改进的氧瓶燃烧法结合电感耦合等离子体质谱快速测定茶叶样品中的稀土元素含量

发布时间：2018-04-25 17:52

本文选题：氧瓶燃烧 + 电感耦合等离子体质谱　；参考：《分析化学》2016年09期

【摘要】：建立了电感耦合等离子体质谱法快速测定茶叶中Y~Lu共15种稀土元素的新方法,样品处理基于改进的氧瓶燃烧法,以涂覆甘油的石英布代替滤纸作为引燃和燃烧载体,在500 m L容积燃烧瓶中实现了0.1 g样品量的有氧完全燃烧。系统优化了样品处理关键参数,以5 m L 4%HNO_3+1%HF(V/V)组合试剂超声提取燃烧残渣1 min,稀土元素回收率大于90%,样品总处理周期小于3 min。6次样品平行测定值的相对标准偏差(RSD)在2.7%~5.5%之间,方法检出限(3σ)在0.001~0.006 mg/kg之间。采用本方法对3种茶叶标准参考物质进行分析,测定结果和标准值吻合良好。
[Abstract]:A new method for rapid determination of 15 rare earth elements in tea by inductively coupled plasma mass spectrometry (ICP-MS) was established. Based on the improved oxygen flask combustion method, quartz cloth coated with glycerol was used as ignition and combustion carrier instead of filter paper. Complete aerobic combustion of 0.1 g sample was realized in 500 mL volumetric combustion bottle. The system optimized the key parameters of sample treatment. Ultrasonic extraction of combustion residue with 5 mL 4%HNO_3 1 HFV / V combination reagent was used for 1 min. The recovery rate of rare earth elements was more than 90%. The relative standard deviation (RSD) of the total sample treatment period less than 3 min.6 times was between 2. 7% and 5. 5%. Methods the detection limit was between 0. 001 and 0. 006 mg/kg. Three reference materials of tea were analyzed by this method, and the results were in good agreement with the standard values.
【作者单位】：武汉工程大学材料科学与工程学院;中国科学院长春应用化学研究所电分析化学国家重点实验室;东北师范大学物理学院;
【基金】：国家自然科学基金项目(No.21275138) 吉林省科技创新中心(大型科学仪器装备提升)项目(No.20150623001TC)资助~~
【分类号】：O657.63;TS272.7

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