GDX-502树脂富集高效液相色谱法测定地表水中酚类化合物   总被引：2，自引：2，他引：2  

何淼  饶竹  苏劲  黄毅 《岩矿测试》2007,26(2):101-104

采用自制GDX-502固相萃取小柱萃取水中苯酚、对硝基酚、间甲酚、2，4-二氯酚、2，4，6-三氯酚、五氯酚等6种酚类化合物，以乙腈作为洗脱剂，选择280nm和290nm双波长紫外高效液相色谱进行检测。结果表明，方法检出限为0．01-0．05mg／L，IL水的平均加标回收率为82．5％-95．0％，精密度（RSD，n=7）为3．6％-9．2％。方法用于实际地表水中痕量酚类化合物的检测，操作简单，有机溶剂用量少，分析效率高；萃取小柱可多次重复使用，分析成本低。  相似文献   

地幔流体的交代作用——来自碱性正长岩及其深源岩石包体的证据   总被引：2，自引：0，他引：2  

宋祥峰  刘显凡陶专卢秋霞  龙训荣 《岩石矿物学杂志》2007,26(4):310-314

滇西玉龙县小桥头硅化霓辉正长斑岩中,含有较多镁铁-超镁铁质深源包体岩石。经岩相学和电子探针及扫描电镜分析发现,伴随交代蚀变,寄主岩和各类镁铁-超镁铁质包体岩石中,普遍发育沿粒间和矿物晶体裂隙或解理纹贯入或穿插的黑色不透明物质,主要由微晶硅酸盐矿物和磁铁矿组成。本文研究认为,硅酸盐矿物与磁铁矿在背散射电子图像中表现为熔离特征,这种在透光显微镜下呈黑色不透明的微晶固体,是引发交代蚀变、具熔浆流体特点和超临界流体性质的地幔流体交代作用的一种微观表现。  相似文献   

凯里-麻江地区油苗与固体沥青的油源分析   总被引：15，自引：0，他引：15       下载免费PDF全文

张渠腾格尔  张志荣秦建中 《地质学报》2007,81(8):1118-1124

对黔南坳陷典型古油藏、残余油气藏的精细解剖对南方海相碳酸盐岩层系油气勘探研究具有重要意义。本文运用碳同位素、饱和烃色谱、饱和烃色质及芳烃色质等技术,对黔东南地区二叠系—寒武系油苗与固体沥青进行了地球化学特征研究和油源分析。研究表明,凯里地区虎庄47井原油、洛棉志留系砂岩油苗和麻江地区奥陶系红花园组固体沥青三者同源,主要来自下寒武统牛蹄塘组的优质烃源岩。而麻江地区早二叠世茅口组油苗与虎庄47井原油明显不同,主要源于下二叠统栖霞组的优质烃源岩。  相似文献   

Evaluation of Simultaneous Analyte Leaching/Vapour Phase Introduction for Direct Osmium Isotope Ratio Measurements in Solid Samples by Double-Focusing Sector Field ICP-MS     

Ilia Rodushkin  Emma Engström  Douglas C. Baxter 《Geostandards and Geoanalytical Research》2007,31(1):27-38

The analytical performance of a method for Os isotope ratio measurement by double‐focusing, sector field ICP‐MS (ICP‐SFMS) was evaluated. The method is based on several optimised, concurrent processes: Os extraction from samples in hot concentrated nitric acid; separation of Os from the digest solution by the formation of volatile osmium tetroxide accelerated by continuous hydrogen peroxide addition; transport of analyte vapour by an oxygen flow into the ICP; and isotopic determination by ICP‐SFMS. Due to the very efficient utilisation of analyte (approaching 0.5‰), Os isotope ratio measurement could be performed at low pg levels. Combined with an ability to process sample sizes up to 2 g (up to 50 g if the organic matrix of biological or botanical samples is eliminated by ashing), materials with Os concentrations in the low, or even sub pg g^?1 range could be determined by this method. Given that two complete digestion/distillation systems were available for interchangeable use, throughputs of up to fifteen samples per 8 hour shift could be achieved. The method precision, evaluated as the long‐term reproducibility of ¹⁸⁷ Os/¹⁸⁸Os ratio measurements in a commercial Os reference sample containing 0.5 ng Os, was 0.16% relative standard deviation (RSD, 1s). The method has been applied to perform replicate ¹⁸⁷ Os/¹⁸⁸ Os ratio measurements on a suite of fifty reference materials of various origins and matrix compositions, with Os concentrations varying from < 0.1 pg g^?1 to > 100 ng g^?1, yielding an average precision of 3% RSD. Though none of the materials tested are certified for Os content or Os isotope composition, comparison of the obtained data with published Os isotope information for similar sample types revealed close agreement between the two. The method can also be used for the simultaneous, semi‐quantitative determination of Os concentrations.  相似文献   

中国城市固体废弃物甲烷排放研究   总被引：2，自引：0，他引：2  

高庆先  杜吴鹏  卢士庆  Zhang Zhigang  Zhang Enchen  Wu Jianguo  Ren Zhenhai 《气候变化研究进展》2007,3(Z1):70-74

