共查询到20条相似文献,搜索用时 46 毫秒
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ICP-AES法测定金属硅中的Al、B、Ba、Ca、Cr、Cu、 Fe、Mg、Mn、Ni、Sr、Ti、V和Zn杂质元素 总被引:13,自引:0,他引:13
本文提供了一种测定金属硅中B,Fe,Al,Ca,Mn等14个杂质元素的ICP-AES方法,在样品处理过程中,加入适量体积的甘露醇能够抑制B的挥发。用本方法测定了一个国家地球化学标准样(GSR-4),结果令人满意。 相似文献
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发射光谱法测定高纯银中微量金、铂、钯、铑、铱、锑、铅、铋、铁、铜、镍、铬、铝和锌 总被引:1,自引:0,他引:1
本文研究了贵金属标准溶液除氯离子的有关问题,解决了高纯硝酸银中贵金属等杂质元素的标样配制,以硝酸银直接压样于普通电极中直流电弧激发,可测定99.0~99.99%的高纯银,该方法简便、快速、准确。 相似文献
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纯硒中杂质元素的ICP-AES测定 总被引:1,自引:0,他引:1
电感耦合等离子体-原子发射光谱同时测定纯硒中的碲、铅、铋、锑、铜、铁、镍、铝、锡、砷和硼12种元素的含量,优化出各元素的分析波长和分析条件;用基体匹配补偿基体效应,方法简单,快速可靠,样品回收率为94%-107%. 相似文献
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The lowest absorption band of the tetraphenyl compounds resembles that of the lowest absorption band of benzene with the following difference. In benzene the electronic origin is strictly forbidden, and all intensity is associated with a symmetric progression built on one mode of asymmetric vibration. In the tetraphenyl compounds the intensity associated with the asymmetric vibration is relatively unaffected; however, there is increasing intensity associated with the electronic origin and a symmetric progression built on it along the series . For the cations it is the electronic origin and the progression built on it that are the primary source of intensity. This effect is attributed to an inductive perturbation. A similar effect is observed in the fluorescence spectrum. In phosphorescence, the relative enhancement of the electronic origin and the progression built on it is far less marked. The phosphorescence emission of φ4Pb and φ4Sb+ are red shifted from the others by ~0.5 eV, an effect attributed to formation of a triplet excimer. Increasing spin-orbit coupling in the triplet due to a heavy atom effect can be seen in the decreasing phosphorescence lifetime (range 4 sec to 4 msec) and decreasing ratio of (fluorescence to phosphorescence quantum yields) in the order In all cases nonexponential decay of phosphorescence is observed. 相似文献
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Russian Physics Journal - On the basis of the charge neutrality concept, the analysis is fulfilled of the experimental data on the electron properties of the defective semiconductors after the... 相似文献
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Hugo O. Mosca 《Surface science》2007,601(15):3224-3232
The surface energy for different surface orientations of the solid solutions as a function of concentration formed by Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W is computed and analyzed using the BFS method for alloys. Similarities and differences among the different binary alloys are examined in terms of strain and chemical effects. 相似文献
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本文介绍了电感耦合等离子体发射光谱法(ICP-AES)测定高纯铼酸铵中12个杂质元素的方法。采用挥发健康基体,探讨了高铼酸铵基体的干扰及其消除办法。ICP-AES测定结果的准确度和精密度均能满足分析要求。 相似文献
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ICP—AES法直接测定锡锭中的As,A1,Bi,Cd,Cu,Fe,Pb,Se,Sb,Zn 总被引:4,自引:0,他引:4
以电荷耦合器件为检测器的全谱直读等离子体光谱仪直接测定锡锭中As、A1、Bi、Cd、Cu、Fed、Pb、Se、Sb、Zn十种杂质元素的含量。该方法简便、快速且具有比化学法更低的检出限,加标回收试验结果不明,回收率为92%-105%,RSD均小于1.5%。 相似文献
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ICP—AES法测定铁矿中铝,钙,镁,锰,钴,铜,钠和钾 总被引:3,自引:0,他引:3
本文研究了ICP-AES法测定铁矿中铝,钙、镁、锰、钴、铜、钠和钾的方法。对仪器工作参数,共存元素的光谱干扰和基体效应干扰进行了探讨。采用向标准系列中加入铁基空白溶液建立工作曲线,试样经酸处理后即可直接测定。本方法获得了良好的回收率(95~103%)和变异系数(0.5~1.3%,n=11),同原子吸收法进行比对试验,结果一致。 相似文献
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Electrical explosion of wires (EEW) is a promising method for nanopowders preparation and insensitive explosives ignition. Plasma radiation plays a key role in the ignition process while little attention has been paid on this phenomenon before. This letter introduces optical emission behaviors of electrical explosions for nine materials in air, Helium, and Argon with the SWE-2 platform. Experimental results indicated that the light intensity for non-refractory metals decayed rapidly after the discharge ended. In contrast, for refractory metals, the emission continued to increase and lasted for a long period after the discharge ceased. As for spectra, the emission consisted of line and continuous spectra. With the atomic number increased, the density of lines grew rapidly, leading to a “continuous” appearance. 相似文献
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ICP-AES法同时测定螺旋藻中Ca、Mg、P、Fe、Cu、Mn、Zn 总被引:9,自引:2,他引:7
本文研究了干法灰化,盐酸溶解盐类,ICP-AES技术同时测定螺旋藻中Ca、mg、P、Fe、Cu、Mn、Zn的方法,进行了共存离子干扰和谱线干扰试验,对Cu、Mn、Zn进行了AAS法测定对比。方法的相对标准偏差为1.39%-5.02%,标准回收率为95.6%-104.8%。方法快速、准确、可靠。 相似文献
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《中国物理C(英文版)》2014,(9)
<正>Magnetic Monopole Searches MAGNETIC MONOPOLES Updated August 2013 by D.Milstead(Stockholm Univ.)and E.J.Weinberg(Columbia Univ.).The symmetry between electric and magnetic fields in the sourcefree Maxwell's equations naturally suggests that electric charges might have magnetic counterparts,known as magnetic monopoles.Although the greatest interest has been in the supermassive monopoles that are a firm prediction of all grand unified theories,one cannot exclude the possibility of lighter monopoles,even though there is at present no strong theoretical motivation for these. 相似文献