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international standard samples
相关语句
  国际标准样
     Determination of BSP—1 Hornblende for ~(40)Ar—~(39)Ar Method International Standard Samples
     ~(40)Ar—~(39)Ar法国际标准样BSP—1角闪石的测定
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  相似匹配句对
     Research of MSR in the International Standard
     国际标准“城域网多业务环(MSR)”的研究
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     INDICATIVE ABSTRACT OF THE INTERNATIONAL STANDARD
     国际标准简介(续)
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     INTERNATIONAL
     国际
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     Standard
     标准
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     International
     国际投资大事
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A method for the simultaneous determination of 8 rare earth elements inultrabasic rocks by neutron-activation analysis is described. Lanthanum, cerium,neodymium, samarium, europium, terbium, ytterbium and lutetium in eightsamples of periodate and harzburgite are analyzed. The rock samples are alltreated by chemical pre-treatment or radiochemical after-treatment in order toremove impurity elements and to enrich rare earth elements. This method ischecked and its reliability proved using Chinese geology standard...

A method for the simultaneous determination of 8 rare earth elements inultrabasic rocks by neutron-activation analysis is described. Lanthanum, cerium,neodymium, samarium, europium, terbium, ytterbium and lutetium in eightsamples of periodate and harzburgite are analyzed. The rock samples are alltreated by chemical pre-treatment or radiochemical after-treatment in order toremove impurity elements and to enrich rare earth elements. This method ischecked and its reliability proved using Chinese geology standard samples DZ∑-1,DZ∑-2, GSD-7 and international standard sample BCR-1. The method is suitablefor ultrabasic rocks of 0.1 ng to 1 μg of rare earth elements per gram sample.

文章介绍了用中子活化分析法分析超基性岩样中La,Ce,Nd,Sm,Eu,Tb,Yb,Lu等八个元素的全过程。分析了橄榄岩、斜辉辉橄榄岩等八种岩石样品,用我国地质标样DZ∑-1,GSD-7,DZ∑-2,及国际标样BCR-1验证了方法的可靠性。检出下限10~(-10)g/g。

A set-up for measuring the Compton profile has been established. The Compton profiles of H2O (international standard sample for comparison), Al (three different thicknesses), LiF and Cu have been measured, using 59.54 KeV γ-rays from a 210 mCi 241Am source at 165° fixed scattering angle. Analyses and discussions are given.Our results for water are in agreement with published measurements of some foreign groups within an allowance of±1%. It is suggested that the method and results are reliable.

本文介绍我们最近建立的用γ散射方法获取康普顿轮廓(Compton profile)数据的实验装置及初步测量的结果.采用的放射源为~(241)Am(210mCi),散射角为165°测量了国际标准校核样品:水.测量结果与国外发表的结果在±1%之内相符合,达到国际相互校核的水平.还测量了Al(三种不同厚度)、LiF和Cu样品.对测量结果进行了分析和讨论.

The thermal ionization mass spectrometry(TIMS) is used to determine the Quaternary geologie age of samples. Ages of some Chinese standard samples (stalagmite GBW04412 and GBW04413) and an international standard sample (coral RKM-4) were determined by the MAT-262 mass spectrometer. The results are in coincident with the certified values.

介绍用MAT-262质谱仪对国内石笋标样(GBW04412)、(GBW04413)和国际珊瑚标样(RKM-4)进行的测试,取得了与标准一至的结果。

 
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