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稀土杂质

稀土杂质的相关文献在1990年到2022年内共计115篇,主要集中在化学、金属学与金属工艺、无线电电子学、电信技术 等领域,其中期刊论文75篇、会议论文21篇、专利文献46595篇;相关期刊32种,包括理化检验-化学分册、岩矿测试、江西冶金等; 相关会议11种,包括第十三届全国稀土化学分析学术研讨会、2008年北京光谱学术年会、第十二届全国稀土元素分析化学学术报告暨研讨会等;稀土杂质的相关文献由233位作者贡献,包括伍星、刘湘生、李继东等。

稀土杂质—发文量

期刊论文>

论文:75 占比:0.16%

会议论文>

论文:21 占比:0.04%

专利文献>

论文:46595 占比:99.79%

总计:46691篇

稀土杂质—发文趋势图

稀土杂质

-研究学者

  • 伍星
  • 刘湘生
  • 李继东
  • 郑永章
  • 李冰
  • 尹明
  • 张岩
  • 柳凤粉
  • 蒲池政直
  • 蔡绍勤
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 梁玉仪; 李兵; 孔翔飞; 秦文忠; 胡振光
    • 摘要: 使用三重串联四级杆-电感耦合等离子质谱法(ICP-MS/MS)测定高纯氧化钇的14种稀土杂质元素。在最佳工作条件下,确定了样品的分析模式为TQ-He,对比考察了氦气和氧气作为反应气时对检出限以及等效背景浓度(BEC)的影响,能有限地消除氧化钇基体中产生的多原子离子干扰。选择碰撞模式对干扰的消除,能达到准确测定高纯钇中痕量稀土杂质的目的。实验测得了在氦气模式下,稀土元素的检出限的范围是0.007~0.89μg/L,加标回收率为97.93%~104.86%,相对标准偏差(RSD)为0.78%~3.39%。该方法简单、精密度高,可以满足纯度为99.999%~99.9999%及以上的高纯氧化钇中14种稀土杂质元素的直接测定。
    • 唐碧玉; 施意华; 邱丽
    • 摘要: The yttrium-iron alloy sample was treated by nitric acid-hydrogen peroxide system.103Rh and 185Re were selected as internal standard elements for the compensation and correction of matrix effect and meas-uring signal in 0.3 mol/L nitric acid as determination medium.The determination of rare earth impurity el-ements in yttrium-iron alloy by inductively coupled plasma mass spectrometry(ICP-MS)was realized.The mass spectrometry interference was eliminated by selecting proper isotopes and interference correction equation.The dilution factor was 2000.In other words,the mass concentration of matrix was controlled at 0.5 mg/mL to eliminate the influence of matrix effect.Under the optimized experimental conditions,the linear correlation coefficients of calibration curves for 14 rare earth elements were all higher than 0.9999. The detection limits of elements were between 0.003 μg/L and 0.020 μg/L.The experimental method was applied for the determination of rare earth impurities in yttrium-iron alloy sample.The relative standard deviations(RSD,n=11)of determination results were between 0.97% and 6.5%,and the spiked recov-eries were between 96% and 104%.The yttrium-iron alloy sample was determined according to the experi-mental method.Meanwhile,the inductively coupled plasma atomic emission spectrometry(ICP-AES) combined with matrix matching method was also adopted for comparison.The determination results of two methods were basically consistent.%采用硝酸-双氧水处理钇铁合金样品,以0.3 mol/L硝酸为测定介质,选用103Rh和185Re作为内标元素对基体效应和测量信号进行补偿和校正,实现了电感耦合等离子体质谱法(ICP-M S)对钇铁合金中14种稀土杂质元素的测定.通过选择合适的同位素和干扰校正方程消除了质谱干扰;通过选择稀释因子为2000,即控制基体质量浓度为0.5 mg/mL进行测定消除了基体效应的影响.在优化的实验条件下,14种稀土元素的校准曲线线性相关系数都在0.9999以上,各元素的检出限为0.003~0.020 μg/L.将实验方法应用于钇铁合金样品中稀土杂质的测定,测定结果的相对标准偏差(RSD,n=11)介于0.97% ~6.5% 之间,加标回收率为96% ~104%.采用实验方法对钇铁合金样品进行测定,同时采用基体匹配结合电感耦合等离子体原子发射光谱法(ICP-AES)进行方法对照试验,两种方法测定结果基本一致.
