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nondispersive     
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  无色散
     A simple, rapid and sensitive hydride generation nondispersive atomic fluorescence spectrometry method has been developed for the determination of trace Sb (Ⅲ) and Sb (Ⅴ) in water.
     本文报道了氢化物无色散原子荧光法测定水中痕量Sb(Ⅲ)和Sb(Ⅴ),方法简便、快速、灵敏。
短句来源
     A hydride generation nondispersive atomic fluorescence spectrometric method has been developed for the determination of trace Se (Ⅳ)and Se(Ⅵ)in water.
     应用氢化物无色散原子荧光法测定水中痕量硒(Ⅳ)和硒(Ⅵ).
短句来源
     DETERMINATION OF TRACE SELENIUM (Ⅳ) AND SELENIUM (Ⅵ) IN WATER BY HYDRIDE NONDISPERSIVE GENERATION ATOMIC FLUORESCENCE SPECTROMETRY
     氢化物发生无色散原子荧光光谱法分别测定水中痕量硒(Ⅳ)和硒(Ⅵ)
短句来源
     A non dispersive atomic fluorescence spectrometry combined with sodium borohydride reduction for the determination of mercury has been developed. Under the optimum conditions,there is a linear relationship between the fluorescence intensity and mercury concentration in the range of 0—25μg/L with correlation coefficient 0.9992.The detection limit is 0.02μg/L.
     建立了汞的硼氢化钠还原 -无色散原子荧光测定方法 ,在最佳条件下 ,荧光强度与汞浓度在 0— 2 5μg/ L范围内呈线性关系 ,相关系数为 0 .9992 ,检出限为 0 .0 2 μg/ L。
短句来源
     DETERMINATION OF TRACE SELENIUM AND TELLURIUM IN STEEL BY HYDRIDE GENERATION NONDISPERSIVE ATOMIC FLUORESCENCE SPECTROMETRY
     氢化物-无色散原子荧光法同时测定钢铁中痕量硒和碲
短句来源
更多       
  无色散
     A simple, rapid and sensitive hydride generation nondispersive atomic fluorescence spectrometry method has been developed for the determination of trace Sb (Ⅲ) and Sb (Ⅴ) in water.
     本文报道了氢化物无色散原子荧光法测定水中痕量Sb(Ⅲ)和Sb(Ⅴ),方法简便、快速、灵敏。
短句来源
     A hydride generation nondispersive atomic fluorescence spectrometric method has been developed for the determination of trace Se (Ⅳ)and Se(Ⅵ)in water.
     应用氢化物无色散原子荧光法测定水中痕量硒(Ⅳ)和硒(Ⅵ).
短句来源
     DETERMINATION OF TRACE SELENIUM (Ⅳ) AND SELENIUM (Ⅵ) IN WATER BY HYDRIDE NONDISPERSIVE GENERATION ATOMIC FLUORESCENCE SPECTROMETRY
     氢化物发生无色散原子荧光光谱法分别测定水中痕量硒(Ⅳ)和硒(Ⅵ)
短句来源
     A non dispersive atomic fluorescence spectrometry combined with sodium borohydride reduction for the determination of mercury has been developed. Under the optimum conditions,there is a linear relationship between the fluorescence intensity and mercury concentration in the range of 0—25μg/L with correlation coefficient 0.9992.The detection limit is 0.02μg/L.
     建立了汞的硼氢化钠还原 -无色散原子荧光测定方法 ,在最佳条件下 ,荧光强度与汞浓度在 0— 2 5μg/ L范围内呈线性关系 ,相关系数为 0 .9992 ,检出限为 0 .0 2 μg/ L。
短句来源
     DETERMINATION OF TRACE SELENIUM AND TELLURIUM IN STEEL BY HYDRIDE GENERATION NONDISPERSIVE ATOMIC FLUORESCENCE SPECTROMETRY
     氢化物-无色散原子荧光法同时测定钢铁中痕量硒和碲
短句来源
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  非色散
     MEASUREMENT OF THE ATMOSPHERIC CO_2 CONCENTRATION WITH THE NONDISPERSIVE INFRARED GASES ANALYZER
     用非色散红外气体分析仪进行大气CO_2本底浓度的测量
短句来源
     The trace mercury was determined in agaric and tremella fuciformis by Cold Atomic Fluorimetry with nondispersive fix of reduction and gasification,and the way of clearing up of wet method. It showed the recovery ratio was from 88.8% to 108.8%,and the error is little than 11.2%,the contents of mercury are 36.9 ng/g and 44.5 ng/g in agaric and tremella fuciformis.
     利用还原气化的非色散型装置 ,以湿法消解的方式 ,对木耳和银耳中的痕量汞进行了原子荧光测定 ,结果表明 ,试验回收率在 88 8%~ 1 0 8 8%之间 ,误差 <1 1 2 % ,木耳和银耳中的汞含量分别为 36 9ng/g和 44 7ng/g .
短句来源
     A CT-SPECTRAL ESTIMATE METHOD FOR ACC- UTATE EXTRACTING NONDISPERSIVE WAVES
     精确提取非色散波的CT—谱估计方法
短句来源
     A self-made nondispersive atomic fluorescence spectrometer is combined with a hydride generation technique for determination of arsenic.
     用一台自制的非色散原子荧光光度计与氢化法相结合测定痕量砷。
短句来源
     Determination of Total Organic Carbon in Surface Water and Waste Water Samples by Nondispersive Infrared Absorption Spectrometry
     非色散红外吸收法测定地表水和废水中的总有机碳
短句来源
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  无耗散
     In discussing the basic characteristics of the perturbation equations set which describes the generalized geostrophic current stability of the two dimensional adiabatic and non dispersive symmetry atmosphere, it is obtained that the system with these characteristics can be described by the unified form equations set.
     本文归纳总结了在绝热、无耗散对称二维大气中定常广义地转流稳定性分析中的扰动方程组的基本特征,并将其概括为具有这类问题共同基本特征的统一形式的扰动方程组的定解问题。
短句来源
     In this paper, discussing the stability of three classes of steady groundstate in the two dimensional compressible adiabatic and non dispersive atmosphere , it is exactly demonstrated that the stability of these groundstates is decided by their engine matrix Λ: a. the groundstates are stable if Λ is positive definite in set G+Γ.
     本文讨论了可压、绝热、无耗散的二维大气中三类定常基态的稳定性问题,并严格证明了这三类定常基态的稳定性性质是由基态的特征矩阵Λ的性质所决定的:a.若Λ在域G+Γ内处处为正定矩阵,则基态是稳定的;
短句来源

