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全谱直读等离子体发射光谱法测定高纯金中的杂质元素 总被引:3,自引:0,他引:3
用新型号的全谱直读等离子体发射光谱仪测定了高纯金中的杂质元素,进行了分析谱线的选择,功率、气体流量等工作条件的优化,选用内标法校正标准溶液与样品溶液基体不同的影响。取样量为0.5g时,方法的测定下限为0.02~4.67μg/g,回收率在90%~101%,当待测元素含量大于5μg/g时,分析结果的相对标准偏差小于5%。方法用于实际样品的分析,结果与其他方法相符。 相似文献
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采用电感耦合等离子体发射光谱法测定硅铝丝(Al—1%Si)中Si及杂质元素Fe和Cu。确定了最少取样量和样品溶解方法,优化了元素分析谱线和仪器的测量条件。实验表明,方法的加标回收率为99%~1叭%,相对标准偏差(n=6)低于1.4%,Si、Fe、Cu的检出限分别为8.5、1.0和0.4μg/L。该方法应用于快速测定键合硅铝丝中的各种元素,结果满意。 相似文献
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电弧蒸馏光谱法测定化探样品中痕量银锡铅硼镓 总被引:13,自引:5,他引:13
报道了采用电弧蒸馏光谱法对化探样品中痕量Ag、Sn、Pb、B和Ga等元素的测定方法的改进。试验了多种缓冲剂的效果和分馏效应,选择了最佳工作电流、电极规格和内标元素。方法可以充分分馏待测元素,分离基体元素,消除由于基体元素进入弧焰所带来的背景干扰,并使待测元素的谱线强度大为增强,对Ag、Sn、Pb、B和Ga方法的检出限分别为0.01~1.0μg/g,精密度试验RsD(n=12)在5.4%~11.8%。方法经土壤国家一级标准物质分析验证,结果与标准值相符。 相似文献
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多目标地球化学调查土壤样品中氮和碳的快速测定 总被引:2,自引:1,他引:2
详细研究了元素分析仪的工作条件,建立了直接固体进样同时测定多目标地球化学调查土壤样苎支氮、碳的方法。方法简便、快速,检出限为氮14.5μg/g、碳0.013%。经土壤国家一级标准物质分析验证,测定值与标准值相符,精密度(RSD,n=12)为氮1.49%-3.27%、碳0.64%~3.63%。 相似文献
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铜精矿中铅锌的连续测定 总被引:2,自引:0,他引:2
利用铜铁试剂分离Cu、Fe等干扰元素,同时铜铁试剂与Pb和Zn产生络合物吸附波,可连续测定铜精矿中的Pb和Zn。体系中铅峰在-0.54V,锌峰在-0.99V,线性范围Pb为80~1600μg/LZn为120~1200μg/L,检出限Pb为40μg/L,Zn为80μg/L,测定结果与参考值相符,RSD(n=3)Pb(n=3)Pb〈6%,Zn〈10%。 相似文献
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微波消化在磷矿石样品制备中的应用 总被引:4,自引:2,他引:4
以微波HNO_3消化分解磷矿石试样,用ICP-AES进行多元素同时测定。该方法经磷矿石标准样品验证后,用于云南省九个地区磷矿中Ca、P、Fe、Al、Mg和K六种元素的分析,结果与经典酸分解方法制备样品的分析结果相符;同一样品平行测定9次,其各元素的相对标准偏差(RSD)在1.58%~4.41%。 相似文献
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有机螯合沉淀剂富集-感耦等离子体质谱法测定地球化学样品中痕量元素 总被引:1,自引:0,他引:1
报道了用吡咯烷二硫代氨基甲酸铵(APDC)有机螯合沉淀剂沉淀富集后,等离子体质谱法测定地球化学样品中26个痕量元素的方法。研究了APDC定量沉淀待测金属离子的条件,分别在pH2和pH7时使26个元素富集,回收率在94%~105%;样品测定下限为0.01~0.4μg/g;方法的RSD(n=10)为3%~13%。经几种地球化学标准物质验证,结果与推荐值相符。 相似文献
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电感耦合等离子体原子发射光谱法同时测定沉积岩中15个元素 总被引:2,自引:10,他引:2
采用电感耦合等离子体原子发射光谱法同时测定沉积岩样品中K、Na、Ca、Mg、Fe、Mn、Ni、V、Ga、Cu、Zn、Sr、Ba、Cr和B等15个元素。在应用混合酸处理样品的过程中,加入适量的甘露醇能够抑制硼的挥发。在优化选定的仪器条件中,15个元素的检出限为0.0010-0.032mg/L。对岩石国家一级标准物质GBW 07105~GBW 07108进行检测,各元素的测定值与标准值吻合。方法的回收率为93.3%~106.0%,测定结果的相对标准偏差(RSD,n=10)均小于5.2%。 相似文献
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报道了用吡咯烷二硫化氨基甲酸铵(APDC)有机螯合沉淀剂沉淀富集后,等离子体质谱法测定化学样品中26个痕量元素的方法,研究了APDC定量沉淀待测金属离子的条件,分别在PH2和PH7时使26个元素富集,回收率在94%~105%。样品测定了下限为0.01~0.4μg/g;方法的RSD(n=10)为3%~13%。经几种地球化学标准物质验证,结果与推荐值相符。 相似文献
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S. Viswanathan K. Surya Prakash Rao B. Mahabaleswar 《Journal of the Geological Society of India》2013,82(6):621-627
Komatiites are mantle-derived ultramafic volcanic rocks. Komatiites have been discovered in several States of India, notably in Karnataka. Studies on the distribution of trace-elements in the komatiites of India are very few. This paper proposes a simple, accurate, precise, rapid, and non-destructive wavelength-dispersive x-ray fluorescence (WDXRF) spectrometric technique for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in komatiites, and discusses the accuracy, precision, limits of detection, x-ray spectral-line interferences, inter-element effects, speed, advantages, and limitations of the technique. The accuracy of the technique is excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Zr, Nb, Ba, Pb, and Th and very good (within 4%) for Y. The precision is also excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th. The limits of detection are: 1 ppm for Sc and V; 2 ppm for Cr, Co, and Ni; 3 ppm for Cu, Zn, Rb, and Sr; 4 ppm for Y and Zr; 6 ppm for Nb; 10 ppm for Ba; 13 ppm for Pb; and 14 ppm for Th. The time taken for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in a batch of 24 samples of komatiites, for a replication of four analyses per sample, by one operator, using a manual WDXRF spectrometer, is only 60 hours. 相似文献
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奥地利安东帕有限公司 《岩矿测试》2009,28(3):306-306
