X-射线荧光光谱法(XRF)测定钼精矿中多种元素

详细论述了压片法及熔融片法测定钼精矿的分析条件。其中压片法通过大量采用同一矿区的生产样品经化学定值后作为校准样品建立校准曲线,因此粒度效应和矿物效应基本上可忽略。详细地讨论了元素之间谱线干扰、背景和脉冲高度选择。使用经验系数法校正基体效应,可准确测定钼精矿中的钼、硫、铁、铜、铅、锌等11种元素。在熔融片法中主要讨论了元素谱线的选择及其相互之间的干扰,经理论α系数校正后,可准确测定不同钼矿中的多种元素,其适用范围更广。

Determination of Multi-elements in Molybdenum Concentrates by XRF

This article discussed in detail the analysis conditions for analyzing molybdenum concentrates using pressed pellet and fused bead sample preparation methods. In the pressed pellet method, since a lot of production samples taken from the same mine are used to create calibration curves after these samples were chemically analyzed and given certified values, so the particle size effect and mineral effect can almost be ignored. The elemental interference problem, the selection of background and pulse height （PHD） were discussed in detail. The eleven elements in molybdenum concentrates including Mo, S, Cu, Pb, Zn, etc., can be accurately determined after matrix effect was corrected by empirical coefficient method. In the fused bead method, the line selection and line overlapping problem were mainly discussed. The multi-elements in different kind of molybdenum ores can be accurately determined after calibration with theoretical α coefficient and thus this method can be adopted widely.