共查询到20条相似文献，搜索用时 46 毫秒
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样品用王水溶矿，制成１０％ＨＮＯ＿３溶液，通过Ｐ－３５０色谱柱，富集铀分离干扰元素，而后用０．２％ＮａＦ解脱铀，衔接５－Ｂｒ－ＰＡＤＡＰ光度法测定铀。 相似文献
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王铭和 《广东海洋大学学报》1994,(1)
根据对ＳＩＧＭＡ公司１９９２年产品目录中琼胶和琼胶糖的技术数据进行比较分析的结果认为，可以利用灰分或硫酸根含量这一主要数据作为指标，把它们划分为三个不同的质量等级，即琼胶（灰分３～６％）、纯化琼胶（灰分≤２．０％）和琼胶糖（硫酸根≤０．２０％～≤０．３５％） 相似文献
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本文报道了树脂相分光光度法测定地质样品中微量镁的研究。结果表明，利用国产７３２＃阳离子交换树脂作为载体，在碱性介质中，镁离子能够与镁试剂Ⅱ形成稳定的兰色配合物，使树脂载体里兰色，配合物的最大吸收波长为６５０ｎｍ，方法集分离、富集和测定于一体，其摩尔消光系数ε＝１．１２×１０５，ＲＳＤ＝５．３％，镁含量在０～３４μｇ／２５０ｍｌ范围内与吸收值Ａ成良好的线性关系，方法已应用于地质样品中微量镁的测定，取得满意的结果。 相似文献
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样品经低温稀王水溶解，在选定的仪器条件下，用氯化亚锡还原，测定汞的吸收峰值。方法简便、快速、价廉，适用于大批化探样品的测定。 相似文献
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采用多种酸溶矿（HCl-HNO3-HClO—HF）,利用电感耦合等离子体发射光谱仪,建立了适用于土壤、水系沉积物等样品中钡、铍等19种元素的同时测定方法。并用国家标准物质验证了方法的准确度和精密度,其相对误差均小于10％,样品12次测定的RSD为0．9％～5％。 相似文献
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植物样品在500℃灰化,用硝酸、氢氟酸和高氯酸分解,然后在2％的盐酸介质中,用火焰原子吸收分光光度法测定植物样品中的微量铜。该方法简单、快速、准确。方法的检出限为0.55×10~(-6),回收率97％—102％。对含量为5.14×10~(-6),9.43×10~(-6)和17.63×10~(-6)的三个植物样品进行分析,其相对标准偏差分别是4.62％、4.22％和2.00％。 相似文献
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Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area. 相似文献
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Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter. 相似文献
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《极地研究(英文版)》2014,(3)
正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied 相似文献
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《山地科学学报》2014,(4):I0004-I0009
<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet. 相似文献
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《山地科学学报》2014,(4)
<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by 相似文献
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References： 《极地研究(英文版)》2007,18(1):73-83
Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated. 相似文献
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《中国海洋大学学报(英文版)》2014,(3):I0001-I0001
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research 相似文献