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   determination of nickel 的翻译结果: 查询用时:0.208秒
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determination of nickel     
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  镍的测定
     The method has been used for the determination of nickel in alloy steel samples with the RSD of 1.9%—2.1% and recovery of 97%—104%.
     方法用于合金钢中镍的测定 ,其相对标准偏差为 1.9%— 2 .1% ,标准加入回收率为 97%— 10 4 %。
短句来源
     . This method has been used for the determination of nickel in aluminum alloy samples with RSD of 2.7%-4.3%(n=5)
     方法用于合金中镍的测定,相对标准偏差(n=5)在2.7%~4.3%之间。
短句来源
     Synthesis of the New Reagent TADCAP and Determination of Nickel in Steel Samples
     新试剂TADCAP的合成及钢样中镍的测定
短句来源
     Study on the Spectrophotometry in Paraffin PhaseDetermination of Nickel
     蜡相分光光度法研究(Ⅰ)——镍的测定
短句来源
     Determination of Nickel in Adhesive
     粘合剂中镍的测定
短句来源
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  测定镍
     The method has been applied to the direct determination of nickel in nickel catalyst with satisfactory result. The recovery of standard addition is 97.5%~104.8%,with precision of 1.26%(RSD,n=6).
     该显色剂有良好的选择性,方法可以不经分离直接测定镍催化剂中镍的含量,加标回收率分别为在97.5%~104.8%之间,RSD(n=6)为1.26%。
短句来源
     Spectrophotometric Determination of Nickel(Ⅱ) with a New Reagent 3-p-Methylphenyl-5- (2′-Arsenoxylphenylazo)-Rhodanine
     3-对甲苯基-5-(2′-胂酸基苯偶氮)若丹宁光度法测定镍
短句来源
     Simultaneous determination of nickel,cobalt and copper with 5-Br-TAMB using CPA matrix method
     CPA矩阵法同时测定镍、钴、铜
短句来源
     SIMULTANEOUS DETERMINATION Of NICKEL & MANGANSE IN THE PRESENCE OF TRITON X-100 WITH 5-BR-PADAP BY SPECTROPHOTOMETRY
     非离子型表面活性剂TritonX-100存在下用5-Br-PADAP光度法联合测定镍
短句来源
     Simultaneous Determination of Nickel, Copper and Vanadium by Multi-Wavelength Linear Regression —Derivative Spectrophotometry
     多波长线性回归—导数分光光度法同时测定镍、铜、钒三组分混合物
短句来源
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  测定ni
     Determination of nickel (Ⅱ) by quenching of the fluorescence of aluminum (Ⅲ)-salicylaldehyde benzoylhydrazone
     Al(Ⅲ)水杨醛苯甲酰腙荧光熄灭测定Ni(Ⅱ)的研究
短句来源
     Determination of Nickel(Ⅱ) by Meta-Sulfonic Acid Azo Phenazone spectrophotometry
     间磺酸基偶氮安替比林光度法测定Ni(Ⅱ)的研究
短句来源
     An effective and simple method was suggested for the determination of nickel at ppb level by differential pulse polarography at hanging mercury drop electrode. In a medium of ammonium buffer solution,there appears a peak of nickel complex (Ni(NH3) 2+) at -0.94V (vs.Ag/AgCl sad KCI).
     本文对微分脉冲极谱法(DPP)测定镍的各种条件进行了试验,用NH_4OH沉淀分离试样中大量的铁、铝元素,同时又可以作为支持电解质进行镍的测定,Ni_(E_p)=-0.94V(vs.Ag/AgCl)检测下限达ppb,方法简单、快速,灵敏度较高,适于自然界环境污染物中镍的分析。
短句来源
     The determination of nickel based on its catalysis has been proposed by optimizing chemiluminescence conditions.
     依据Ni~(2+)的催化作用,通过条件优化实验,建立了测定Ni~(2+)的化学发光新方法。
短句来源
  测定镍的
     Study on Spectrophotometric Determination of Nickel(Ⅱ) with 2-(2-Quinolinylazo)-4-Diethylaminobenzoic Acid
     2-(2-喹啉偶氮)-4-二乙氨基苯甲酸光度法测定镍的研究
短句来源
     Study on the determination of nickel by reflexion scattering spectrophotometry with microcrystalline wax-phase
     微晶蜡相反射散射光度法测定镍的研究
短句来源
     A NEW SPECTROPHOTOMETRIC METHOD OF DETERMINATION OF NICKEL (II) WITH 2- (6-BROMO-2-BENZOTHIAZOLYLAZO)- 5-DIETHYLAMINOPHENOL IN THE PRESENCE OF SURFACTANTS
     一个新的测定镍的分光光度法—以2-(6-溴-2—苯骈噻唑偶氮)-5-二乙胺基苯酚作试剂
短句来源
     Determination of Nickel by Solid phase Reflection Spectrophotometry
     固相反射分光光度法测定镍的研究
短句来源
     Study on Spectrophotometric Determination of Nickel with o-Nitrophenyl Fluorone and Its Application
     邻硝基苯基荧光酮光度法测定镍的研究和应用
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  determination of nickel
Separate determination of nickel, zinc, and cobalt 4-(2-thiazolylazo)resorcinates in a sorbent phase using chromaticity measurem
      
