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痕量稀土元素
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  trace rare earth elements
     C18 Silica Gel Microcolumn Preconcentration and ICP-AES Determination of Trace Rare Earth Elements
     C_(18)键合硅胶微柱预富集ICP-AES测定痕量稀土元素
     Determination and distribution characteristic of trace rare earth elements in pearls by ICP-MS
     珍珠中痕量稀土元素的ICP-MS测定及其分布特性
短句来源
     Determination of 15 Trace Rare Earth Elements in Tea by Microwave Acid Digestion ICP MS
     微波溶样ICP-MS直接测定茶叶中15种痕量稀土元素
短句来源
     Determination of 15 Trace Rare Earth Elements in Wheat by Microwave Digestion ICP-MS
     微波溶样ICP—MS法测定小麦的粒、茎、穗和叶中15种痕量稀土元素
短句来源
     DETERMINATION OF 15 TRACE RARE EARTH ELEMENTS OF SOIL SAMPLES BY ICP-MS
     偏硼酸锂熔样ICP-MS法测定土壤样品中15种痕量稀土元素
短句来源
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  trace ree
     Simultaneous Determination of 15 Trace REE in Rocks by Emission Spectrometry
     发射光谱法测定岩石中十五个痕量稀土元素
短句来源
     Simulteneous Determination of 15 Trace REE in Rocks by Emission Spectrometry
     发射光谱法测定岩石中十五个痕量稀土元素
短句来源
     THE DETERMINATION OF TRACE REE IN GEOLOGICAL SAMPLES BY ICP EMISSION SPECTROMETRY
     ICP发射光谱法测定矿样中痕量稀土元素分量
短句来源
     A Study of Determination of Trace REE in Geological Samples by ICP-MS
     感耦等离子体质谱法测定地质样品中痕量稀土元素的研究
短句来源
  “痕量稀土元素”译为未确定词的双语例句
     Determination of Rare Earth Elements in Rocks Fused with Li_2B_4O_7 by Laser Ablation Inductively Coupled Plasma Mass Spectrometer
     Li_2B_4O_7,熔融玻璃LA-ICP-MS测定岩石中痕量稀土元素
     Determination of Forteen Rare Earths Impurities in High Purity Nd_(2)O_3 by P_(507) Extraction Chromatography Separation-Spark Source Mass Spectrometry
     P_(507)萃淋树脂分离—火花源质谱法定量分析高纯Nd_(2)O_3中痕量稀土元素
短句来源
     The recovery and recrystallization of high pure Ag (99 999%) and Ag-RE (RE=21ppm Ce, 16ppm Eu and 20ppm Gd) alloys were studied.
     研究了承受不同冷变形量的高纯Ag(99999%)和含有痕量稀土元素Ce(21ppm)、Eu(16ppm)、Gd(20ppm)的Ag-RE合金在23℃和50℃的回复过程中力学性能、电学性能、晶格畸变等性能的变化。
短句来源
     The detection limits of the REEs ranged from0.17ng·L -1 (Yb)to1.46ng·L -1 (La)and the relative standard deviations were1.2%~11.7%(n=3). The developed method has been used for the determinaˉtion of REEs in Yangze estuarine water samples.
     方法的分析流程空白为0.04(Tb)~10.17(La)ng·L -1,检出限在0.17(Yb)~1.46(La)ng·L-1之间 ,精密度 (RSD ,n=3)小于11.7 % ,可满足河口淡水和海水样品中的痕量稀土元素定量分析的要求
短句来源
     A sensitive and rapid method for electrothermal vaporization inductively coupled plasma atomic emission spectrometry determination of rare earth elements(Sc, Y, La and Yb) after separation/preconcentration by a micro column packed with immobilized 1 phenyl 3 methyl 4 bonzoyl 5 pyrazone on microcrystalline naphthalene has been developed.
     报道了微晶萘负载 1 -苯基 -3-甲基 -4 -苯甲酰基 -5-吡唑酮 ( PMBP)微型柱分离预富集与电热蒸发 -电感耦合等离子体原子发射光谱 ( ETV-ICP-AES)联用测定痕量稀土元素 ( Sc,Y,La和 Yb)的新方法 .
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  trace rare earth elements
Simultaneous determination of trace rare earth elements and other elements in high purity terbium oxide (Tb4O7) by ICP-AES after
      
This article describes a new method for the simultaneous determination of trace rare earth elements (REEs) and non rare earth elements (NREEs) in high purity terbium oxide by ICP-AES after HPLC separation using P507 resin.
      
