| 高温熔融研制钾长石玻璃标准物质初探 |
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| 引用本文： | 宋佳瑶,袁洪林,包志安,陈开运,贺国芬,范超.高温熔融研制钾长石玻璃标准物质初探[J].岩矿测试,2011,30(4):406-411. |
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| 作者姓名： | 宋佳瑶 袁洪林 包志安 陈开运 贺国芬 范超 |
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| 作者单位： | 西北大学地质学系,大陆动力学国家重点实验室,陕西西安710069 |
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| 基金项目： | 国家自然科学基金项目，教育部科学研究重大项目，新世纪优秀人才支持计划项目，霍英东教育基金会项目，西北大学大陆动力学国家重点实验室科技部专项 |
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| 摘 要： | 激光剥蚀多接收等离子体质谱(LA-MC-ICPMS)是进行原位微区分析微量元素和同位素的重要技术之一,标准样品与样品之间的基体匹配是解决影响该技术准确分析的基体效应和分馏效应的首选方案。长石(特别是长石微区)的Pb同位素组成是示踪岩石形成和演化历史的重要途径,而LA-MC-ICPMS技术则是进行长石Pb同位素原位微区分析的关键技术,然而目前国内外尚没有合适的长石Pb同位素分析标准。文章研究探讨了利用高温炉进行原位微区分析钾长石中Pb同位素组成所用外部标准物质合成条件,结果表明,常规的74μm(200目)碎样无法得到均一的钾长石玻璃,需要将初始钾长石粉末研磨至1300目以下;高温炉合成温度为1680℃;熔融时间为2 h;采用液氮方式淬火。制成的钾长石玻璃除表面具有轻微的不均一性外,内部的Pb同位素比值为1.90779±0.00009(208Pb/206Pb,2s),0.75899±0.00004(207Pb/206Pb,2s),20.909±0.002(206Pb/204Pb,2s),15.871±0.002(207 Pb/204 Pb,2s)和39.888±0.005(208 Pb/204 Pb,2s),相应的相对标准偏差(RSD)分别为0.007%、0.008%、0.016%、0.016%和0.021%。表明利用本研究方法合成的钾长石玻璃可作为潜在的钾长石中Pb同位素组成原位微区分析外部校准物质。
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| 关 键 词： | 标准物质研制 钾长石玻璃 激光剥蚀等离子体质谱法 高温熔融 铅同位素 |
| 收稿时间： | 2010/3/14 0:00:00 |
| 修稿时间： | 4/1/2011 12:00:00 AM |
Preliminary Research of K-feldspar Glasses Synthesis by High Temperature Melting |
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| SONG Jia-yao,YUAN Hong-lin,BAO Zhi-an,CHEN Kai-yun,HE Guo-fen and FAN Chao.Preliminary Research of K-feldspar Glasses Synthesis by High Temperature Melting[J].Rock and Mineral Analysis,2011,30(4):406-411. |
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| Authors: | SONG Jia-yao YUAN Hong-lin BAO Zhi-an CHEN Kai-yun HE Guo-fen and FAN Chao |
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| Institution: | State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China;State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China |
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| Abstract: | Laser ablation Quadruple and multiple collector ICP-MS(LA-Q & MC-ICPMS) is one of the most important analytical technique in terms of in situ analysis of trace elements and isotopic compositions.A matrix-matched standard is the principal way to obtain precise measurements by reducing mass fractionation and matrix interferences.Lead isotopic composition of K-feldspar is one of the important proxies to trace the history of rock formation and evolution.However,there is no appropriate external standard for in s... |
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| Keywords: | standard material synthesis K-feldspar glasses laser ablation-inductively coupled plasma-mass spectrometry high temperature melting lead isotope |
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