The support filled with KU-2 is used for the sequential determination of nickel with dimethylglyoxime and copper with sodium diethyldithiocarbamate in 1 M HCl.
      
Another disk filled with an KU-2 cation exchanger was used for the simultaneous sorption of copper and nickel followed by the consecutive determination of nickel with dimethylglyoxime and copper with sodium diethyldithiocarbamate.
      
The conditions were optimized for the determination of nickel in the presence of copper and of copper in the presence of nickel after decomposing its dimethylglyoxime complex with 1 M HCl.
      
The optimized procedure was used for a thermal-lens determination of nickel(II) traces in heteropoly compounds and high-purity water.
      
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The possibility of using EDTA as a masking agent for copper in the photo-metric determination of nickel by the dimethyglyoxime method has been inves-tigated. It is found that (1) neither the color of the nickel nor that of the coppercomplex can be formed if EDTA is added before the dimethyg]yoxime reagent. (2)If EDTA is added aftet the color has been developed, the nickel complex remainsunchanged while the copper complex is destroyed; but in strong alkaline solution,the dimethylglyoxime-copper...

The possibility of using EDTA as a masking agent for copper in the photo-metric determination of nickel by the dimethyglyoxime method has been inves-tigated. It is found that (1) neither the color of the nickel nor that of the coppercomplex can be formed if EDTA is added before the dimethyg]yoxime reagent. (2)If EDTA is added aftet the color has been developed, the nickel complex remainsunchanged while the copper complex is destroyed; but in strong alkaline solution,the dimethylglyoxime-copper complex appears to be more stable, and cannot becompletely destroyed by EDTA. A method for the determination of nickel in the presence of a large amountof copper is described. By means of this method, small amount of nickel can bedetermined with great accuracy if the ratio of Cu/Ni does not exceed 1, 000: 1.Cobalt, manganese, and large amounts of chromium, vanadium and silver interfere. This method has been used in the determination of nickel in copper ore.

本文报告用丁二肟法比色测定镍时,用EDTA作为铜的隐蔽剂的可能性。找出:(1)若在加丁二肟前加EDTA,则镍及铜均不能形成丁二肟络合物。(2)若在先加丁二肟再加EDTA,则丁二肟镍不变,而相应的铜络合物破坏(在强硷性溶液中破坏不完全)。文中叙述在大量铜存在时少量镍的测定法。当铜量不超过镍一千倍时,可得准确的结果。钴、锰以及大量的铬、钒及银干扰。

Complexone 111 as a reagent for the amperometric titration of nickel,proposed by (2) and Reilly(3),was studied in detail and applied to the determination of nickel in anode slimes.It was found that the titration can be made at any suit- able voltage between—1.2 to—1.8 volts.As each portion of the reagent was added to the titration cell,equilibrium was obtained within two minutes,and the overall titration pro- cedure could be finished within 20 minutes.It has the advantage over the dimethylglyoxime method...

Complexone 111 as a reagent for the amperometric titration of nickel,proposed by (2) and Reilly(3),was studied in detail and applied to the determination of nickel in anode slimes.It was found that the titration can be made at any suit- able voltage between—1.2 to—1.8 volts.As each portion of the reagent was added to the titration cell,equilibrium was obtained within two minutes,and the overall titration pro- cedure could be finished within 20 minutes.It has the advantage over the dimethylglyoxime method in which each stable reading was obtained in approximately 15 minutes.The method is sensitive because nickel can be titrated at a concentration as low as 3×10~(-4) M.Silver and copper,both present in anode slimes interfere and must be separated prior to the titration. The anode slimes was dissolved in concentration sulfuric acid.Silver was removed as silver chloride and nickel was precipitated as nickel-dimethylglyoxime in the filtrate.The precipitate was dissolved in 6N hydrochloric acid and then titrated.The results,as compared with both the gravimetric and the dimethylglyoxime amperometric method,were satisfactory. The procedure is simple and rapid and each determination can be finished within one and a halt hours.

