共查询到20条相似文献，搜索用时 156 毫秒
1.
《Scientia Geologica Sinica》1997,(2)
ＴＩＤＡＬＦＬＡＴＳＴＯＲＭＤＥＰＯＳＩＴＳＯＦＭＩＤＤＬＥＣＡＭＢＲＩＮＩＮＳＨＩＭＥＮＤＩＳＴＲＩＣＴ，ＨＵＮＡＮＰＲＯＶＩＮＣＥTXＴＩＤＡＬＦＬＡＴＳＴＯＲＭＤＥＰＯＳＩＴＳＯＦＭＩＤＤＬＥＣＡＭＢＲＩＡＮＩＮＳＨＩＭＥＮＤＩＳＴＲＩＣＴ，ＨＵ... 相似文献
2.
《Scientia Geologica Sinica》1997,(1)
ＴＲＩＡＳＳＩＣＶＯＬＣＡＮＩＳＭＩＮＮＯＲＴＨＷＥＳＴＹＵＮ－ＮＡＮ：ＧＥＯＬＯＧＩＣＡＬＲＥＣＯＲＤＯＦＤＥＬＡＭＩ－ＮＡ－ＴＩＯＮ－ＲＥＬＡＴＥＤＲＩＦＴＩＮＧＩＮＣＯＬＬＩＳＩＯＮＡＬＯＲＯＧＥＮＹTXＴＲＩＡＳＳＩＣＶＯＬＣＡＮＩＳＭＩＮＮＯ... 相似文献
3.
１：５万区调中Ｒｎ－Ｈｇ联测及~（２１０）Ｐｏ等综合指标测量方法技术和应用研究ＴＥＣＨＮＩＱＵＥＳＡＮＤＡＰＰＬＩＣＡＴＩＯＮＯＦＣＯＭＢＩＮＥＤＲｎ－ＨｇＭＥＡＳＵＲＥＭＥＮＴＳＡＮＤＣＯＭＰＯＳＩＴＥＩＮＤＥＸＥＳ（~（２１０）ＰｏＡＮＤＯＴＨＥＲ... 相似文献
4.
《Scientia Geologica Sinica》1997,(1)
ＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＶＯ－ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．TXＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＥＶＯ┐ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．ＳｕｎＪｉｍｉｎ，ＤｉｎｇＺｈｏｎ... 相似文献
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6.
《Scientia Geologica Sinica》1997,(1)
ＭＩＣＲＯＳＴＲＵＣＴＵＲＡＬＦＥＡＴＵＲＥＳＯＦＤＵＣＴＩＬＥＳＨＥＡＺＯＮＥＯＮＴＨＥＮＯＲＴＨＥＲＮＭＡＲＧＩＮＯＦＨＯＨＸＩＬ，ＱＩＮＧ－ＨＡＩＰＲＯＶＩＮＣＥ，ＣＨＩＮＡTXＭＩＣＲＯＳＴＲＵＣＴＵＲＡＬＦＥＡＴＵＲＥＳＯＦＤＵＣＴＩＬＥＳＨ... 相似文献
7.
《Scientia Geologica Sinica》1998,(1)
ＳＯＭＥＦＥＡＴＵＲＥＳＯＦＴＨＥＰＥＲＭＩＡＮＴＲＩＡＳＳＩＣＧＡＳＴＲＯＰＯＤＦＡＵＮＡＳＩＮＣＨＩＮＡＰａｎＹｕｎ－ｔａｎｇＧｒａｄｕａｔｅＳｃｈｏｌ,ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎｃｅａｎｄＴｅｃｈｎｏｌｏｇｙｏｆＣｈｉｎａ,Ｂｅｉｊ... 相似文献
8.
《Scientia Geologica Sinica》1997,(2)
ＡＮＥＶＩＤＥＮＣＥＯＦＣＡＲＢＯＮＩＳＯＴＯＰＥＴＯＴＨＥＤＥＴＥＭＩＮＡＴＩＯＮＯＦＴＨＥＣＡＲＢＯＮＩＦＥＲＯＵＳ／ＰＥＲＭＩＡＮＢＯＵＮＤＡＲＹTXＡＮＥＶＩＤＥＮＣＥＯＦＣＡＲＢＯＮＩＳＯＴＯＰＥＴＯＴＨＥＤＥＴＥＲＭＩＮＡＴＩＯＮＯＦＴＨＥ... 相似文献
9.
