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痕量钡
相关语句
  trace of ba
     Microwave digestion MICP-AES tests trace of Ba existing in steel
     微波消解ICP-AES法测定钢中痕量钡
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  “痕量钡”译为未确定词的双语例句
     Determination of Trace Barium in Water by WPGT Graphite Furnace Atomic Absorption Spectrometry
     涂钨热解石墨管-石墨炉原子吸收法测定天然水中痕量钡
短句来源
     Determination of Trace Barium in Mineral Water with Oxygen Enriched Air-acetylene Flame in Atomic Absorption Spectrometry
     富氧空气-乙炔火焰原子吸收光谱法测定矿泉水中痕量钡
短句来源
     DETERMINATION OF BARIUM IN WATER BY TANTALUM-LINED GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROPHOTOMETRY
     衬钽石墨炉原子吸收分光光度法测定水中痕量钡
短句来源
     Determination of Trace Barium in Rocks by Flame AAS
     火焰原子吸收法测定岩石中痕量钡
短句来源
     Catalytic Spectrophotometric Determination of Trace Barium Based on the Decoloration Reaction of Erichrome Black T and Dodecylbenzene Sulfonic Sodium
     催化褪色光度法测定痕量钡
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  相似匹配句对
     Catalytic Spectrophotometric Determination of Trace Barium Based on the Decoloration Reaction of Erichrome Black T and Dodecylbenzene Sulfonic Sodium
     催化褪色光度法测定痕量
短句来源
     Determination of Trace Barium in Rocks by Flame AAS
     火焰原子吸收法测定岩石中痕量
短句来源
     trace analysis;
     痕量分析;
短句来源
     The Determination of Trace Iron
     痕量铁的分析
短句来源
     (2) X-ray barium enema;
     2灌肠 ;
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A method for determination of trace barium in minerals by FAAS has been described. The interferences were studied and the optimum analytical conditions were found experimentally. The sensitivity is 0.2ng Ba per ml for 1% absorption. Coefficient of variation is 7.3% (n=15) for barium concentration of 0.500 μg per ml. The method proposed can be used for determination of barium ranging from 0.001 to 0.5%.

提出了无火焰原子吸收测定矿物中痕量钡的方法。实验研究了各种干扰,选取了最优测定条件。钡的灵敏度是0.2ng/mL/1%,0.50μg/mL浓度时变异系数为7.3%。方法可用于测定矿物中0.001—0.5%的钡。

A new indicating reaction is described in which catechol violet is oxidized to discolour by potassium bromate, and vanadium(Ⅴ)is used as catalyst andα,α′-dipyridyl as activator. The factors effecting the speed of reaction were investigated. A method for determining ultratrace vanadium(Ⅴ)was set up. The sensitivity of 9. 0×10~(-6)μgV(Ⅴ)/ml, the determination range of 0—0.12μg V(Ⅴ)/25 ml and the variation coefficient of 0. 84—3. 08% were obtained. The discolouring mechanism was explored, too.

本文研究了α,α′联吡啶作活化剂,钡(V)催化溴酸钾氧化邻苯二酚紫褪色的新指示反应和影响反应速度的因素,建立了测定痕量钡(V)的新方法。灵敏度为9×10~(-12)g钡(V)/ml,测定范围0-0.12μg钡(V)/25ml,相对标准偏差为0.84-3.08%。同时,对催化褪色反应的机理进行了探讨。

In a solution of pH 10 NH_4OH- NH_4CI media, DBC-chlorophosphonazo shows two peaks with singlesweep polarograph . When barium is added,these peaks disappear and a new stable reduction peak at - 1.15V appears, which height is proportional to the concentration of barium in the range from 5×10~(-9) to 7×10~(-8)mol/ L.The poloragraphic wave is due to the adsorption of the complex of Ba with DBC- chlorophosphonazo , and the ratio of barium to DBC-chlorophosponazo is 1:2.This method can be used to determine directly...

In a solution of pH 10 NH_4OH- NH_4CI media, DBC-chlorophosphonazo shows two peaks with singlesweep polarograph . When barium is added,these peaks disappear and a new stable reduction peak at - 1.15V appears, which height is proportional to the concentration of barium in the range from 5×10~(-9) to 7×10~(-8)mol/ L.The poloragraphic wave is due to the adsorption of the complex of Ba with DBC- chlorophosphonazo , and the ratio of barium to DBC-chlorophosponazo is 1:2.This method can be used to determine directly trace barium in water samples.

在pH10的NH_4OH-NH_4Cl介质中,DBC-CPA在示波极谱上产生两个还原峰、峰电位分别为-1.11V和-1.19V(vs.SCE)。加入钡离子后两峰消失。在-1.15V处出现一新的还原峰,峰形稳定,峰高与钡离子浓度在5×10~(-9)-7×10~(-8)mol/L范围内呈线性关系,配合物的组成比为Ba~(2+):DBC-CPA=1:2,极谱峰的性质为配合物吸附波,该波可直接用于水样中痕量钡的测定。

 
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