食用菌油中多元素的质谱分析

发布时间：2018-03-07 22:34

本文选题：食用菌油　切入点：煤油　出处：《食品科学》2016年24期 　论文类型：期刊论文

【摘要】：采用煤油稀释食用菌油,建立电感耦合等离子体质谱法直接进样测定其中多元素的新方法。针对煤油具有较低饱和蒸汽压和较好的热稳定性,使用窄内径进样炬管并选择高温等离子体工作条件确保低电离效率元素获得了较好的分析信号强度,同时维持了等离子体炬焰的稳定;采用碰撞/反应池消除了由有机基质中碳、氢元素形成的多原子离子所造成的高背景信号,选择在载气中通入体积分数20%氧气以防止有机溶剂直接进行分析时形成积碳阻碍质谱分析通道。研究表明,方法的线性关系良好,26个元素的线性相关系数不小于0.999 8;检出限在0.018~92.27 ng/g范围内;精密度高,相对标准偏差(n=11)不大于4.4%;准确性好,各元素的回收率为92.60%~106.16%。该方法简单,适用于不同食用菌油中无机元素的质量控制和安全评估的要求。
[Abstract]:By using kerosene to dilute edible mushroom oil, a new method for direct injection of multi-elements by inductively coupled plasma mass spectrometry (ICP-MS) was established. The kerosene has low saturated vapor pressure and good thermal stability. Using the narrow inner diameter sampling torch and selecting the working conditions of high temperature plasma can ensure the low ionization efficiency element to obtain a good analytical signal strength and maintain the stability of the plasma torch flame at the same time. The collision / reaction cell was used to eliminate the high background signal caused by polyatomic ions formed by carbon and hydrogen elements in the organic matrix. In order to prevent the formation of carbon deposition and block mass spectrometric analysis channel when organic solvent is analyzed directly by selecting the integral number of 20% oxygen in carrier gas, the study shows that, The linear relationship of the method is good, the linear correlation coefficient of 26 elements is not less than 0.999 8; the detection limit is 0.018 ~ 92.27 ng/g; the precision is high, and the relative standard deviation is not more than 4.4; the accuracy is good, the recovery rate of each element is 92.60 and 106.16.The method is simple, Suitable for quality control and safety assessment of inorganic elements in different edible mushroom oils.
【作者单位】：湖南工学院材料与化学工程学院;长江师范学院化学化工学院;
【基金】：国家自然科学基金面上项目(21271187) 重庆市科委前沿与应用基础研究项目(cstc2015jcyjA10053) 重庆市教委重点科研项目(KJ1401209) 湖南省教育厅重点科研项目(14A035)
【分类号】：TS227;O657.63

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