最新的流行病学研究表明,空气中较高浓度的悬浮细颗粒可能对人类的健康有不利的影响。根据该项研究显示,由于心脏病、慢性呼吸问题和肺功能指标恶化而导致死亡率的升高与细尘粒子有关。这些研究结果已经促使欧盟于1999年4月出台了限制空气中二氧化硫、二氧化氮、氧化氮、铅和颗粒物含量的法案(1999/30/EC),对各项指标包括对可吸入PM10颗粒的浓度提出了新的限制性指标。PM10颗粒是指可以通过预分级器分离采集的气体动力学直径小于10μm的细颗粒。目前研究的兴趣重点逐步偏向PM2.5这些更细微颗粒物,PM2.5这种颗粒物对健康有明显的不利影响。在欧盟指令2008/50/EC中,对PM10和PM2.5都提 相似文献
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E. M. Prasolov S. A. Sergeev B. V. Belyatsky E. S. Bogomolov K. A. Gruzdov I. N. Kapitonov R. Sh. Krymsky V. O. Khalenev 《Geochemistry International》2018,56(1):46-64
This paper reports the first results of a study of 11 isotope systems (3He/4He, 40Ar/36Ar, 34S/32S, 65Cu/63Cu, 62Ni/60Ni, 87Sr/86Sr, 143Nd/144Nd, 206–208Pb/204Pb, Hf–Nd, U–Pb, and Re–Os) in the rocks and ores of the Cu–Ni–PGE deposits of the Norilsk ore district. Almost all the results were obtained at the Center of Isotopic Research of the Karpinskii All-Russia Research Institute of Geology. The use of a number of independent genetic isotopic signatures and comprehensive isotopic knowledge provided a methodic basis for the interpretation of approximately 5000 isotopic analyses of various elements. The presence of materials from two sources, crust and mantle, was detected in the composition of the rocks and ores. The contribution of the crustal source is especially significant in the paleofluids (gas–liquid microinclusions) of the ore-forming medium. Crustal solutions were probably a transport medium during ore formation. Air argon is dominant in the ores, which indicates a connection between the paleofluids and the atmosphere. This suggests intense groundwater circulation during the crystallization of ore minerals. The age of the rocks and ores of the Norilsk deposits was determined. The stage of orebody formation is restricted to a narrow age interval of 250 ± 10 Ma. An isotopic criterion was proposed for the ore-bearing potential of mafic intrusions in the Norilsk–Taimyr region. It includes several interrelated isotopic ratios of various elements: He, Ar, S, and others. 相似文献
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Mining induced subsidence can significantly affect mining costs where major surface facilities and natural environment need to be protected. Overburden grout injection is a technology used to control coal mine subsidence by injecting the mine waste material extracted from the coal back into the inter-burden rock during longwall mining. The flowing slurry is here categorised as a nonlinear viscous cohesive (Bingham plastic) fluid. During longwall mining the grout slurry is pumped into the separated beds of the rock mass through a central vertical borehole, which is drilled deep into the inter-burden rock strata above the coal seam. However, a blockage can occur in the injection system when the slurry velocity falls below a certain critical threshold velocity, indicating a material phase change from cohesive-viscous to cohesive-frictional. In situ field injection tests through boreholes have been simulated at a smaller scale at the CSIRO laboratory in Brisbane by pumping the slurry through a radial disk (gap = 4 mm) from its centre. Laboratory experiments indicate a general, nonlinear, cohesive, viscous, frictional model for shear behaviour of the slurry, in which the material shear parameters are functions of the disk radial distance. Complete dimensional and dimensionless analytical solutions have been developed based on an approach related to Bingham–Herschel–Bulkley fluid mechanics. The derived formulae include relations for minimum pump pressure, local pressure and pressure gradient, wall shear stress, volume rate, velocity and velocity gradient. The theoretical results match the experimental measurements. The experiments covered slurries with maximum particle sizes of 0.5 to 2 mm with about 50% being larger than 100 µm. The viscosities at the various solids concentrations were measured with a standard torsion viscometer. This study differs from the previous research in several distinct aspects, namely, consideration of the variable shear parameters rather than fixed values, inclusion of total nonlinear behaviour, and implementation of a friction function to mimic behaviour of the deposited and consolidating stiff slurry, which can cause a significant pressure rise as a result of the increased shear resistance. 相似文献
