels of other odorants were also detected, but dilution experiments indicated that 1-nonen-3-one was at least 10 times more potent than anything else released from the solutions. 1-Octen-3-one and 1-nonen-3-one are excellent candidates for the metallic odor responses often observed in threshold testing of solutions of FeSO4.Keywords: Metallic taste; ferrous sulfate; lipid oxidation