Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, Department of Chemistry, Wuhan University, Wuhan 430072, China.
J Agric Food Chem. 2011 Dec 28;59(24):12794-800. doi: 10.1021/jf203973s. Epub 2011 Nov 29.
In this study, magnetic multiwalled carbon nanotubes were fabricated by a simple method and applied to magnetic solid-phase extraction (MSPE) of eight heavy molecular weight polycyclic aromatic hydrocarbons (PAHs) including chrysene, benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3-cd]pyrene, dibenzo[a,h]anthracene and benzo[g,h,i]perylene from edible oil samples. Several parameters affecting the extraction efficiency were investigated, including the type and volume of desorption solvent, extraction and desorption time, washing solution and the amount of sorbent. Under the optimized conditions, a simple and effective method for the determination of PAHs in edible oils was developed by coupling with gas chromatography-mass spectrometry (GC-MS). The whole pretreatment process was rapid, and it can be accomplished within 10 min. The limits of quantitation for the target PAHs were found to be 0.34-2.9 ng/g. The recoveries in oil sample were in the range 87.8-122.3% with the RSDs less than 6.8% (intraday) and 9.6% (interday). This method was successfully applied to the analysis of PAHs in seven kinds of edible oils from local markets.
在这项研究中，通过一种简单的方法制备了磁性多壁碳纳米管，并将其应用于从食用油样品中磁性固相萃取（MSPE）八种高分子量多环芳烃（PAHs），包括䓛、苯并[a]蒽、苯并[b]荧蒽、苯并[k]荧蒽、苯并[a]芘、茚并[1,2,3-cd]芘、二苯并[a,h]蒽和苯并[g,h,i]苝。研究了影响萃取效率的几个参数，包括解吸溶剂的类型和体积、萃取和解吸时间、洗涤溶液和吸附剂的用量。在优化条件下，通过与气相色谱-质谱联用（GC-MS）相结合，开发了一种简单有效的食用油中 PAHs 测定方法。整个预处理过程快速，可在 10 分钟内完成。目标 PAHs 的定量限为 0.34-2.9 ng/g。在油样中的回收率在 87.8-122.3%范围内，日内和日间相对标准偏差（RSD）均小于 6.8%和 9.6%。该方法成功应用于当地市场七种食用油中 PAHs 的分析。
