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首页> 外文期刊>Science Journal of Chemistry >Determination of Iron Oxide Content in Bauxites Using X-Ray Fluorescence Spectrometry by Pressing: A Comparative Study with Spectrophotometric Method
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Determination of Iron Oxide Content in Bauxites Using X-Ray Fluorescence Spectrometry by Pressing: A Comparative Study with Spectrophotometric Method

机译：X射线荧光光谱法测定铝土矿中氧化铁的含量：分光光度法的比较研究

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Bauxite is the primary ore for aluminum extraction. In order to assess the quality of bauxite, it is important to determine not only the content of Al_(2)O_(3) but the content of Fe_(2)O_(3) as well. Determining the composition of bauxite is very important from the aspect of determining the quality of bauxite. Therefore, it is important to use a method that is fast, accurate, and precise. In this paper the results of the comparison of two methods are presented. Bauxites of different deposits were analysed for their content of Fe_(2)O_(3) (mass %), using the X-ray fluorescence spectrometry and reference spectrophotometric method MA. B. M.018. The samples were annealed prior to the process, and beads were prepared by pressing for the purpose of the analysis. Certified reference samples of bauxite were used for producing a calibration curve. The equation for calculating the content of Fe_(2)O_(3) (mass %) in the samples of bauxite was derived from the calibration curve, which was obtained with the coefficient of correlation r = 0.9989 and the standard deviation S = 3.4420. The XRF method was statistically verified by the F-test and t-test (using the standard sample of the bauxite and the reference method). The values obtained from the mentioned tests showed that the XRF method was imprecise and inaccurate for determination of iron oxide in bauxite, when the samples was prepared by pressing.
机译：铝土矿是铝提取的主要矿石。为了评估铝土矿的质量，不仅要确定Al_（2）O_（3）的含量，还要确定Fe_（2）O_（3）的含量也很重要。从确定铝土矿的质量方面来看，确定铝土矿的组成非常重要。因此，使用快速，准确和精确的方法很重要。本文介绍了两种方法的比较结果。使用X射线荧光光谱法和参考分光光度法MA分析了不同沉积物的铝土矿中Fe_（2）O_（3）（质量％）的含量。 B.M.018。在处理之前，先对样品进行退火，然后通过压制制备珠子以进行分析。经认证的铝土矿参考样品用于生成校准曲线。从校准曲线导出计算铝土矿样品中Fe_（2）O_（3）的含量（质量％）的方程式，该方程式的相关系数为r = 0.9989，标准偏差S = 3.4420。通过F检验和t检验（使用铝土矿标准样品和参考方法）对XRF方法进行了统计学验证。从上述测试中获得的值表明，当通过压制制备样品时，XRF方法对铝土矿中氧化铁的测定是不准确且不准确的。

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