    • 余荣旻
    • 摘要: 利用电感耦合等离子体质谱法(ICP-MS)建立了测定高纯金属钪中15种稀土杂质的分析方法.样品用硝酸溶解后,加入内标元素进行测定,考察了内标元素对测定结果的影响,结果表明,内标元素Cs有效补偿了Sc对待测元素的抑制效应.选择合适的同位素克服了质谱干扰.稀土杂质的测定下限为0.003 9~0.035 ng/g,加标回收率为95.20%~102.80%,相对标准偏差(RSD)为0.82% ~2.53%,方法适于高纯金属钪中稀土杂质的快速测定.
    • 吴希; 刘道斌; 李平; 蒋小岗
    • 摘要: Using high-purity lanthanum oxide as an example, the uncertainty of determination of rare earth impurities in high-purity lanthanum by ICP-AES method in GB/T18115.1-2006 was evaluated.The uncertainty components of the repetition of determination, the calibration curve fitting, the preparation of standard solution, the sample weighing ,the constant volume and the conversion factor were analyzed and evaluated.The results show that the repetition of determination component is 41.38%-72.46%, the calibration curve component is 26.88%-58.29%, the other components are less than 1%, and the expanded uncertainty is 0.0002%-0.0003%.The result of uncertainty evaluation in this paper is consistent with the practical application, and it has a good application value.It can also provide reference for uncertainty evaluation in the determination of other high purity rare earth products in the GB/T18115 series.%以高纯氧化镧为示例,评定了GB/T18115.1-2006中ICP-AES法测定高纯氧化镧中稀土杂质的不确定度.分析并计算了测量重复性、校准曲线线性拟合、标准溶液配制、样品称量、试液定容及换算系数引入的不确定度分量.结果表明:各稀土杂质测量重复性分量所占权重为41.38~72.46%,校准曲线分量所占权重为26.88~58.29%,其余分量均小于1%;且扩展不确定度均在0.0002%~0.0003%之间.本文进行的不确定度评定符合实际,有较好的应用价值,也可为GB/T18115系列标准中其它高纯稀土产品中稀土杂质测定的不确定度评定提供参考.
    • 摘要: 江西理工大学分析测试中心在高纯单一稀土中其它稀土杂质的检测技术获得突破,成为我国仅有的干扰元素不经分离、直接检测高纯单一稀土中其它稀土杂质成分含量的实验室。
    • 张立锋; 张秀艳; 张翼明; 李立刚
    • 摘要: 采用硝酸溶解样品,建立了电感耦合等离子体质谱法(ICP-MS)测定镧镁合金中稀土杂质的含量.选择合适的测定同位素以及选用干扰元素校正方程克服了质谱干扰.对仪器工作条件进行了优化,确定功率为1 100 W,载气流量为0.80 L/min.讨论了测定条件对结果的影响,确定测定介质为1%硝酸,内标元素为Cs,基体浓度小于0.3 mg/mL.方法测定下限为0.006 9~0.046 ng/mL.采用方法对实际样品进行测定,回收率为98%~102%.与电感耦合等离子体发射光谱法(ICP AES)进行方法对照,两种方法测定结果基本一致,相对标准偏差(RSD,n=6)在1.7%~4.5%之间.
    • 刘亮; 周丽萍; 李中玺
    • 摘要: 从同位素的选择、基体效应,内标元素的选择及仪器工作条件等方面对实验参数进行了优化,重点研究了等离子体功率及仪器分辨率的改变对铒基体所形成的氢化物多原子离子干扰的影响.通过提高等离子体功率、改变仪器分辨率及数学方程校正等方法,减少和剔除了ErH对Ho和Tm测定的干扰.实验中选取Cs为内标元素,测定了不同含量的高纯氧化铒样品.分析结果与标准加入法结果进行了比较,之间无显著性差异.
    • 王衍鹏; 龚琦; 李斌
