微波消解-电感耦合等离子体质谱法同时测定 橄榄油中的18种金属元素

目的建立微波消解-电感耦合等离子体质谱(ICP-MS)法同时快速测定进口橄榄油中18种微量金属元素(锂、铍、钛、钴、镍、铜、锌、钼、银、镉、锡、锑、钡、汞、铅、铁、锰、砷)的分析方法。方法橄榄油经微波消解进行样品前处理,采用ICP-MS测定,外标法定量。结果本方法测定18种金属元素的线性范围宽,线性关系良好(r0.999),检出限低,各元素的加标回收率在82.3%~110.5%之间,相对标准偏差均小于5%。结论本方法具有简单、快速、灵敏度高、准确度高、回收率高等特点,能够同时对橄榄油中18种元素进行分析。

Simultaneous determination of 18 metal elements in olive oil by microwave digestion-inductively coupled plasma-mass spectrometry

Objective To establish an analysis method for simultaneous determination of 18 trace metal elements (Li, Be, Ti, Co, Ni, Cu, Zn, Mo, Ag, Cd, Ti, Ba, Hg, Pb, Fe, Mn and As) in imported olive oils by microwave digestion-inductively coupled plasma-mass spectrometry (ICP-MS). Methods Olive oil samples were pretreated by microwave digestion and then determined by ICP-MS. The 18 trace metal elements were analyzed quantitatively by external standard method. Results This method had a wide linear range of calibration curves for the determination of 18 metal elements and the linear correlation coefficients were higher than 0.999. The detection limits were lower enough for trace metal elemental analysis. The recoveries for the spiked samples ranged from 82.3% to 110.5% and the relative standard deviations (RSDs) were lower than 5%. Conclusion This method has advantages of simplicity, rapidity, high sensitivity and specificity, high recoveries, and can be used for simultaneous determination of multi-elements in olive oils.