电感耦合等离子体质谱法测定玫瑰花花瓣及花酱中15种金属元素含量

Determination of 15 metal elements in rose petals and jam by inductively coupled plasma-mass spectrometry

中文关键词:  玫瑰花瓣  玫瑰花酱  微波消解  电感耦合等离子体质谱法  金属元素

英文关键词:rose petals  rose jam  microwave digestion  inductively coupled plasma-mass spectrometry  metal elements

中文摘要:

      目的 建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)测定玫瑰花花瓣及花酱中15种金属元素含量的分析方法。方法 样品经微波消解后, 对仪器工作条件以及内标元素的选择进行优化, 用标准模式及动能歧视消除(kinetic energy discrimination, KED)模式进行分析, 采用电感耦合等离子体质谱法对15种金属元素的含量进行测定。结果 各金属元素在各自的浓度范围内线性关系良好(r2>0.999) ; 检出限为 0.020~5.633 μg/L; 精密度、稳定性、重复性的相对标准偏差(relative standard deviation, RSD) 均小于4%; 平均回收率达 92.0%~131.2%, RSD为0.6%~3.5%。结论 该方法操作简便、分析快速、灵敏度高、结果准确、适用于玫瑰花与它花酱中金属元素含量的测定。

英文摘要:

      Objective To establish a method for determination of 15 metal elements in rose petals and rose jam by inductively coupled plasma mass spectrometry (ICP-MS). Methods After samples were digested by microwave, mass spectrometer conditions and selection of internal standard were optimized, 15 metal elements content was analyzed by using standard and kinetic energy discrimination (KED) modes and determined by ICP-MS. Results The linear relationship of each metal element was good in each concentration range (r2> 0.999); the limit of detection was 0.0205.633 μg/L; the relative standard deviations (RSDs) of the precision, stability, and reproducibility were less than 4%. The recovery rate was 92.0%131.2%, and the RSD was 0.6%3.5%. Conclusion This method provides quick response, high sensitivity, and reliable testing results, which is suitable for the determination of metal elements in rose petals and rose jam.