    • 摘要: The spectral interference on the rare earth impurities caused by La, Ce and Yb matrix were investigated Within the spectrum windows of RE impurities, the total number of interfering lines generated by La. Ce and Yb were less than that had ever been reported, and some spectrum lines not yet reported were observed when the concentration of those matrices mcreased. The multicomponent spectral fitting (MSF) could effectively corrected the spectral interference, so the detection limits of the rare earth impurities were improved significantly after the correction, but the detection limits did not yet reach the level in the absence of La,Ce and Yb. The permissible mass concentration of matrix wass 1 000~2 000 μg/mL when the impurity concentration was 0. 100 μg/mL. The concentrations were accordingly decreased with the decreasing impurities concentration. During the process for the establishment of MSF model, the impurity concentration should be 100 times of its detection limit,the matrix concentration should be close to its concentration in the sample. Data collections for the MSF model and sample should be carried out in a same experiment under the same experimental conditions.%考察了La、Ce和Yb等基体元素对稀土杂质元素测定的光谱干扰.在杂质元素谱线窗口内,La、Ce和Yb所产生的干扰线总数量比文献报导的少,且当基体元素浓度增大时,在杂质元素谱线窗口内出现一些未曾报道过的谱线.经多元光谱拟合(MSF)法校正,基体元素的光谱干扰得到有效消除,杂质元素的检出限明显降低,但仍达不到没有La、Ce和Yb时的水平.当测定质量浓度为0.100μg/mL杂质元素时允许质量浓度为1 000~2 000μg/mL基体元素存在,当被测的杂质浓度进一步降低时允许基体元素的最高浓度也随之降低.建立MSF模型时,应使建模溶液中杂质元素浓度是这些元素检出限的100倍,基体元素浓度接近实际样品中基体的存在量,MSF建模数据与样品测定数据还须在同一实验条件下完成.
    • 石榴花; 郑建明
    • 摘要: 建立了等离子发射光谱法分析纯度99.99%的氧化铈中14种稀土杂质的新方法.详细考察了光谱干扰情况,选定了合适的分析谱线.同时,通过样品测量分析了基体效应,并得出了14种稀土杂质的方法检出限(0.013~0.317μg/mL).该方法简单、快速,准确,对实际样品的测定具有一定的参考价值.
    • 龚琦; 陈杰; 吉日文; 潘雪珍; 伍娟
    • 摘要: 以强酸型离子交换纤维柱分离寓集高纯Yb_2O_3中La,Nd,Eu和Gd等痕量杂质元素,并用Optima5300 DV ICP-AES测定分离寓集后的这4种元素.供试纤维对Yb的动态吸附容量为134 mg·g~(-1),4.0 g纤维柱的分离条件为:pH 3.00的试液以1.0 mL·min~(-1)流速上柱后,分离柱先以流速为1.5 mL·min~(-1)的pH 3.00 HNO_3溶液80 mL预淋洗,再以同样流速pH 5.00的0.01 mol·L~(-1) EDTA铵溶液淋洗.结果表明:10 mg Yb与各为0.100 μg的La,Nd,Eu和Gd能达到基线分离;分离含100 mg Yb的试液后,在杂质富集液中Yb的残留浓度仅为0.017 1 μg·mL~(-1).研究显示,当待测试液中Yb_2O_3的浓度小于100 μg·mL~(-1)(如Yb 87.8 μg·mL~(-1))时,它对测定La,Nd,Eu和Gd等杂质元素的基体干扰可以忽略不计.富集倍数分别为La_2O_3 3.68×10~5,Nd_2O_3 4.20×10~5,Eu_2O_3 3.82×10~5,Gd_2O_3 4.01×10~5.方法检出限分别为La_2O_3 0.005 0 pg·mL~(-1),Nd_2O_3 0.014 pg·mL~(-1),Eu_2O_3 0.001 8 pg·mL~(-1),Gd_2O_3 0.008 2 pg·mL~(-1).本方法已用于99.99%Yb_2O_3样品中4种稀土杂质的测定,标准加入的平均回收率分别为La_2O_3 94.2%,Nd_2O_3 107%,Eu_2O_3 97.8%,Gd_2O_3 102%,RSD(%,n=5)分别为La_2O_3 6.2,Nd_2O_3 5.9,Eu_2O_3 7.3,Gd_2O_3 2.5,校正曲线不需进行Yb的基体匹配,分析周期为4 h.
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