An accurate XRF method for the analysis of geochemical exploration samples for major and trace elements using one glass disc
An accurate XRF method for the analysis of geochemical exploration samples for major and trace elements using one glass disc
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DOI：
10.1016/0009-2541(80)90002-9
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发表时间：
1980
期刊：
影响因子：
3.9
通讯作者：
J. Hutton;S. Elliott
中科院分区：
文献类型：
--
作者：
J. Hutton;S. Elliott
使用2.2：1的通量与样品比熔化岩石样品，使得主量和微量元素都能够在一个玻璃圆盘上精确地测定。硼酸锂比偏硼酸锂碱性更强，能够在这种稀释度下溶解大多数硅酸盐岩石。尽管计数率降低，但氧化镧的加入是有必要的，因为质量吸收系数的变化减少了五倍。熔融除了产生比压制粉末更稳定的样品外，还消除了颗粒尺寸效应，减少了基体校正，并使每个样品的背景测定变得不必要。纯化学品已被用于校准，并分析了五个著名的标准岩石，以证明这种单一的玻璃圆盘技术的15个主要和微量元素的精度和准确性。
Fusion of rock samples using a flux to sample ratio of 2.2:1 has enabled both major and trace elements to be determined precisely and accurately on the one glass disc. Lithium borate, more alkaline than lithium metaborate, is capable of dissolving most silicate rocks at this dilution. The addition of lanthanum oxide is warranted despite the reduction in counting rate because variations in mass absorption coefficients are reduced up to five-fold. Fusion, in addition to producing samples more stable than pressed powders, eliminates particle-size effects, reduces matrix corrections and makes the determination of back-ground on each sample unnecessary. Pure chemicals have been used for calibration, and five well-known standard rocks analysed to demonstrate the precision and accuracy of this single glass disc technique for fifteen major and trace elements.