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SFC‒MS‒MS法测定烟草中的游离态类脂成分

Determination of free lipid components in tobacco by SFC-MS-MS

  • 摘要: 为同时、准确、快速测定烟草中多种类脂成分,优化并建立了一种超临界流体色谱‒串联质谱(SFC‒MS‒MS)法测定烟叶中多种游离态类脂成分的方法。通过对样品预处理条件及色谱柱、流动相、改性剂和离子源等仪器参数的系统优化,实现了烟草中α‒西柏三烯二醇、β‒西柏三烯二醇、α‒维生素E、α‒生育三烯酚、β‒谷甾醇、菜油甾醇、菜籽甾醇、胆固醇、豆甾醇、麦角甾醇、羊毛甾醇、角鲨烯、赖百当‒13‒烯‒8,15‒二醇、顺式‒冷杉醇和茄尼醇15种游离态类脂成分的准确测定。结果表明:①所有15种类脂成分在检测范围内线性良好,相关系数(r)均大于0.99。②不同加标水平下的回收率为81.6%~114.9%,日内RSDs为1.79%~6.29%,日间RSDs为1.74%~7.29%,检出限为0.000 87~0.26 μg/mL,定量限为0.002 9~0.85 μg/mL。③将该方法应用于不同类型烟草样品的测定,均成功检出目标游离态类脂成分。与传统方法相比,该方法基质兼容性强、分离效率和灵敏度高,有机溶剂的用量少,绿色环保,可以实现烟草中多种游离态类脂成分的同时、准确、快速定量检测。

     

    Abstract: An SFC-MS-MS method was optimized and established for the simultaneous, accurate and rapid determination of free lipid components in tobacco. Through systematic optimization of sample-pretreatment conditions and instrumental parameters, including column type, mobile phase, modifier, ion source, etc., 15 lipid components were separated efficiently and determined, involving α-cembra-trienediol, β-cembratrienediol, α-tocopherol, α-tocotrienol, β-sitosterol, campesterol, brassicasterol, cholesterol, stigmasterol, ergosterol, lanosterol, squalene, labd-13-ene-8,15-diol, cis-abienol and solanesol. The results showed that: 1) All analytes exhibited good linearity within the tested ranges, with all of the correlation coefficients (r) more than 0.99. 2) Recoveries at different spiked levels ranged from 81.6% to 114.9%. Intra- and inter-day RSDs were 1.79%–6.29% and 1.74%–7.29%, respectively. Limits of detection (LODs) and limits of quantification (LOQs) were 0.000 87–0.26 and 0.002 9–0.85 μg/mL, respectively. 3) Application of this method to various tobacco samples showed that this method could successfully detect the target lipid components in different types of tobacco sample. Compared with the traditional methods, this method exhibited strong matrix compatibility, high separation efficiency and sensitivity. It reduced organic solvent consumption and was eco-friendly. It could achieve simultaneous, accurate and rapid quantitative determination of many free lipid components in tobacco.

     

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