Department of Analytical Chemistry, Faculty of Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100 Murcia, Spain.
Department of Analytical Chemistry, Faculty of Chemistry, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, E-30100 Murcia, Spain.
Food Chem. 2016 Jan 1;190:324-330. doi: 10.1016/j.foodchem.2015.05.106. Epub 2015 May 27.
The concentration of twelve polycyclic aromatic hydrocarbons (PAHs), included in the list of priority pollutants, in different spirits has been obtained by means of a rapid and sensitive method based on gas chromatography and mass spectrometry (GC-MS). The environmentally friendly ultrasound-assisted emulsification microextraction (USAEME) technique allowed the easy and effective preconcentration of the PAHs from the sample matrices. Several parameters affecting the extraction efficiency, such as the nature and volume of the extractant solvent, and the addition of salt, as well as the sonication parameters were investigated and optimized. The absence of matrix effects under the optimized conditions allowed the sample quantification against aqueous standards. Detection limits ranged between 1.8 and 6.3 ng L(-1), depending on the compound. Different spirit samples were successfully analyzed using the proposed method, and contents of up to 0.9 μg L(-1) were found. Relative recoveries at fortified levels of 0.2 and 1 μg L(-1) were in the range 84-118%.
采用基于气相色谱-质谱联用（GC-MS）的快速灵敏方法，测定了优先污染物名单中 12 种多环芳烃（PAHs）在不同酒类中的浓度。环保型超声辅助乳化微萃取（USAEME）技术可方便有效地从样品基质中预浓缩 PAHs。考察并优化了萃取效率的多个参数，如萃取溶剂的性质和体积、盐的添加以及超声参数。在优化条件下不存在基质效应，可通过与水溶液标准品对比对样品进行定量检测。检出限在 1.8 到 6.3ng/L 之间，取决于化合物。使用所提出的方法成功分析了不同酒类样品，检出浓度高达 0.9μg/L。在 0.2 和 1μg/L 的加标水平下，相对回收率在 84-118%范围内。
