Determination of Fe and Zn contents and distributions in natural sphalerite/marmatite by various analysis methods

天然闪锌矿/铁闪锌矿中铁和锌含量及分布的多方法确定

The contents of Fe and Zn in natural sphalerite samples were determined by chemical titration and spectroscopic techniques(portable X-ray fluorescence(P-XRF) spectrometry, electron probe microanalysis with energy dispersive spectroscopy(EPMA-EDS), electron probe microanalysis with wavelength dispersive spectroscopy(EPMA-WDS), and time-of-flight secondary ion mass spectrometry(To F-SIMS)). Besides, the distribution of Fe and Zn in sphalerite samples was analyzed by imaging EPMA-WDS and imaging To F-SIMS. The results show that Fe and Zn contents determined by each spectroscopic technique have good linearity with those determined by chemical titration(R^2>0.77), and the R^2 values of Fe are generally greater than those of Zn. The imaging analysis results revealed that Fe and Zn are not uniformly distributed in the sphalerite.

采用化学滴定和光谱技术(便携式X射线荧光光谱(P-XRF)、电子探针能量色散光谱(EPMA-EDS)、电子探针波长色散光谱(EPMA-WDS)和飞行时间二次离子质谱(To F-SIMS))测定天然闪锌矿样品中Fe和Zn的含量。此外,利用EPMA-WDS成像和To F-SIMS成像分析闪锌矿样品中Fe和Zn的分布。结果表明,各光谱法测定的Fe和Zn含量与化学滴定法测定的Fe和Zn含量具有良好的线性关系(R^2>0.77),并且总体上Fe的R^2值大于Zn的R^2值。成像分析结果表明,Fe和Zn在闪锌矿中分布不均匀。