Emission-spectrometric determination of trace rare earth elements in europium oxide
      
Spectrographic determination of trace rare earth elements in high purity thorium
      
Direct determination of trace rare earth elements in high purity Y2O3 using fluorination assisted electrothermal vaporization
      
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  trace ree
On the basis of the experimental data, the activity coefficients of the trace REE can be approximated by a model based on trace cation/cationic vacancy binary solid solution, taking into account association phenomena between them as well.
      
  rare earth elements determination
Rare earth elements determination and distribution patterns in sediments of a polluted marine environment by instrumental neutro
      


The superpositional interference resulted from the ions of carbide andoxide of barium and rare earths causes significant errors in determining REtrace by spark source mass spectrometry when graphite is used as conductivepowder. In the present paper a mathematial correction procedure, whicheliminates the interference by using a coupled equation for intensity of singleexposure, is described. Its reliability has been verified by more than 20Chinese geological standard samples.

在以石墨为导体的火花源质谱法测定地质样品中的痕量稀土元素时,由于钡和稀土元素产生的氧化物,碳化物离子谱线迭加在稀土元素谱线上,从而影响分析结果。本文对消除这种干扰的数学校正法进行了讨论。这种校正法是通过解单次曝光谱线强度值所组成的方程组而实现的。这种方法已用地质矿产部的地质标样进行了核对。

On the basis of the pre-concentra-tion with a columnar chromatographicextractie resin p507 and the excitationwith crystal-controlled running genera-tor ICP,The method is used to diter-mine microamount REE separability.Thedetection limits of each REE is from0. 01 to 1 ppm.and the relative stan-dard deviation range is from 2% to5% lever.This method results in be-tter accuracy and precission,fast analy-tical processing and no desolvation.Themethod is suitable to determine mi-croamount REE in geological samples.

本文介绍了用萃取色谱(P507) 法预富集,它激式ICP 发射光谱法测定地质样品中15个稀土元素的方法。各稀土元素的检测限为0. 01-1PPm,方法精密度2-5%。实测表明准确度好,分析流程较快,不去溶,一次摄谱可同时测定15个稀土元素,适合于测定多种地质样品中痕量稀土元素

The PMBP-polyurethane method foam for extracting trace RE in bau xite has been studied. It has been experimentally found that when 0.3g polyurethane foam loaded PMPB is immersed in 5.0mL sample solution at pH2.5for 9h, quantitative extraction of RE is achived. Ash the polyure thane foam with RE at 300℃, mix ashed residue with potassium chloride as spectral buffer, the RE contents in the mixture are determined by AES. The recoveryiex of RE is from 90 to 112%. The detection limits range from 0.5 to 387ppm with...

The PMBP-polyurethane method foam for extracting trace RE in bau xite has been studied. It has been experimentally found that when 0.3g polyurethane foam loaded PMPB is immersed in 5.0mL sample solution at pH2.5for 9h, quantitative extraction of RE is achived. Ash the polyure thane foam with RE at 300℃, mix ashed residue with potassium chloride as spectral buffer, the RE contents in the mixture are determined by AES. The recoveryiex of RE is from 90 to 112%. The detection limits range from 0.5 to 387ppm with RSD, 12—28%.

本文研究了PMBP—泡塑对铝土矿中15个痕量稀土元素的萃取。确定0.3克负载泡塑在50毫升pH2.5的水相介质中萃取9小时可达平衡。稀土元素回收率9 0.0—111.8%.将泡塑灰化解脱,其灰分以发射光谱法测定.共存离子铁、铝、硅对测定存在严重影响,但本法流程可消除此影响。稀土元素检出限0.5—387ppb,以不同方法对本法结果作了对照。用一个铝土矿平行测定11—14次,其RSD除镨、铽为23.3%,28.3%外,其余均在12.0—17.3%之间。

 
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