《Scientia Geologica Sinica》1998,(1)
ＰＲＯＶＥＮＡＮＣＥＡＮＡＬＹＳＥＳＯＦＬＡＴＥＰＡＬＥＯＺＯＩＣＣＬＡＳＴＩＣＳＩＮＴＨＥＫＡＭＵＳＴＥＡＲＥＡ,ＴＨＥＪＵＡＧＧＵＲＢＡＳＩＮ,ＸＩＮＪＩＡＮＧＺｈａｎｇＸｉａｏｈｕｉＩｎｓｔｉｔｕｔｅｏｆＧｅｏｌｏｇｙ,ＣｈｉｎｅｓｅＡｃａｄｅ... 相似文献
10.
《Scientia Geologica Sinica》1997,(4)
ＧＥＮＥＴＩＣＳＥＱＵＥＮＣＥＳＯＦＧＯＬＤＤＥＰＯＳＩＴＳＩＮＥＰＩＣＯＮＴＩＮＥＮＴＡＬＯＲＯＧＥＮＣＭＩＮＥＲＡＬＩＺＡＴＩＯＮＺＯＮＥ———ＴＨＥＴＥＣＴＯＮＩＣＭＥＴＡＭＯＲＰＨＩＣＭＩＮＥＲＯＧＥＮＩＣＢＥＬＴＩＮＴＨＥＡＩＬＡＯＳＨ... 相似文献
11.
提出了以聚四氟乙烯(PTFE)为氟化剂,氟化辅助ETV-ICP-AES测定难熔元素Nb、Ta、Zr和U的新方法。对待测元素的氟化蒸发行为进行了研究,并探讨了其相应的氟化蒸发机理。该法测定Nb、Ta、Zr和U的线性范围达4个数量级,检出限分别为50、90、16和120pg。 相似文献
12.
Ruthenium, palladium and iridium have been determined in 27 international reference rocks, ores and related materials by inductively-coupled plasma mass spectrometry using isotope dilution and sample introduction by solution nebulization and electrothermal vaporization, after chemical separation by co-precipitation with tellurium. The accuracy of the procedure is discussed by comparison of the results obtained with synthetic solutions and standard samples. 相似文献
13.
大试管回流消解-等离子体发射光谱／质谱法测定植物样品中多元素 总被引：2，自引：1，他引：2
采用大试管和红外加热的多孔控温消解炉的简单装置消解植物样品，电感耦合等离子体发射光谱／质谱法测定其中的主量和痕量元素，对消解温度、消解时间、消解溶剂、样品取样量等条件进行考察。用植物国家一级标准物质进行前处理及测定，验证方法的可行性，测定值与标准值基本吻合。方法不仅能同时测定B、Ba、Ca、Cd、Cu、K、Mg、Mn、Na、Ni、P、S、Zn、CoSr、Pb、Cr等元素，还适用于Hg、As挥发性元素的消解测定。方法的精密度（RSD，n=10）≤10％。 相似文献
14.
电感耦合等离子体发射光谱分析商代原始瓷样 总被引：4，自引：2，他引：2
采用Ｌｉ２ＣＯ３－Ｈ３ＢＯ３熔融和ＨＦ－ＨＮＯ３－ＨＣｌＯ４酸分解样品,电感耦合等离子体原子发射光谱法同时测定古陶瓷样品中１８种主,次量元素,讨论了前处理过程中的一些问题,并造反了最佳实验条件。方法经国家一级标准物质验证,测定结果与标准值吻合,大多数元素的ＲＳＤ（ｎ＝１０）〈５％。 相似文献
15.
All platinum-group metals (PGM) in ashed plant tissues, from an area of platinum mineralization in Saskatchewan, have been measured by neutron activation analysis of a NiS fire assay bead. Concentrations of up to 1350 ppb (ng/g) Pd, 880 ppb Pt, 49 ppb Rh, 37 ppb Ru, 24 ppb Ir, and 15 ppb Os occur in ashed twigs of black spruce (Picea mariana), indicating that the ratios of PGM uptake are about the same as those occurring in the bedrock. Plants growing on drift-covered diabase, known to have about 100 ppb PGM, contain up to 77 ppb Pt in ash, demonstrating the potential value of biogeochemical methods in helping to delineate platiniferous zones. Twigs of black spruce, jack pine, and labrador tea appear to be the optimum sample media in this environment.A rapid multi-element neutron activation analysis by direct irradiation of tissue permits measurement of 0.05 ppb Ir in dry material, or 2 ppb Ir in ashed samples. In view of the normally very low concentrations of Ir in plants, any detectable Ir probably indicates enrichment of PGM in the substrate.Comparison of several wet-chemical analytical methods indicates that the optimum (cost-effective) technique for detecting 1–2 ppb Pt, Pd, or Rh in 2-g samples of ash is by Te co-precipitation (following fusion and dissolution), and analysis by ICP-MS with sample introduction by electrothermal vaporization. However, care must be taken to ensure complete dissolution of all PGMs in the ash. 相似文献
16.
