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
Main Authors 吴磊, 刘义博, 王家松, 吴良英, 张楠, 王娜
Format Journal Article
LanguageChinese
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
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ISSN0254-5357
DOI10.15898/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.
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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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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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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Snippet 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...
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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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