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锌铅
相关语句
  zinc and lead
    Researh on the Testing Condition of zinc and lead in Copper Alloy
    铜合金中锌铅测定条件的探讨
短句来源
    EMULSION SAMPLING-FAAS DETERMINATION OF ZINC AND LEAD IN LUBRICATION OIL
    乳浊液进样-火焰原子吸收光谱法测定润滑油中锌铅
短句来源
  zn pb
    Detecting Cu,Zn,Pb,Ni and Mn in Soil with Microwave Digestion-AAS
    微波消解-火焰原子吸收法测定土壤中铜锌铅镍锰
短句来源
  zinc lead
    Determination of Trace Copper,Zinc,Lead and Gadmium in Seawater with Extraction-Axti-Extraction Seperation Atomic Absorption Spectrum Method
    萃取——反萃取分离原子吸收光谱法测定海水痕量的铜锌铅
短句来源
    Inductively Coupled Plasma-Atomic Emission Spectrometric Determination of Copper,Zinc,Lead and Nickel in Poplar Leaves
    电感耦合等离子体原子发射光谱法测定杨树叶中铜锌铅
短句来源
  “锌铅”译为未确定词的双语例句
    THERMODYNAMICS OF THE COORDINATION REACTIONS OF L-CYSTEINE WITH Fe Ni Zn AND Pb IONS
    L—半胱氨酸与铁镍锌铅离子配位反应的热力学
短句来源
    FAAS DETERMINATION OF COPPER ZINC CADMIUM LEAD AND NICKEL IN MUDDY SOIL
    火焰原子吸收光谱法测定污泥中铜锌铅镉镍
短句来源
    It is a Common practice to test Zn and Pb by EDTA Complexing titration or polarometry. But the accuracy and repetition of the results will always be affected by the test condition. This paper is about some useful research work of thetest of Pb and Zn in Copper alloy.
    铜合金中往往含有Pb、Zn、Ni、Co等多种成分,对其中锌铅元素的测定,多采用EDTA络合滴定法或极谱法.但往往因测定条件的不同,影响结果的精度和重观性,本文就铜合金中锌铅的测定条件作了一些有益的探讨.
短句来源
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  zinc and lead
Although the reaction of α,α-dibromo-α-fluorotoluene with zinc and lead involves formation of fluoro(phenyl)carbene, this procedure is not suitable for the synthesis of 2-fluoro-2-phenylaziridines.
      
The Use of the Mortality Rate of Marine Fish Prelarvae for the Estimation of Zinc and Lead Toxicity
      
According to the results of model experiments with artificial contamination of soil, the flux of zinc and lead from the starting point (from a medium loamy leached chernozem) to the final point (wheat grains) sharply decreases.
      
The adsorption of zinc and lead on hair was dependent on the acidity of the hair and/or the medium in which the hair sample was immersed, suggesting that hair is an ion exchanger.
      
Age- and sex-related differences in zinc and lead levels in human hair
      
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  zn pb
Cigaret smoking, despite its relatively low prevalence (19.5%), was associated with lower Zn and higher Cd and Pb concentrations and in lower Zn/Cd and Zn/Pb molar concentration ratios.
      
Smoking frequency appeared to show negative dose-response effects on maternal and neonatal Zn concentrations, Zn/Pb molar concentration ratios, and birth weight.
      
Un grand nombre de minéralisations de Zn(Pb) dans l'Ordovicien présentent un "faciès" de minerai identique mais sont encaissées dans des formations de lithologie variable.
      
Arrens Zn (Pb), Ba Devonian deposit, Pyrénées, France: an exhalative-sedimentary-type deposit similar to Meggen
      
These were an agricultural soil located nearby a Zn/Pb smelter and two soils from a steel metallurgical (siderurgy) waste land.
      
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  zinc lead
The reported experimental work on the systems PbOx-CaO and PbOx-CaO-SiO2 in air is part of a wider research program that combines experimental and thermodynamic computer modeling techniques to characterize zinc/lead industrial slags.
      
This research is part of a wider program to characterize zinc/lead industrial slags and sinters in the PbO-ZnO-SiO2-CaO-FeO-Fe2O3 system.
      


Deposition potentials of neodymium and yttrium ions on liquid Sb, Bi, Al, Ga, Sn, Zn, Pb and In cathodes and Solid Mo cathode in equimolar KCl·NaCl have been studied using technique of potential sweep voltammetry. The deposition potential differences between liquid cathodes and Mo cathode △ω have been calculated. These differences are not only due to decreased activity of neodynium and yttrium in liquid cathodes, shifting deposition potentials to oppositive direction but also the depolarization effect caused...

