A TOTAL CONTENT X—RAY FLUORESCENCE METHOD FOR COPPER PROSPECTING

A new method is proposed to prospect copper deposits with portable XRF analyzer. The method is based on the close relation between Cu and the chalcophile elements or some other elements in the geochemical anomalies of a Cu deposit. Applications of the technique in Northeast China are presented.

Quantification of Silicon (SI) and Silicon Dioxide (SiO2) from the Nafud Desert-Al-Qassim Region, Kingdom of Saudi Arabia Using XRD Analysis

This research was conducted in the Qassim region, Kingdom of Saudi Arabia. The goal of this research is to determine the percentage of silicon in the Rub al-Khali desert. Samples were collected from four cities located in the Al-Qassim Region of Saudi Arabia (Uyun Al-Jawa, Al-Fuwailiq, Al-Sulaibiya, and Al-Qawara), from three distinct depths (the earth’s surface, 50 cm, and 100 cm). The percentages of silicon in these places vary between the highest value for silicon dioxide, which is 74.47 m/m%, and 34.8 m/m% for silicon in Al-Qawara city at a depth of 100 cm. We used an x-ray fluorescence (XRF) instrument to evaluate the samples. There are high percentage of both silica and silicon in the Nafud desert. Studies have shown that these ratios can help investors benefit from an element of Silicon and silicon dioxide, so the sands of the Nafud desert is sufficient for extracting Silicon and silica in huge quantities. This may transform the Kingdom into a leading country in the global computer technology industry that depends on silicon extracted from the desert sands, the most important of which are microcomputer data processing devices.

用手持式X荧光仪分析不锈钢主元素的含量

本文用IED-2000T型手持式X荧光分析仪对304#不锈钢中主元素Cr、Fe、Ni进行快速分析,该仪器用微功耗铑靶X光管激发样品,电制冷Si-Pin半导体作探测器(仪器分辨率FWHM<180ev@5.9ke V)。用特征峰计数率和标样推荐值进行线性拟合来校正基体效应,Cr、Ni元素以一元线性拟,Fe元素以三元线性拟合,达到预期效果。实验表明,Cr、Fe、Ni的平均相对误差分别是0.88%、0.69%、1.15%。因此,IED-2000T型手持式X射线荧光分析仪进行不锈钢成分现场快速分析是可行的。

Rapid Growth of Pentaerythritol Crystal

Pentaerythritol（PET） crystal has been grown rapidly from the solution with sulfuric acid as the additive. The growth rate of PET crystal in prismatic shape exceeds 1.5 mm/day and crystallization size is 55×55×50 mm^3. X-ray diffraction analysis was used to confirm the structure integrity. The diffraction efficiency of rapid-grown crystal was characterized as effective as that of normal growth.

手持式X荧光分析仪分析不锈钢中Cr、Ni、Mn的不确定度评定

用手持式X荧光分析仪对不锈钢中Cr、Ni、Mn元素进行测定,分析了不锈钢中Cr、Ni、Mn元素的不确定度来源,并对不确定度因素进行评定,计算出了用手持式X荧光分析仪测定不锈钢中Cr、Ni、Mn元素的各不确定度分量、合成标准不确定度和扩展不确定度。本文的分析数据为手持式X荧光分析仪的检测分析提供了可靠的数据支撑,为我公司采用X荧光分析仪分析合金材质提供了依据。

史前陶器的手持式X射线荧光光谱仪分析

利用电感耦合等离子体发射光谱、X射线荧光光谱熔融法和手持式X射线荧光光谱仪,分析27个史前陶片的化学组成。在层次聚类分析的基础上,比较三种方法所得到的系统树图以及各自揭示的陶片分布模式。研究指出,在社群(尤其是超地方性社群)尺度上,三种分析手段对于认识陶器的生产和分配网络具有相似程度的分辨力;在家户尺度上,它们同样一致地表现出应用的可行性和前景。研究肯定了手持式X射线荧光仪在史前陶器分析中的有效性。