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standard rock sample
相关语句
  标准岩样
     STANDARD ROCK SAMPLE SELECTION FOR ROCK CRACKING IN DRILLING
     石油钻井岩石破碎标准岩样选择
短句来源
     This paper explains emphatically the importance of standard rock sample selection, develops the principles and methods of standard rock sample selection, establishes field points for four standard rock samples all over the country, and describes their mechanical properties.
     本文重点阐述了标准岩样选择的重要性。 制订了标准岩样选择的原则和方法,建立了四类标准岩样在全国分布的矿点,确定了标准岩样的物理力学性质。
短句来源
  “standard rock sample”译为未确定词的双语例句
     In order to test the reliability and applicability of our procedure, thegeocbemical standard rock sample BCR_1 has been measured in up to tenparallel runs. ~(147)Sm/~(144)Nd=0.13843+/- 5 (2 o.) and ~(148)Nd/~(144)Nd= 0.511837 +/- 3 (2 O _M) are obtained.
     稀释法测量美国标准样BCR-1检验,得到其~147Sm/~144Nd比值为0.13843±5(2σ_m),~143Nd/~144Nd比值为0.511837±8(2σ_m)。
短句来源
  相似匹配句对
     Standard
     标准
短句来源
     The Rock
     礁石
短句来源
     Which is the standard?
     采用什么标准评价?
短句来源
     The Standard for Engineering Classification of Rock Mass
     工程岩体分级标准的研究
短句来源
     STUDY ON HYGIENIC STANDARD OF ROCK WOOL FIBER IN WORKPLACES
     车间空气中岩棉粉尘卫生标准的研究
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In PIXE quantitative analysis the thin-target-method is routinely employed to av-oid sophisticated corrections for proton energy loss and X-ray absorption. However, it is extremely difficult to prepare a thin target, especially for powdered geological sam-ples. In this work the simple thick-target sampling technique was adopted and a micro-computer was employed for making corrections on the basis o'f the theory. In this way, 4 USGS standard rock samples were analyzed with reasonably good results achieved.All...

In PIXE quantitative analysis the thin-target-method is routinely employed to av-oid sophisticated corrections for proton energy loss and X-ray absorption. However, it is extremely difficult to prepare a thin target, especially for powdered geological sam-ples. In this work the simple thick-target sampling technique was adopted and a micro-computer was employed for making corrections on the basis o'f the theory. In this way, 4 USGS standard rock samples were analyzed with reasonably good results achieved.All the experimental work was done at the Lawrence Berkeley Lab (LBL), Univ. of California,USA. Samples were pelletized into a. φ8 X lmmhole on a .graphite substrate and then uniformly coated with aquadag to ensure good electric conductivity.The trace elements analyzed are Y, Zr, Rb. Sr, Th, Ge and Zn. The results are in substantial agreement with their certificated values with a relative error of 10-30% depending on the concentration, which is undoubtedly acceptable in view of trace elem-ent analysis.

质子激发X射线发射(PIXE)分析是近年发展起来的一种新的微量分析技术。由于传统方法所要求的薄靶制样等方面的困难,迄今它在地质样品方面的应用尚不多见。本工作针对地质样品的特点,尝试了简单、方便的厚靶制样法,并采用计算机处理技术解决了由此而引起的复杂的理论校正问题。对若干USGS岩石标准样作了试分析,结果是令人满意的,从而为微量元素的地球化学研究开辟了一条新的途径。

Procedures of Sm--Nd chemistry and mass--spectrometry established inthn Isotope Geology Laboratory of the Chengdu College of Geology aredescribed in detail. Samples are spiked with mixed tracers enriched in ~(150)Nd and ~(147)SM.Concentrations and the ~(147)Sm/~(150)Nd ratio of spike are precisely calibra-ted. Rare earth elements are separated from silicate samples on a Φ10×200cation exchange column using 4 mol/L HCl as elutriant. Pure Sm and Ndare further separated on a Φ2×400 capillary cation column using...

