石墨炉原子吸收法测定铝矾土中的硅   总被引：2，自引：0，他引：2  

徐铁民 《岩矿测试》1996,15(4):290-292

通过对照硅在热解石墨管、涂钼及涂钨石墨管中的原子化行为，选用涂钼石墨管和Ｌａ做基体改进剂，石墨炉原子吸收法测定铝矾土中的硅。经铝矾土管理样分析验证，方法可靠。实际样品分析结果与重量法和钼蓝法相符，对质量分数ｗ（ＳｉＯ２）在４％水平的铝矾土进行分析（ｎ＝５），其ＲＳＤ在１２％～１７％。  相似文献   

石墨炉原子吸收法测定地质样品中痕量银     

王兵  唐良宝 《铀矿地质》1996,12(3):180-184

本文介绍了采用硝酸、氢氟酸、高氯酸溶解试样，在５％的盐酸介质中，不经分离，直接测定地质样品中痕量银。银的检出限为５ｎｇ／ｇ，方法灵敏度２．０×１０－１２，相对标准偏差为４％，回收率９５％－１１５％。  相似文献   

Correlations of blast damage to ground surface targets with explosion seismic effect     

Qi Zhang  Da-chao Lin  Chun-hua Bai  Yan-yi Guo 《Soil Dynamics and Earthquake Engineering》2004,24(7):519-525

For an explosion resource, to evaluate its damage power to ground surface targets is an important problem. Two direct methods, measuring of air shock wave pressures generated by explosion and experimental observation of simulation target damage, are usually used to appraise this blast damage power. However, the measuring system of air shock wave pressures is not only very complex, but there are some problems to gauge the pressure sensors and the measured pressures often exhibit a strong scatter of data. In a simulation way, the used targets, easily damaged by explosion action, are not used once again so that there is the waste of materials. A measuring system of explosion seismic waves, with the characteristics being stable in operation and convenient to arrange the sensors of seismic waves, cannot be easily damaged in the process of experiment. If the explosion seismic strength is able to reflect the damage effects of explosion resources to ground surface targets, it is possible to suggest a new evaluation method based on the seismic effect, which, to large extent, will overcome the drawbacks of those two methods mentioned above. In this work, the potential of this new method is investigated experimentally. The experimental results show that under the identical ground-layer state and within a definite distance range, it is available to employ the explosion seismic effect to evaluate the damage power of explosion resources to ground surface targets.  相似文献   

悬浮液进样—石墨炉原子吸收光谱法测定琥珀中微量铅   总被引：3，自引：0，他引：3       下载免费PDF全文

陈世忠 《岩矿测试》2003,22(3):228-230

报道了以NH4H2PO4为基体改进剂，采用悬浮体制样石墨炉原子吸收光谱法直接测定琥珀中微量铅的方法。试验了影响测定的主要因素。在优化实验条件下。方法的检出限为0．038μg／g，Pb的质量浓度为0～80μg／L时，工作曲线线性关系良好。对于ω(Pb)=5．71μg／g样品的测定，相对标准偏差(RSD，n=5)为6．83％。  相似文献   

Dealkalization of Red Mud by Carbide Slag and Flue Gas          下载免费PDF全文

Xinke Wang  Yihe Zhang  Jingang Liu  Pan Hu  Ke Meng  Fengzhu Lv  Wangshu Tong  Paul K. Chu 《洁净——土壤、空气、水》2018,46(3)

  相似文献   

Heavy Metals in Black Crabs in the Atlantic Coast (Tenerife,Spain) – Human Risk Assessment     

《洁净——土壤、空气、水》2017,45(1)

  相似文献   

Colliding Blast Waves Driven by the Interaction of a Short-Pulse Laser with a Gas of Atomic Clusters     

Roland A. Smith  James Lazarus  Matthias Hohenberger  Alastair S. Moore  Joseph S. Robinson  Edward T. Gumbrell  Mike Dunne 《Astrophysics and Space Science》2007,307(1-3):131-137

Collisions between shocks are commonly found in many astrophysical objects, however robust numerical models or laboratory analogues of these complex systems remain challenging to implement. We report on the development of scaled laboratory experiments which employ new techniques for launching and diagnosing colliding shocks and high Mach number blast waves, scalable to a limited subset of astrophysically-relevant regimes. Use of an extended medium of atomic clusters enables efficient (>80%) coupling of 700 fs, 1 J, 1054 nm laser pulses to a “cluster” gas with an average density of ≈10¹⁹ particles cm⁻³, producing an initial energy density >10⁵ J cm⁻³, equivalent to ≈5×10⁹ J/g. Multiple laser foci are used to tailor the spatial profile of energy deposition, or to launch pairs of counter-propagating cylindrical shocks which then collide. By probing the collision interferometrically at multiple view angles in 5^{^} increments and applying an inverse Radon transform to the resulting phase projections we have been able to tomographicall reconstruct the full three-dimensional, time-framed electron density profile of the system.  相似文献   

Production of high titania slag by Electro-Slag Crucible Melting (ESCM) process     

M. Pourabdoli  Sh. Raygan  H. Abdizadeh  K. Hanaei 《International Journal of Mineral Processing》2006

In this research, ilmenite concentrate of Iran region successfully was smelted by Electro-Slag Crucible Melting (ESCM) process to produce TiO₂-rich slag as primary product and pig iron as by-product. Moreover, effects of reductant (carbon) amount and smelting time on TiO₂ and FeO content of slag and iron recovery were studied. It is found that addition of carbon excess to stoichiometric amount decreases the iron recovery and TiO₂ content in slag. If the smelting time keeps between 0 to 17 min, the TiO₂ content and iron recovery will be increased, whereas smelting time in excess of 17 min will cause products decline significantly. At optimum conditions, TiO₂ content in slag and the iron recovery are 70 wt.% and 84%, respectively. Kinetic studies proved that the reduction of equivalent FeO was first-order reaction. The studies made by X-ray diffraction analysis showed that formation of the titanium sub-oxides (Ti₃O₅ and Ti₂O₃) causes the decrease in iron recovery and TiO₂ content.  相似文献   

悬浮液进样石墨炉原子吸收光谱法测定环境样品中痕量铅          下载免费PDF全文

刘汉东  刘国珍 《地球科学》2000,25(5):532-535

提出了悬浮液进样石墨炉原子吸收光谱法测定环境样品中痕量铅的分析方法.讨论了悬浮颗粒粒径、悬浮液浓度、悬浮稳定剂、基体改进剂等因素对测定结果的影响.实验结果表明: 样品粒径 < 38μm, 以0.2g/L的Triton - 100为悬浮剂, 3g/L的(NH₄)₂HPO₄为基体改进剂, 电磁搅拌进样可简便快速地测定地质样品中的痕量铅, 方法的检出限为0.10ng/g, 精密度为3.31% (n =10).43GSD标样测定结果与推荐值一致   相似文献   

硫铁矿焙烧灰渣中铊分布规律及环境效应的研究   总被引：6，自引：0，他引：6  

谢文彪  陈永亨  陈穗玲  毕雪贞  范小苑 《矿物岩石地球化学通报》2000,19(3):204-206

利用分光光度法测定了铊在硫铁矿焙烧灰、渣中的含量,探讨了含铊硫铁矿燃烧后铊在灰渣中的集散规律及其对环境影响。结果显示硫铁矿焙烧灰渣中铊含量远高于克拉克值和土壤背景值;与原矿石相比,铊在炉灰中富集,炉渣中含量减少。硫铁矿燃烧产生的含铊灰渣对环境危害增大。  相似文献