A new set of standards for in-situ measurement of bromine abundances in natural silicate glasses: Application to SR-XRF, LA-ICP-MS and SIMS techniques
A new set of standards for in-situ measurement of bromine abundances in natural silicate glasses: Application to SR-XRF, LA-ICP-MS and SIMS techniques
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DOI：
10.1016/j.chemgeo.2017.01.012
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发表时间：
2017-03-05
期刊：
影响因子：
3.9
通讯作者：
Di Carlo, Ida
中科院分区：
文献类型：
--
作者：
Cadoux, Anita;Iacono-Marziano, Giada;Di Carlo, Ida
为了限制这种元素的地球动力学循环，测量地球物质中的低溴丰度仍然是一个重要的挑战。因此，需要合适的标准材料来建立可靠的分析方法来量化Br丰度。在这项研究中，我们表征了21种由天然火山岩（基性到硅成分）合成的掺Br玻璃，以便使用各种技术为Br分析提供一套新的标准。仪器中子活化分析（INAA）证实，21种玻璃中有15种玻璃的标称Br含量（实验样品中装载的Br量）在20%以内。使用这套新的标准，我们比较了三种微量分析方法来测量硅酸盐玻璃中的Br含量：同步x射线荧光（SR-XRF），激光烧蚀-电感耦合等离子体质谱（LA-ICP-MS）和二次离子体质谱（SIMS）。用SR-XRF测定标准玻璃中的Br含量，准确度最高（= 10 ppm； Br为25%）
Measuring the low bromine abundances in Earth's materials remains an important challenge in order to constrain the geodynamical cycle of this element. Suitable standard materials are therefore required to establish reliable analytical methods to quantify Br abundances. In this study we characterise 21 Br-doped glasses synthesized from natural volcanic rocks of mafic to silicic compositions, in order to produce a new set of standards for Br analyses using various techniques. The nominal Br contents (amounts of Br loaded in the experimental samples) of 15 of 21 glasses were confirmed within 20% by instrumental neutron activation analysis (INAA). Using this new set of standards, we compare three micro-analytical approaches to measure Br contents in silicate glasses: synchrotron X-ray fluorescence (SR-XRF), laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS), and secondary ion mass spectrometry (SIMS). With SR-XRF, the Br contents of the standard glasses were determined with the highest accuracy (= 10 ppm; >25% for Br