Procedures of Sm--Nd chemistry and mass--spectrometry established inthn Isotope Geology Laboratory of the Chengdu College of Geology aredescribed in detail. Samples are spiked with mixed tracers enriched in ~(150)Nd and ~(147)SM.Concentrations and the ~(147)Sm/~(150)Nd ratio of spike are precisely calibra-ted. Rare earth elements are separated from silicate samples on a Φ10×200cation exchange column using 4 mol/L HCl as elutriant. Pure Sm and Ndare further separated on a Φ2×400 capillary cation column using 0.2mol/L pH 4.48 a--HIBA as complex--elutriant. Sm and Nd are measured on a mass--spectrometer MAT261 in forms ofS'm~+ and Nd+. ~(148)Nd/~(144)Nd ratio is measured with precision of' 5×10~- 5or better. In order to test the reliability and applicability of our procedure, thegeocbemical standard rock sample BCR_1 has been measured in up to tenparallel runs. ~(147)Sm/~(144)Nd=0.13843+/- 5 (2 o.) and ~(148)Nd/~(144)Nd= 0.511837 +/- 3 (2 O _M) are obtained. Total chemical blank for Nd is 250×10~12 g, Sm is 50×10~12 g.Therefore, no blank correction for ~(147)Sm /~(144)Nd or~(143)Nd/~(144)Nd is necessaryin sample measurement..193.

本文报道了Sm,Nd的化学分离、质谱测定方面的工作结果。样品添加~150Nd-~147Sm混合稀释剂。首先以以HCl为洗脱剂,从硅酸岩样品中分离出稀土组分,再以α-HIBA为络合洗脱剂,从稀土组分中分离纯Sm,Nd。在MAT261质谱计上测定其同位素组成,~143Nd/~144Nd比值测定精度优于5×10~(-5)。稀释法测量美国标准样BCR-1检验,得到其~147Sm/~144Nd比值为0.13843±5(2σ_m),~143Nd/~144Nd比值为0.511837±8(2σ_m)。Nd全流程本底为250×10~(-12)g,Sm为50×10(-12)g。因此不必进行本底校正。

A new method has been developed for determining trace zirconium by derivative spectrophoptometry. A Zirconium-arsenazoⅢ complex was formed in a prechloric acid medium. Using fourth-derivative and △λ = l0nm, the apparent derivative molar absorption coefficient of this complex is 4.19× 105·L·mol-1·cm-1~I, which is 2.57 times higher than that of ordinary spectrophotometry.The detection limit is 0.016μg/10ml zirconium. A linear calibration curve is obtained in the range 0-10μg/10ml zirconium. This method has an...

A new method has been developed for determining trace zirconium by derivative spectrophoptometry. A Zirconium-arsenazoⅢ complex was formed in a prechloric acid medium. Using fourth-derivative and △λ = l0nm, the apparent derivative molar absorption coefficient of this complex is 4.19× 105·L·mol-1·cm-1~I, which is 2.57 times higher than that of ordinary spectrophotometry.The detection limit is 0.016μg/10ml zirconium. A linear calibration curve is obtained in the range 0-10μg/10ml zirconium. This method has an excellent selectivity and can be used to determine ppm level of zirconium in ordinary rocks containing rare earths, uranium, thorium, titanium phosphate and fluoride without separation. It is characterized by its simple operation procedure, good reproducibility and high accuracy. It has been successfully applied to the determination of zirconium in various standard rock samples.

本文研究了过氯酸介质中偶氮胂Ⅲ与锆形成的配合物并以导数法测定微量锆,采用四阶导数微分宽度为10nm时,该配合物摩尔导数吸光系数为4.19×10~5·L·mol~(-1)·cm~(-1),是普通光度法的2.57倍,其检出限为0.016μgZr/10ml,比普通光度法低2.7倍,工作曲线在0-10μgZr/10ml呈线性关系。有良好的选择性,对于普通岩石中含有的稀土、铀、钍、钛、磷酸根、氟根等不必分离,可用于测定岩矿中ppm级的锆。操作简便,重现性好,应用于各种岩矿标样分析,获得了满意的结果。

 
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