共查询到19条相似文献,搜索用时 78 毫秒
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X射线荧光光光谱分析 总被引:3,自引:0,他引:3
评述了我国在2007~2008年X射线荧光光谱,包括质子激发的X射线光谱的发展和应用,内容包括仪器、软件、仪器改造、仪器维护和维修、基础研究和分析方法研究及其应用. 相似文献
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铁矿的X射线荧光光谱分析 总被引:6,自引:0,他引:6
采用无水四硼酸锂为溶剂,硝酸锂为氧化剂,经高温熔融制成的玻璃熔片,进行进口铁矿的主次元素含量测定。试验结果表明,分析结果经基体校正后与标样值比较,其准确度令人满意,与化学法相比,方法简便快速,精密度高,准确度好。 相似文献
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铌酸钾锂的X射线荧光光谱分析 总被引:2,自引:0,他引:2
提出了一种用X射线荧光光谱分析铌酸钾锂中Li_2O,K_2O和Nb_2O_5的方法.采用deJongh校正方程,将Li_2O当作消去组分,所得Li_2O的结果与ICP-AES法一致.同时建立了非破坏分析校正曲线. 相似文献
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《Analytical letters》2012,45(17):1373-1382
Abstract Standard solutions of dimethylarsinic acid in water and methanol are deposited on Whatman No. 1 and No. 114 filter papers. The arsenic content is measured by X-ray fluorescence spectrometry. The observed specific count depends on the nature of solvents, the volume of spotting solutions, the method of spotting and the type of filter papers. 相似文献
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《Analytical letters》2012,45(5):836-842
A method for the quantitative analysis of lead ores by wavelength-dispersive x-ray fluorescence spectrometry (WD-XRF) using sepharose was proposed. The sample was decomposed with aqua regia and then the solution was mixed with sepharose. The mixture was heated to boiling and became a quasi-solid gel at ambient temperature. The quasi-solid gel was detected by WD-XRF. This method was adapted in detecting high content ores, because it avoided the risk of using platinum crucible. In addition, cobalt was used as an internal standard to reduce the matrix effects caused by the loss of water in dissolving samples. Analytical characteristics of the methods used were compared, and their reliability tested against several certified geological reference materials. The results showed high precision and accuracy. This method has been applied to the determination of lead in lead concentrates successfully. 相似文献
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本文提出以透明胶纸作为少量粉末样品的支持物来制备样片,采用透空照射法,在日本理学3080E3型X-射线荧光光谱仪上实现了蒙脱石中化学元素的定量测定。本法样品实际用量约10mg,制样与测量精度较好,标样及样品的分析结果与推荐值及AAS法分析结果基本一致,方法具有简单、快速、准确和成本低的特点,适用于少量样品和单矿物的分析。 相似文献
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熔融法X射线荧光光谱测定岩石主成分含量 总被引:2,自引:0,他引:2
选用国家一级标准物质,采用X射线荧光光谱法对岩石样品中的二氧化硅、氧化铝、氧化钙、氧化镁、氧化钾、氧化钠、三氧化二铁、五氧化二磷、氧化钛、氧化锰10种主要组分进行测定,分析结果和标准值或化学值相吻合,各组分测定结果的相对标准偏差小于2%(n=12)。 相似文献
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《Analytical letters》2012,45(9):1598-1605
Sulfide ores with varied concentrations, including four ore reference materials (zinc, copper, and iron sulfides) and two copper-nickel and iron sulfide samples, were used to develop an improved method for their analysis by X-ray fluorescence. The optimum conditions were established for the fusion of homogeneous stable glass disks. Different weights of silica were added to the samples, which were then fused with a lithium borate flux. The amount of silica varied from 1:20 for samples with low sulfur concentrations to 1:5 for those with high concentrations. The weight ratio of sample (including silica) to lithium tetraborate was 1:14. Lithium nitrate was used as a pre-oxidizing reagent to prevent degradation of platinum–gold crucibles. After pre-oxidation at 580°C for 13 minutes, the temperature was increased to 1100°C for 12 minutes. The relative standard deviations for major and trace elements were generally better than 5% and 10%, respectively. 相似文献
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