发展了一种新型的氢化物发生装置———可移动还原床氢化物发生器（ＭＲＢＨＧ）。应用该技术可将经毛细管区带电泳（ＣＺＥ）分离之后的各种砷的化合物转换为相应的氢化物,然后再被引入到电感耦合等离子体发射光谱（ＩＣＰ－ＡＥＳ）进行检测。对不同形态砷的不同化合物的ＣＺＥ分离条件进行了优化,包括缓冲溶液的ｐＨ值及浓度、进样量等。ＣＺＥ－ＭＲＢＨＧ－ＩＣＰ－ＡＥＳ应用于４种砷化合物的定量测定,峰面积的ＲＳＤ（ｎ＝５）在１．９％～１１．７％。４种砷的浓度检出限分别为：Ａｓ（Ⅲ）、甲胂酸和Ａｓ（Ⅴ）０．３２ｍｇ／Ｌ,二甲胂酸钠０．３５ｍｇ／Ｌ 相似文献
17.
不同氢化反应条件下原子发射光谱同时测定锗锡砷锑铋 总被引：7，自引：0，他引：7
研究了不同氢化反应条件下电感耦合等离子体原子发射光谱同时测定锗,,锡,砷,锑和铋的方法。主要对锗,锡的氢化反应酸度,缓冲溶液的选择,动态线性范围,氧化剂的选择,共存元素的干扰及其消除进行实验。方法经国家一级标准物质分析验证,结果与标准值基本相符。 相似文献
18.
This paper combines analytical and numerical studies of light oil recovery by air injection. We investigate in detail the internal structure of oxidation fronts in two-phase flow in a porous medium, taking into account reaction, vaporization, and condensation of liquid fuel, with longitudinal heat conduction. Our solution shows that between regimes of total and partial oxygen consumption there is a change in the oxidation wave, which may have negative implications for oxygen breakthrough in light oil recovery process. In spite of the simplifications used to derive the analytical solution, the latter agrees with direct numerical simulations. Finally, based on our analytical solution, we provide a phase diagram to predict conditions for total or partial oxygen consumption in light oil recovery process. 相似文献
19.
新型的氢化物发生技术－可移动还原床氢化物发生器可以实现微升级样品的测定而不需要对样品进行酸化和使用气－液分离器。应用ＭＲＢＨＧ－电感耦合等离子体发射光谱取得了同等质量的而不同形态的Ａｓ,Ｓｅ的相同信号强度,证明了在ＭＲＢＨＧ体系中氢化物元素之间的干扰得到消除,方法用于合金钢,富硒茶叶等实际样品的测定,标准加入的回收率在９３％－１１４％。 相似文献
20.
Impact cratering is usually associated with the partial or complete vaporization of the high-temperature impact melts. According to its chemical characteristics, the vaporization of major oxides, silicate minerals, and rock melts can be classified into the following four types: (1) congruent vaporization without decomposition of the compound in the vapor phase, (2) congruent vaporization with the decomposition of the compound in the vapor phase, (3) incongruent vaporization, and (4) cluster vaporization. The latter type of vaporization pertains to the transfer of material into vapor phase in the form of complicated atomicmolecular groups (clusters) of certain stoichiometry. Cluster vaporization takes place at superhigh temperatures typical of impact processes. The clusters can comprise compounds of different individual volatility, and this often results in the enrichment of the vapor phase in elements traditionally thought to be refractory. Examples of cluster vaporization are offered by lately obtained experimental results on laser-pulse vaporization of larnite, merwinite, and wollastonite. Condensed vapor generated at the vaporization of orthosilicates (larnite and merwinite) was proved to be dominated by chain bonds of Si-O tetrahedrons and to contain molecular groups of wollastonite and pseudowollastonite stoichiometry. 相似文献