| Direct Determination of Trace Impurities in High Purity Neodymium after In-Situ Analyte-Matrix Separation by Fluorination Assisted ETV-ICP-AES |
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| 引用本文： | Ruth Wanjau,胡斌,何蔓,江祖成,吴英亮. Direct Determination of Trace Impurities in High Purity Neodymium after In-Situ Analyte-Matrix Separation by Fluorination Assisted ETV-ICP-AES[J]. 中国稀土学报(英文版), 2004, 22(3): 319-322 |
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| 作者姓名： | Ruth Wanjau 胡斌 何蔓 江祖成 吴英亮 |
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| 作者单位： | Kenyatta University，Kenya，Department of Chemistry，Wuhan University，Wuhan 430072，China，Department of Chemistry，Wuhan University，Wuhan 430072，China，Department of Chemistry，Wuhan University，Wuhan 430072，China，Department of Chemistry，Wuhan University，Wuhan 430072，China |
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| 摘 要： | Highpurityrareearthproductshavebeenappliedinmanyhigh techfieldsinrecentyears .NeodymiumoxideisoneofthewidelyusedREEs ,anditisneces sarythereforetodevelopmethodsforthedeterminationofnon -REEimpuritiesinhighpurityNd2 O3[1] .Itiswellestablishedthatsampleintroductionisacriticalstepinananalyticalprocedure .Comparedwithsolutionnebulization ,directsolidintroductionschemesareveryattractiveforitsincreasingthetrans portefficiency ,abilityofsampleanalysisinsmallamounts ,andnotsufferingfromcontaminatio…
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| 关 键 词： | 氟化作用 ETV-ICP-AES 分离 化学分析 稀土 PTFE 塑料 |
Direct Determination of Trace Impurities in High Purity Neodymium after In-Situ Analyte-Matrix Separation by Fluorination Assisted ETV-ICP-AES |
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| Ruth Wanjau. Direct Determination of Trace Impurities in High Purity Neodymium after In-Situ Analyte-Matrix Separation by Fluorination Assisted ETV-ICP-AES[J]. Journal of Rare Earths, 2004, 22(3): 319-322 |
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| Authors: | Ruth Wanjau |
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| Abstract: | Using PTFE as a chemical modifier, a method for the determination of trace impurities in high purity Nd2O3 by in-situ separation and electrothermal vaporization-inductively coupled plasma-atomic emission spectrometry (ETV-ICP-AES) was developed. The analyte-matrix separation and the temperature program of graphite furnace were investigated and optimized. The solid samples were directly introduced into graphite furnace in the form of slurry, where selective volatilization between the matrix and the analytes took place. The Nd matrix was retained in the graphite furnace during the evaporation step, while the trace analyte impurities were vaporized and removed. As a result, the matrix interference that is serious without the modifier is suppressed effectively. The achievable detection limits are (μg·g-1): Ti 0.15, Mn 0.15, Ni 0.20, Co 0.54, respectively. The proposed method was applied to direct determination of trace impurities in high purity Nd2O3 with satisfactory results. |
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| Keywords: | chemical analysis fluorination ETV-ICP-AES in-situ separation rare earths |
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