电感耦合等离子体光谱法测定铜矿中砷的含量     

黄春晖 《南方国土资源》2007,(8):48-49,52

采用电感耦合等离子体发射光谱法(简称光谱法)测定铜矿中砷的含量.光谱法用硝酸溶解样品,无须分离铜、铁、硅等元素,直接于全谱直读等离子体发射光谱仪上测定砷含量.克服了传统铜矿中砷分析方法步骤繁琐、耗时长、工作量大,以及需特殊装置的不足.该方法测试准确、可靠,可满足铜矿中砷的分析要求.  相似文献   

基础地理信息动态更新技术体系初探   总被引：15，自引：2，他引：13  

陈军  赵仁亮  王东华 《地理信息世界》2007,5(5):4-9

近年来,我国测绘部门完成了国家级基础地理信息数据库的"初始建库",基础测绘工作重点已转向持续更新和灵性服务。未来的基础地理信息"应需适时更新"将体现更新内容灵性化、更新周期适时化、更新方式多元化等特点,其主要业务模式包括变化监测、变化测定、主数据库更新和产品更新及服务四大部分。为了有效开展"应需适时更新",应构建包括动态监测与数据预处理、变化信息采集与处理、数据库与产品更新、更新信息网络化服务四大主体部分的动态更新技术体系。该体系是信息化测绘技术体系的一个重要组成部分,应加强对其关键技术的研发,开展技术装备成套化和业务体系建设。  相似文献   

鹿鸣钼矿工作方法选择与物性参数测定     

刘志斌 《黑龙江国土资源》2008,(6):55-55

鹿呜钼矿工作方法选择与物性参数测定目的是利用激电中间梯度法对已知矿体的外部延伸情况进行了解，确定其走向，并寻找设计区域内与已知矿体相类似的异常，以期发现新的矿体。  相似文献   

Determination of trace and rare-earth elements in Chinese soil and clay reference materials by ICP-MS   总被引：2，自引：0，他引：2  

Ye Liu  Chunrong Diwu  Yan Zhao  Xiaoming Liu  Honglin Yuan  Jianqi Wang 《中国地球化学学报》2014,33(1):95-102

Inductively coupled plasma mass spectrometry(ICP-MS) has become a powerful tool for providing reliable analytical results in many laboratories around the word. In this study, the mixture of HF and HNO3 acids in high-temperature and high-pressure closed-vessel digestion technique were used to decompose some Chinese reference materials, and thirty seven elements were determined by ICP-MS. Most of the results for Chinese soil reference materials were found to be in reasonable agreement with the reference values, except Cs, Ta, Li, Ge, Zn, Nd, Tb and Ta whose values need to be revised. Their precisions were typically lower than 5% RSD. However, the Precisions of Chinese clay reference materials, especially for GBW03102 and GBW03102a, were significantly different with reference values, probably reflecting the existence of a coarser-grained fraction(70 μm) in samples, and the formation of fluorides in Al-rich samples during sample decomposition by using the mixture of HF and HNO3 acids. Moreover, thirty-seven trace elements covering the mass range from Li to U in four Chinese clay reference materials were firstly provided with good precision and accuracy in this study.  相似文献   

岩矿石标本真电参数的测试方法与测试系统(WXE)的研制     

王庆乙  邱钢  代丽  王生  徐立忠 《物探与化探》2014,(4)

现有岩矿标本电参数的测试系统,所测的都是视电参数。本文研究了测试岩矿标本真电参数的方法。它通过测试系统隐含的本底电参数,将实测的视参数转换为真参数。据此,研制了新型岩矿标本真电参数测试系统(WXE)。  相似文献   

Color-Redshift Relations and Photometric Redshift Estimations of Quasars in Large Sky Surveys     

Xue-Bing Wu  Wei Zhang  Xu Zhou Department of Astronomy  School of Physics  Peking University  Beijing  National Astronomical Observatories  Chinese Academy of Sciences  Beijing 《中国天文和天体物理学报》2004,4(1):17-27

With a recently constructed composite quasar spectrum and the X2 minimization technique, we describe a general method for estimating the photometric redshifts of a large sample of quasars by deriving theoretical color-redshift relations and comparing the theoretical colors with the observed ones. We estimated the photometric redshifts from the 5-band SDSS photometric data of 18678 quasars in the first major data release of SDSS and compared them with their spectroscopic redshifts. The difference is less than 0.1 for 47% of the quasars and less than 0.2 for 68%. Based on the calculation of the theoretical color-color diagrams of stars, galaxies and quasars both on the SDSS system and on the BATC system, we expect that we would be able to select candidates of high redshift quasars more efficaciously with the latter than with the former, provided the BATC survey can detect objects with magnitudes fainter than 21.  相似文献   

氢化原子荧光法测定化探样品中的砷、锑     

郭玉翠  王锐  袁蕙霞 《青海国土经略》2006,(1):44-46

应用AFS-820型双道氢化原子荧光光谱法同时测定化探样品中砷和锑,分析了测定准确性的影响因素,选择了合适的介质、酸度、还原剂浓度及仪器条件等。本方法对测定砷,锑的影响因素进行了实验,适用于1∶5万,1∶20万化探扫面样品的分析测定。  相似文献   

Medical geology：new relevance in the earth sciences     

CharlotteA.Bowman PeterT.Bobrowsky OlleSelinus 《《幕》》2003,26(4):270-278

The interdisciplinary fieldresponds to the need to betterof “Medical Geology“ understand the relationships between human health and our surrounding environment. The influence of earth resources, natural environmental factors and land-use on human health has long been recognized, dating back to ancient Rome and Peru‘s Inca civilization. Today links between the natural environment and health can be found throughout the world. This review introduces the historical context of this particular type of research, contrasts the direct geological and indirect natural hazard influences on healthas a framework of study, elaborates on pathways of elemental accumulation in the body and provides examples of specific geochemical behaviours and diseases that are often associated with either too much or not enough of certain elements which comprise the Earth.  相似文献   

原子吸收法测定矿泉水的镉元素     

刘新  李香龄 《黑龙江国土资源》2006,(1):47-47

镉及其化合物均为有毒物质，能够在人体的软组织中积累。过量积累时会引起心力衰竭、动脉血管硬化和高血压等多种疾病。因此，饮用天然矿泉水国家标准对镉含量规定了限值。  相似文献   

邻菲啰啉在测定亚铁中的保护效果          下载免费PDF全文

张会堂  刘瑄  刘渝燕  刘晶  巩宝珍 《山东国土资源》2003,19(1):54-56

样品在分解过程中 ,亚铁易被空气部分氧化 ,致使测试结果偏低 ,采用在HF H2 SO4溶矿过程中加入邻菲卟罗啉 ,与亚铁形成络合物 ,对保护亚铁具有较好的效果。拟定了在塑料坩埚中加邻菲卟罗啉、H2 SO4及HF ,中高温电热板溶矿 ,容量法测定样品中的亚铁 ,方法精密度为 0 .2 3% ,样品加标准回收率 98.8%～ 10 1.9%。此方法具有较好的应用效果  相似文献