 

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  nondispersive
Determination of Mercury by Nondispersive Atomic Fluorescence Spectrometry
      
A nondispersive atomic fluorescence spectrometer for the determination of mercury by the cold-vapor technique has been developed.
      
This interaction with nondispersive optical phonons is transformed to the problem of mobile polarons using the canonical transformation of Lang and Firsov.
      
This phenomenon is explained by the possibility of forward stimulated Brillouin scattering, which is forbidden in nondispersive media.
      
The comparison of experimental data and theoretical predictions allows us to identify effects of the Coulomb correlations, namely, the presence of broad and nondispersive Hubbard bands in this system.
      
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A version of the nondispersive X-ray fluorescence method is described, in which readily available 241Am excitation source, Sn target, and scintillation detector are used.As some effective measures had been taken, the signal-noise ratio during determination is enhanced, and the operating stability of instrument is improved distinctly.The determination limit of this method is 30 mg U/1 and its relative standard deviation is +29%. Analytical results of on-stream determination of uranium mostly in the concentrations...

A version of the nondispersive X-ray fluorescence method is described, in which readily available 241Am excitation source, Sn target, and scintillation detector are used.As some effective measures had been taken, the signal-noise ratio during determination is enhanced, and the operating stability of instrument is improved distinctly.The determination limit of this method is 30 mg U/1 and its relative standard deviation is +29%. Analytical results of on-stream determination of uranium mostly in the concentrations range 50-100 mg U/1 in stripped organic phase in an existing uranium plant proved useful and effective for solvent extraction process control.

