Table A. Near real-time management of spectral interferences with portable XRF spectrometers: Application to Sc quantification in nickeliferous laterite ores

Table A: Spectral characteristics (ROI ranges, Kα, Kβ spectral lines and escape peaks) for Ca, Sc, Ti, Mn and Fe analysis using pXRF, expressed in keV. The ROI ranges are obtained by the NDT Alpha software relative to pXRF (NitonTM XL3t GOLDD+ of ThermoFisher ScientificTM) with the ‘Soil’ mode using the ‘Low’ filter (20 kV and Cu target). EDS resolution is 130 eV based on the Kα spectral line of Mn. For this study, the critical spectral interference is coloured blue-grey (Ca interfering with Sc), while other spectral interferences are coloured light grey (Sc with Ti and Fe with Mn).

表A：采用便携式X射线荧光光谱（portable X-ray fluorescence, pXRF）分析钙（Ca）、钪（Sc）、钛（Ti）、锰（Mn）及铁（Fe）的光谱特性参数（感兴趣区域[Region of Interest, ROI]范围、Kα、Kβ谱线及逃逸峰），单位为千电子伏特（keV）。该ROI范围由NDT Alpha软件针对赛默飞世尔科技TM的NitonTM XL3t GOLDD+型pXRF设备测得，测试采用"土壤"模式搭配"低能"滤片（20 kV，铜靶）。能量色散X射线光谱（Energy Dispersive Spectroscopy, EDS）的分辨率为130电子伏特（eV），其校准基准为锰的Kα谱线。本研究中，关键光谱干扰以蓝灰色标注（钙对钪的干扰），其余光谱干扰以浅灰色标注（钪对钛、铁对锰的干扰）。