Abstract

The emergence of the integrated wavelength-dispersive and energy-dispersive Zetium X-ray fluorescence spectrometer technique offered new chances to analyze elemental distribution with minimal sample preparation in complex matrix geological samples-northern Hainan island soils. Wavelength-dispersive X-ray fluorescence was applied for the measurement of bromine in the northern Hainan island soil. To reduce the fluctuations of the low-bromine-content measurement results, a two-channel measurement of bromine was designed, and the average value of the two-channel measurements was used as the final result. The soil samples in northern Hainan Island were rich in iodine, with a content range of a few µg/g to more than 100 µg/g, and these were particularly suitable to be analyzed by energy-dispersive X-ray fluorescence spectrometer. The geological samples in northern Hainan Island were brown, purple, and brown-red soil containing kaolinite, ilmenite, rutile, anatase, and goethite. These soil samples were rich in titanium, aluminum, and iron. The titanium concentration in the northern Hainan Island soil was anomalously high (up to 15.05%), far exceeding the content range of the calibration curve. Owing to the empirical coefficient matrix correction method, unreliable or even unreasonable results were obtained for some elements. By systematically mitigating matrix effects through the development of custom reference materials and building matrix-matched measurement and calibration routines, the quantification of Vanadium, Barium, and major components in northern Hainan Island soil samples was optimized. The efficacy of the X-ray fluorescence spectrometer method was confirmed by comparison with inductively coupled plasma–optical emission spectroscopy analysis. This work demonstrates the capability of the integrated wavelength-dispersive and energy-dispersive Zetium X-ray fluorescence spectrometer technique for reliable quantitative elemental analysis of complex matrix geological samples.

摘要

集成波长色散和能量色散 Zetium X 射线荧光光谱仪技术的出现为分析复杂基质地质样品——海南岛北部土壤中的元素分布提供了新的机会，只需最少的样品制备。应用波长色散 X 射线荧光法测定海南岛北部土壤中的溴。为减小低溴含量测量结果的波动，设计了溴的双通道测量，取双通道测量结果的平均值作为最终结果。海南岛北部的土壤样品中含有丰富的碘，含量范围为几微克/克到100微克/克以上，特别适合用能量色散X射线荧光光谱仪进行分析。海南岛北部的地质样品为棕色、紫色和棕红色土壤，含有高岭石、钛铁矿、金红石、锐钛矿和针铁矿。这些土壤样本富含钛、铝和铁。海南岛北部土壤钛浓度异常高（高达15.05%），远超校准曲线的含量范围。由于采用经验系数矩阵校正方法，某些元素得到的结果不可靠甚至不合理。通过开发定制参考材料和构建基质匹配测量和校准程序，系统地减轻基质效应，优化了海南岛北部土壤样品中钒、钡和主要成分的定量分析。通过与电感耦合等离子体-光发射光谱分析的比较，证实了 X 射线荧光光谱仪方法的有效性。这项工作展示了集成波长色散和能量色散 Zetium X 射线荧光光谱仪技术对复杂基质地质样品进行可靠定量元素分析的能力。