本文叙述了通过采取一系列技术措施,提高了方法的信噪比,使仪表的稳定性得到显著改善。对30毫克铀/升贫有机相的连续监测试验,相对标准偏差为±29%。经生产现场考核(在50~100毫克铀/升范围内的样品占80%)说明,该法能满足生产工艺监测贫有机相铀浓度的要求。

The process analyzers (PA) are undergoing rapid changes. In thispaper, the most important trends of development of PA are reviewed for the pur-pose of giving a general picture of the PA of the 80′s. The application of micro-processors in the design of PA is most fascinating, it will be extended to a lot ofsimpler, monocomponent PA, such as pH meters, ion activity meters, conductometers,nondispersive IR gas analyzers, etc. for correcting base-line shift, calibrating, dataprocessing, compensating for errors...

The process analyzers (PA) are undergoing rapid changes. In thispaper, the most important trends of development of PA are reviewed for the pur-pose of giving a general picture of the PA of the 80′s. The application of micro-processors in the design of PA is most fascinating, it will be extended to a lot ofsimpler, monocomponent PA, such as pH meters, ion activity meters, conductometers,nondispersive IR gas analyzers, etc. for correcting base-line shift, calibrating, dataprocessing, compensating for errors resulted from the changes of background com-position of sample and environmental conditions, controlling instrument operationand monitoring instrument working status, etc. in the next few years, although theuse of them today is primarily limited to several types of multicomponent PA.With an exception of gas chromatograph, the use of process multicomponent analy-zers was not popular in the past. But situation is changing rapidly. It is not un-safe to predict that the application of a series of process multicomponent analy-zers, especially liquid chromatographs, mass spectrometers, multicomponent IR ana-lyzers and x-ray analyzers will grow quickly. More and more efforts were put onthe exploitation and development of simple selective direct probes. The weakness ofearly developed direct probes was lessened or overcome due to the adoption ofmicrocomputers. The most attractive direct probes include ion-selective electrodes,solid state electrochemical transducers and optical probes. Composite probes inte-grated with microcomputers with the ability of eliminating complicated interferenceinfluence by mathematical compensation will be available. Another noteworthy trendis that great attention is paid to system design and the auxilliary parts of theanalyzer systems. "Prepackaged analyzer systems" were born in time, and somechanges in the concept, technologies and hardware design of sampling and samplepretreatment are expected to take place.

过程分析仪器处于快速变化之中。为窥测八十年代过程分析仪器的概貌,本文将探讨主要技术发展动向。微处理机的应用最引人注目,目前主要用于一些多组分分析仪器,预料其应用将扩展到一些较简单的单组分分析仪器。过去除气相色谱法外,多组分分析技术的在线应用很难普及。预计今后面貌将会改变,若干种过程谱仪将在许多生产流程中推广使用。探索和发展简易选择性直接探头的工作越来越受人重视,早期产品中所存在的弱点将因微处理机的采用而减轻或消除。系统设计和分析系统中分析仪器以外的辅助环节越来越受重视,所谓“预装分析系统”应运而生,取样和试样预处理概念、技术和系统设计将发生重大变革。

A self-made nondispersive atomic fluorescence spectrometer is combined with a hydride generation technique for determination of arsenic. Fluorescence measurement is based on the reduction of arsenic by potassium borohydride and introduction of its gaseous hydride into the electrically heated silica tube. The detection limit is 0.2 ppb or 1 ng. The reagent blank for a 5ml sample is ca. 5ng of arsenic. Analytical working curve is linear over ca. three orders of magnitude from the detection limit. The method...

A self-made nondispersive atomic fluorescence spectrometer is combined with a hydride generation technique for determination of arsenic. Fluorescence measurement is based on the reduction of arsenic by potassium borohydride and introduction of its gaseous hydride into the electrically heated silica tube. The detection limit is 0.2 ppb or 1 ng. The reagent blank for a 5ml sample is ca. 5ng of arsenic. Analytical working curve is linear over ca. three orders of magnitude from the detection limit. The method gives satisfactory results for the determination of trace amounts arsenic in the drinking water, waste water and human hair.

用一台自制的非色散原子荧光光度计与氢化法相结合测定痕量砷。荧光测量是建立在用硼氢化钾还原砷,并将砷的气体氢化物导入电加热石英管中原子化的基础上。砷的检出极限是0.2ppb或1ng。试剂空白在5毫升样品溶液中相当于5ng的砷。分析工作曲线的线性范围从检出极限算起约为3个数量极。该法应用于饮用水、废水和人发中痕量砷的测定,得到了满意的结果。

 
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