1.用氨羧络合齐Ⅲ作镍的电流滴定,在—1.2至—1.8伏特间进行滴定,再现性好,并且方法灵敏。镍的浓度在3×10~(-4)M 时,采用较稀的滴定剂,仍能得到满意的结果,也可应用于测定比较微量的镍。2.阳极泥中的 Ag~+离子及 Cu~(++)离子在测定过程起干扰作用。先用 AgCl 沉淀法分离 Ag~+离子;再用二乙醯二肟沉淀镍、比较大量的 Cu~(++)离子共存时,须进行二次的二乙醯二肟沉淀分离。3.应用本方法测定阳极泥中镍的含量,准确度达到重量法及二乙醯二肟电流滴定法的标准,而本方法有比较快速的优点。

1. The procedures for the polarographic determination of nickel and zinc in copper-nickel alloys and copper alloys in which the nickel amounts to 5 times the zinc have been worked out by the authors. 2. In a supporting electrolyte composed of 0.3 N (NH_4)_2 SO_4 and 1 N NH_4 OH, the concentration of nickel, in the range of 0.5—20 mg/50 ml, is found to be linearly proportional to the wave height, a condition suitable for the determination of nickel in copper alloys with high nickel...

1. The procedures for the polarographic determination of nickel and zinc in copper-nickel alloys and copper alloys in which the nickel amounts to 5 times the zinc have been worked out by the authors. 2. In a supporting electrolyte composed of 0.3 N (NH_4)_2 SO_4 and 1 N NH_4 OH, the concentration of nickel, in the range of 0.5—20 mg/50 ml, is found to be linearly proportional to the wave height, a condition suitable for the determination of nickel in copper alloys with high nickel content. The presence of NO_3~- does not interfere the determination of nickel. 3. In the precipitation of zinc with NH_4 CNS and methyl violet, when H_3PO_4 amounts to 4.5 ml in 50 ml, no dissolving of zinc is observed. Large amounts of NO_3~- and SO_4~- do not interfere. This separation method will be satisfactory when the amount of nickel present is as high as 200 times that of zinc, and also when the quantity of zinc is 0.2 mg. 4. To avoid time-consuming procedure of destruction of methyl violet by ignition, the precipitate of zinc methyl violet, together with the filter paper, is dissovlled in acid, and the methyl violet is precipitated on the addition of NH_4OH. No appreciable adsorption of zinc on methyl Violet precipitate and filter paper is found. 5. In the polarographic determination of zinc, a supporting electrolyte composed of 1N (NH_4)_2 SO_4 and 0.6N NH_4OH can be used. The concentration of zinc, in the range of 0.1—6.5 mg/50 ml, is found to be linearly proportional to the wave height. If a sample of 1 g. is used, 0.02% zinc can be determined satisfactorily. 6. The polarographic determination of nickd is compared with the volumetric method and that of zinc, with the colorimetric method, the results are satisfactory in both cases.

1.本文拟訂了鎳含量超过鋅含量五倍时,銅鎳合金及銅合金中鎳与鋅的极譜测定方案。 2.为适应高鎳銅合金中鎳的测定,确定了在0.3N(NH_4)_2SO_4和1N NH_4OH的解質中,鎳浓度在0.5—20毫克/50毫升范圍內与波高成直綫关系。NO~(3-)的存在,不影响鎳的测定。 3.用NH_4CNs、甲基紫沉淀鋅时,H_3PO_4用量达4.5毫升/50毫升时,尚不会使沉淀溶解。当鎳含量大于鋅含量200时,仍能满意的將鋅分离出来。大量NO_3~-及SO_4~-的存在,对沉淀鋅沒有影响。含鋅量为0.2毫克时,还可滿意的测定出来。 4.为了避免灰化、灼燒以破坏甲基紫的費时操作,作者將鋅的甲基紫沉淀連同濾紙一起放入容量瓶中,用酸溶解后,再加入NH_4OH、甲基紫随即成为絮狀沉淀析出。实驗証明,这种絮狀沉淀及濾紙,对鋅的吸附很小,不影响鋅的測定。 5.极譜法測定鋅时,可用1N(NH_4)_2SO_4和0.6N NH_4OH作为支持电解質。鋅的含量在0.1—6.5毫克/50毫升范圍内与波高成直线关系。如考虑称取1克样品,含鋅量达0.02%时,仍可满意的测定出来。 6.用容量法测定鎳及比色法测定鋅进行了比较,結果頗为一致。

 
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