The greenhouse effect of methane (CH4) is only inferior to that of carbon dioxide (CO2). As an important anthropogenic emission source, the calculation of the emission amount of CH4 from waste treatment in landfills plays an important role in compiling greenhouse gases inventory and in estimating the climate change effects caused by increasing of greenhouse gases. Based on the previous work, and according to the sampling and analysis on municipal solid waste (MSW) in typical cities, the degradable organic carbon (DOC) percentile was identified in typical cities in recent years. According to the IPCC greenhouse gases inventory guideline and default method of CH4 emission from MSW landfills, and in light of MSW managing situation in different regions, the amount of CH4 emission was calculated. The results show that the amount of CH4 emission decreases geographically from east to west and it increases temporally from 1994 to 2004 in China.  相似文献   

全球水分布和气压变化对固体地球质心位置的影响   总被引：2，自引：0，他引：2  

周旭华 《天文学报》1998,39(1):61-66

根据IERS决议,国际地球参考系的原点是地球固体部分、海洋和大气的共同质量中心因此,地球上流体部分质量分布变化会改变固体地球质心相对于国际地球参考系原点的位置变化．空间技术如SLR和GPS的观测结果表明,固体地球质心可能有幅度达10毫米的位置变化,所以给出固体地球质心位置变化以及地球物理原因已成为重要问题.本文采用了全球4000多个地面气象台站从1949到1982年的月平均降水、温度和气压值,对水和大气的分布变化引起的固体地球质心位置变化进行了计算,得出水储量分布变化对固体地球质心运动比气压分布变化有更大的贡献,固体地球质心位置变化的最大值可达4毫米．  相似文献   

A coupled model for prediction of settlement and gas flow in MSW landfills     

L. Yu  F. Batlle  A. Lloret 《国际地质力学数值与分析法杂志》2010,34(11):1169-1190

Prediction of long‐term settlement and control of gas pollution to the environment are two principle concerns during the management of municipal solid waste (MSW) landfills. The behavior of settlement and gas flow in MSW landfills is complicated due to the combined effect of mechanical deformation of the solid skeleton and continuous biodegradation of the waste. A one‐dimensional settlement and gas flow model is presented in this paper, which is capable of predicting time evolution of settlement as well as temporal and spatial distribution of gas pressure within multi‐layered landfills under a variety of operating scenarios. The analytical solution to the novel model is evaluated with numerical simulation and field measurements. The resulting efficiency and accuracy highlight the capability of the proposed model to reproduce the settlement behavior and gas flow in MSW landfills. The influences of operating conditions and waste properties on settlement and gas pressure are examined for typical MSW landfills. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

基于主成分分析的相对重力观测零漂和固体潮提取     

于红娟  郭金运  李九龙  穆大鹏  孔巧丽 《大地测量与地球动力学》2015,35(5):906-910

利用主成分分析PCA提取2014-08-15~23CG-5相对重力仪静态相对观测的零点漂移和固体潮。结果显示,PCA提取的零点漂移值与最小二乘线性拟合结果非常一致,其差仅在10-2μGal/d量级;PCA估算的固体潮值与CG-5重力仪内部软件提供的固体潮模型计算值统计结果基本一致,两者之差均小于8μGal,均方根均小于5μGal。  相似文献   

中国南方存在印支期的油气藏——Re-Os同位素体系的制约   总被引：3，自引：0，他引：3  

陈玲  马昌前  凌文黎  佘振兵  陈子万 《地质科技情报》2010,29(2)

利用Re-Os同位素方法开展富含有机质的沥青、原油等的研究,是确定油气成藏时间和破坏时间有效的但极富挑战性的新途径,在国内尚无研究实例报道。以我国南方最大的古油藏之一的麻江古油藏中的沥青为主要对象,采用Re-Os同位素方法试图限定油气的成藏时间和破坏时间。研究表明,麻江古油藏的固体沥青Re、Os同位素质量分数分别在41.5×10-6～642×10-6和0.21×10-6～12.15×10-6之间,N(187Re)/N(188Os)比值较高,且变化范围较大,在270.90～4074.99之间,Os同位素组成指示中等放射成因,其N(187Os)/N(188Os)比值在0.3400～3.6557之间变化。所有沥青样品的模式年龄在28～144Ma之间变化,集中在85Ma左右。通过沥青Re-Os同位素研究,结合详细地质资料,认为麻江古油藏的成藏时间为印支期—早燕山期(144Ma之前),而油藏破坏时间为燕山晚期即85Ma左右。  相似文献   

固态存储水位精简摘录的研究          下载免费PDF全文

赵良民 《水文》2014,34(2):84-86

讨论了固态存储水位数据精简摘录存在问题及所需满足的要求。介绍了曲线矢量压缩的Douglas-Peucker算法,对它做了改进并应用于水位过程线的精简摘录。应用实例表明该法能够以精简的数据反应出水位变化完整过程,是使用计算机完成固态存储水位摘录的有效方法。  相似文献