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首页> 外文期刊>Analytical methods >Polymer monolith microextraction coupled to microwave plasma torch–atomic emission spectrometry for the determination of Nd, Eu and Yb in tea samples
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Polymer monolith microextraction coupled to microwave plasma torch–atomic emission spectrometry for the determination of Nd, Eu and Yb in tea samples

机译：聚合物整体微萃取-微波等离子体炬-原子发射光谱法测定茶叶样品中的钕，Eu和Y

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摘要

A reliable and rapid method based on polymer monolith microextraction (PMME) combined with microwave plasma torch-atomic emission spectrometry (MPT-AES) was established for the determination of trace rare earth elements (REEs), Nd (light), Eu (medium) and Yb (heavy). Several parameters affecting extraction efficiency, including sample pH, sample flow rate, sample volume, eluent concentration, eluent flow rate and eluent volume, were investigated and optimized in detail. Under the optimum conditions, the limits of detection (n = 7) and limits of quantification (n = 7) for Nd, Eu and Yb (based on a 0.8 mL sample volume) were determined to be 1.07, 0.83 and 1.47 μg L?1, and 3.57, 2.78 and 4.90 μg L?1, respectively. The enrichment factors for Nd, Eu and Yb (5 μg mL?1) were determined to be 15.1, 12.8 and 12.5, respectively, with relative standard deviations (n = 7) of 5.10%, 5.43% and 7.84%. The proposed method has been successfully applied to the analysis of Nd, Eu and Yb in tea samples with a recovery range of 81.2–109.2%...
机译：建立了一种基于聚合物整体微萃取（PMME）结合微波等离子体炬炬原子发射光谱法（MPT-AES）的可靠，快速的方法，用于测定痕量稀土元素（REE），Nd（光），Eu（中）和Yb（重）。研究并优化了影响萃取效率的几个参数，包括样品pH，样品流速，样品体积，洗脱液浓度，洗脱液流速和洗脱液体积。在最佳条件下，Nd，Eu和Yb（基于0.8 mL样品体积）的检出限（n = 7）和定量限（n = 7）被确定为1.07、0.83和1.47μgL？ 1和3.57、2.78和4.90μgL·1。 Nd，Eu和Yb（5μgmL？1）的富集系数分别确定为15.1、12.8和12.5，相对标准偏差（n = 7）为5.10％，5.43％和7.84％。该方法已成功应用于茶叶样品中Nd，Eu和Yb的分析，回收率81.2–109.2％...

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