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Between 1985 and 1991, two new mountain protected areas (MTNPA) covering more than 35,000 km2 and based on participatory management models — the Makalu-Barun National Park and Conservation Area, Nepal, and Qomolangma Nature Preserve, Tibet Autonomous Region — were successfully established through the collaborative efforts of Woodlands Mountain Institute and conservationists in China and Nepal. Characteristics common to both projects include the importance of establishing (1) effective rationales, (2) local support constituencies, (3) a senior advisory group, (4) a task force, (5) linkages between conservation and development, and (6) fund raising mechanisms. The lessons derived from the experiences of Woodlands Mountain Institute are of significant value to others in preserving MTNPA. Increased collaboration and communication between all interested in conservation, however, will remain a critical component for expanding mountain protected area coverage to throughout the world. 相似文献
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《Applied Geochemistry》2001,16(2):137-159
Five hundred and ninety-eight samples of terrestrial moss (Hylocomium splendens and Pleurozium schreberi) collected from a 188,000 km2 area of the central Barents region (NE Norway, N Finland, NW Russia) were analysed by ICP-AES and ICP-MS. Analytical results for Al, B, Ba, Ca, K, La, Mg, Mn, Na, P, Rb, Si, Sr, Th, U and Y concentrations are reported here. Graphical methods of data analysis, such as geochemical maps, cumulative frequency diagrams, boxplots and scatterplots, are used to interpret the origin of the patterns for these elements. None of the elements reported here are emitted in significant amounts from the smelting industry on the Kola Peninsula. Despite the conventional view that moss chemistry reflects atmospheric element input, the nature of the underlying mineral substrate (regolith or bedrock) is found to have a considerable influence on moss composition for several elements. This influence of the chemistry of the mineral substrate can take place in a variety of ways. (1) It can be completely natural, reflecting the ability of higher plants to take up elements from deep soil horizons and shed them with litterfall onto the surface. (2) It can result from naturally increased soil dust input where vegetation is scarce due to harsh climatic conditions for instance. Alternatively, substrate influence can be enhanced by human activity, such as open-cast mining, creation of ‘technogenic deserts’, or handling, transport and storage of ore and ore products, all of which magnify the natural elemental flux from bedrock to ground vegetation. Seaspray is another natural process affecting moss composition in the area (Mg, Na), and this is most visible in the Norwegian part of the study area. Presence or absence of some plant species, e.g., lichens, seems to influence moss chemistry. This is shown by the low concentrations of B or K in moss on the Finnish and Norwegian side of the (fenced) border with Russia, contrasting with high concentrations on the other side (intensive reindeer husbandry west of the border has selectively depleted the lichen population). 相似文献
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Marta L. PATINO-DOUCE Alberto PATINO-DOUCE Mazhar QAYYUM Roger L. NIELSEN 《Geostandards and Geoanalytical Research》1994,18(2):195-198
We have developed a set of four synthetic standards for the rare earth and high field strength elements designed for use in the determination of those elements in silicates. The base material is a glass nominally at the eutectic of the MgO-Al2 O3 -SiO2 ternary system. The nominal doping level was 2 wt% of the elements as oxides. To avoid problems associated with peak interference, the elements were doped in four separate glasses. 相似文献