Deposition potentials of neodymium and yttrium ions on liquid Sb, Bi, Al, Ga, Sn, Zn, Pb and In cathodes and Solid Mo cathode in equimolar KCl·NaCl have been studied using technique of potential sweep voltammetry. The deposition potential differences between liquid cathodes and Mo cathode △ω have been calculated. These differences are not only due to decreased activity of neodynium and yttrium in liquid cathodes, shifting deposition potentials to oppositive direction but also the depolarization effect caused by alloying neodymium and yttrium with liquid cathode. The greater electronegativity differences between rare earth metals and liquid cathode materials, the greater is △ω. Effects of NdCl_3 and YCl_3 concentrations and temperature of the melt on deposition potentials of neodymium and yttrium ions and △ω have been studied as well. Corresponding equations are given.

用线性扫描伏-安法研究了等摩尔KCl·NaCl熔体中钕和钇离子在锑、铋、铝、镓、锡、锌、铅、钠八种液体阴极和固体钼阴极上析出电位,求出了析出电位差△ψ。产生△ψ的原因是稀土在液体阴极中的活度比在固体阴极上低,使析出电位向正移,同时也由于稀土与液体阴极合金化产生去极化作用的结果。稀土金属和液体阴极材料的电负性差越大,△ψ也越大。还研究了稀土氯化物浓度和熔体温度列稀土离子析出电位和△ψ的影响,给出了相应的关系式。

The conditions of direct determination of microgram quantities of uranium in organic phase with Arsenazo Ⅲ was investigated. A homogeneous phase was formed by the mixture of ethylene glycol monobutyl ether as the solvent, organic phase and aqueous solution. A definite amount of Ca, Zn, Pb, CO, Ni, Mn, Cu, Cd, Mg, Al, W, Mo, V and Cr etc metal ions did not disturb the determination of uranium. Fe, RE and Th could be masked by CyDTA added. A rapid and simple method had been developed for the determination of microgram...

The conditions of direct determination of microgram quantities of uranium in organic phase with Arsenazo Ⅲ was investigated. A homogeneous phase was formed by the mixture of ethylene glycol monobutyl ether as the solvent, organic phase and aqueous solution. A definite amount of Ca, Zn, Pb, CO, Ni, Mn, Cu, Cd, Mg, Al, W, Mo, V and Cr etc metal ions did not disturb the determination of uranium. Fe, RE and Th could be masked by CyDTA added. A rapid and simple method had been developed for the determination of microgram Quantities of uranium in DAMP—Kerosene or DAMP-N-hexane, and the pricise results of the determination had been got.

本文研究了以乙二醇丁醚作溶剂使有机相与水溶液混合而成均相,再以偶氮胂Ⅲ为显色剂直接测定有机相中微量铀的条件,适量的钙、锌、铅、钴、镍、锰、铜、镉、镁、铝、钨、钼、钒、铬等金属离子不干扰铀的测定,对于铁、稀上、钍的干扰,可以加入CYDTA掩蔽,方法应用于DAMP—煤油,DAMP—正已烷中微量铀的直接测定简便快速,易于掌握、结果稳定。

In the previous paper we found that when 1,2-diamino-N,N,N′,N′-tetraa-cetic acid(DCTA)was used as the titrant,malonic soid could only mask A(?) atpH 5.5 and using the DCTA-malonic acid masking method for the indirect titra-tion of A(?),over thirty metal ions,such as Zr,Th,Sn,Ti,Fe,RE.,Co,Ni,Cu,Zn,etc.will not interfere.The selectivity of the titration is exceptionallyhigh.In this paper,we further report that at pH 3.5-4 malonic acid is also agood masking agent for A(?).When we used the DCTA-malonic acid maskingmethod...

In the previous paper we found that when 1,2-diamino-N,N,N′,N′-tetraa-cetic acid(DCTA)was used as the titrant,malonic soid could only mask A(?) atpH 5.5 and using the DCTA-malonic acid masking method for the indirect titra-tion of A(?),over thirty metal ions,such as Zr,Th,Sn,Ti,Fe,RE.,Co,Ni,Cu,Zn,etc.will not interfere.The selectivity of the titration is exceptionallyhigh.In this paper,we further report that at pH 3.5-4 malonic acid is also agood masking agent for A(?).When we used the DCTA-malonic acid maskingmethod for the indirect titration of A(?),the selectivity is also very high,andparticularly it allows over 300 mg of Ca or Mg present.we have tested thatthis method is suitable for the determination of A(?) in magnesium alloys,copperalloys,silicates,bauxites,especially good for cement with high content of CaO,without any separation.

本文研究了以DCTA为螯合剂,丙二酸在pH值为4时隐蔽铝的性能,并用DCTA—丙二酸隐蔽法间接滴定铝.除发现铁,钛、钍、锆、铋、铜、镍、钴、锌、铅和锰等金属离子可共存外,还允许有大量钙、镁(300毫克以上)共存,特别适宜于含大量钙、镁的样品中铝的快速测定.

 
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