高压密闭消解-电感耦合等离子体质谱法测定锰矿石中的稀土元素前处理方法研究
O657.63; 高压密闭消解因称样量小、用酸量少、空白低等优点成为测定稀土元素前处理的主要方法.但锰矿石组分复杂,锰含量差别较大且具有多种不同价态,常含有伴(共)生金属和其他杂质,该方法采用常规酸溶体系很难将其消解完全,造成ICP-MS测试结果不准确.本文从样品前处理消解效果出发,选择锰矿石标准物质GBW07261、GBW07263、GBW07266和一个锰矿石样品,试验了三种酸溶前处理方法对锰矿石稀土元素测试的影响.结果表明:方法一(氢氟酸-硝酸密闭消解,硝酸复溶提取)不能将锰矿石样品完全消解,测定值偏低0.28% ~61.31%;方法二(氢氟酸-硝酸-双氧水密闭消解,硝酸-双氧水复溶,硝...
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| Published in | 岩矿测试 Vol. 37; no. 6; pp. 637 - 643 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国地质调查局天津地质调查中心,天津 300170
2018
中国地质调查局泥质海岸带地质环境重点实验室,天津 300170%中国地质调查局天津地质调查中心,天津,300170 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0254-5357 |
| DOI | 10.15898/j.cnki.11-2131/td.201712060189 |
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| Abstract | O657.63; 高压密闭消解因称样量小、用酸量少、空白低等优点成为测定稀土元素前处理的主要方法.但锰矿石组分复杂,锰含量差别较大且具有多种不同价态,常含有伴(共)生金属和其他杂质,该方法采用常规酸溶体系很难将其消解完全,造成ICP-MS测试结果不准确.本文从样品前处理消解效果出发,选择锰矿石标准物质GBW07261、GBW07263、GBW07266和一个锰矿石样品,试验了三种酸溶前处理方法对锰矿石稀土元素测试的影响.结果表明:方法一(氢氟酸-硝酸密闭消解,硝酸复溶提取)不能将锰矿石样品完全消解,测定值偏低0.28% ~61.31%;方法二(氢氟酸-硝酸-双氧水密闭消解,硝酸-双氧水复溶,硝酸提取)和方法三(氢氟酸-硝酸密闭消解,盐酸复溶,硝酸提取)均可将锰矿石样品消解完全,用ICP-MS测定稀土元素的数据较为接近,与传统的过氧化钠熔融ICP-MS法测定值吻合.但实验过程中发现对于锰含量较高的样品,方法三需多次重复加入盐酸复溶后方可将样品消解完全,而方法二复溶一次即可.因此,方法二对锰矿石样品的消解效率更高,精密度好(0.96% ~2.68%),加标回收率在95.0% ~107.0%之间,更适用于锰矿石中稀土元素的分析. |
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| AbstractList | O657.63; 高压密闭消解因称样量小、用酸量少、空白低等优点成为测定稀土元素前处理的主要方法.但锰矿石组分复杂,锰含量差别较大且具有多种不同价态,常含有伴(共)生金属和其他杂质,该方法采用常规酸溶体系很难将其消解完全,造成ICP-MS测试结果不准确.本文从样品前处理消解效果出发,选择锰矿石标准物质GBW07261、GBW07263、GBW07266和一个锰矿石样品,试验了三种酸溶前处理方法对锰矿石稀土元素测试的影响.结果表明:方法一(氢氟酸-硝酸密闭消解,硝酸复溶提取)不能将锰矿石样品完全消解,测定值偏低0.28% ~61.31%;方法二(氢氟酸-硝酸-双氧水密闭消解,硝酸-双氧水复溶,硝酸提取)和方法三(氢氟酸-硝酸密闭消解,盐酸复溶,硝酸提取)均可将锰矿石样品消解完全,用ICP-MS测定稀土元素的数据较为接近,与传统的过氧化钠熔融ICP-MS法测定值吻合.但实验过程中发现对于锰含量较高的样品,方法三需多次重复加入盐酸复溶后方可将样品消解完全,而方法二复溶一次即可.因此,方法二对锰矿石样品的消解效率更高,精密度好(0.96% ~2.68%),加标回收率在95.0% ~107.0%之间,更适用于锰矿石中稀土元素的分析. |
| Author | 刘义博 吴良英 张楠 吴磊 王家松 王娜 |
| AuthorAffiliation | 中国地质调查局天津地质调查中心,天津 300170;中国地质调查局泥质海岸带地质环境重点实验室,天津 300170%中国地质调查局天津地质调查中心,天津,300170 |
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| Author_FL | WANG Jia-song WANG Na WU Liang-ying LIU Yi-bo WU Lei ZHANG Nan |
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| DocumentTitle_FL | Sample Treatment Methods for Determination of Rare Earth Elements in Manganese Ore by High-pressure Closed Digestion-Inductively Coupled Plasma-Mass Spectrometry |
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| Keywords | 高压密闭消解 双氧水 电感耦合等离子体质谱法 稀土元素 锰矿石 |
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| Title | 高压密闭消解-电感耦合等离子体质谱法测定锰矿石中的稀土元素前处理方法研究 |
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