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  the column
    The results of column experiments show that Rh~(3+) is not adsorbed at certain concentrations of hydrochloric acid and passes through the column directly, Ft~(4+), Pd~(2+),Ir~(4+) are adsorbed on column, they can be eluted with ascorbic acid and different concentrations of thiourea acidic aqua respectively.
    试验结果表明在一定盐酸浓度时,Rh~(3+)不被固定相吸附,直接流出柱外,被吸附在柱上的Pt~(4+)、Pd~(2+)、Ir~(4+)可用一定浓度的抗坏血酸酸性溶液还原淋洗Ir~(4+),再用不同浓度的硫脲酸性溶液分别淋洗Pd~(2+)和Pt~(4+)。
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    The 50mg Pu(SO4)2.4H2O absorbed in the column can be desorbed by 5mL 4mol/L methanoic acid or 8mL mixed solution of 0. 2mol/L sulfuric acid and 0. 1mol/L nitric acid.
    吸附在柱上的钚可用4mol/LHCOOH或0.2mol/L H_2SO_4-0.1mol/L HNO_3混合酸作解吸剂。
短句来源
    The 50 mg Pu(SO4)2 ? 4H2O absorbed in the column can be desorbed by 5 mL 4mol/L methanoic acid or 8mL mixed solution of 0.2mol/L sulfuric acid and O. lmol/L nitric acid.
    吸附在柱上的钚可用4mol/L HCOOH或0.2mol/L H_2SO_4-0.1mol/LHNO_3混合酸作解吸剂。
短句来源
    In chapter two, a new method for the precise prediction of retention tune of solutes under linear gradient elution by simultaneously calibrating the effect of delay time of instrument and the distribution of mobile phase in the column on the migration of solutes was first proposed and validated by the prediction of retention time of 15 kinds of derivatised amino acids and eight benzene.
    在第二章中,首次提出了通过同时校正仪器滞后时间以及流动相在柱内分布对溶质输运过程的影响,准确预测溶质在线性梯度洗脱条件下保留时间的方法,通过对衍生化氨基酸和苯同系物保留时间的预测进行了验证。
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    The daughter product yttrium-90 belonging to stronium -90 is selectively separated on the column of poly (vinyl chloride) saturated with di (2 -ethylhexyl) phosphoric acid (HDEHP) via twice treatments.
    用HDEHP—聚氯乙烯为固定相,经过两次处理将~(90)Sr的子体~(90)Y选择性地分离在柱上,用稀酸洗涤后被6N HNO_3洗提下来。
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    On-Column Field-amplified Capillary Electrophoresis With Amperometric Detection
    毛细管电泳安培法检测中的在柱场放大效应
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    Eliminating Noise of On column Amperometric Detection Signal for Capillary Electrophoresis by Wavelet Transform
    毛细管电脉在柱安培检测信号的小波滤噪研究
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    Most of these methods not only required relatively complicated and expensive instruments, but also suffered from the incompatibility of separation conditions and CL detection conditions in many applications.
    其二是和分离技术相结合,如高效液相色谱,气相色谱,毛细管电泳等,但这些方法所需仪器昂贵,操作复杂,而且化学发光检测往往是在柱后进行,当分离条件和化学发光条件不相容时,则不能应用化学发光分析法来检测。
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    Quantitative determinations were carried out on PEGA column at 150--210℃(heating rate 2℃/min),flow rate of nitrogen 127ml/min,and a technique based on the peak area normalization method without correction was used.
    定量系采用(PEGA)柱,在柱温150—210℃,2℃/分,N_2流速127毫升/分的条件下,在氢焰离子化鉴定器上,以不加校正峯面积百分比定量。
短句来源
    L-Proline grafted on polyglycidylmethacrylate was able to be complexed withcopper(Ⅱ) ions and it could be used for the complete resolution of D, L-phe by columnchromatography, and D-enatiomer was eluated in front of the L-isomer.
    利用与铜(Ⅱ)离子络合的含L-脯氨酸聚甲基丙烯酸酯为固定相,在柱色谱上拆分D·L-苯丙氨酸,能够把D和L型完全拆分开,且D型先于L型流出柱子。
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  the column
After giving a suitable model for the cutting strips problem, we present a branch-and-price algorithm for it by combining the column generation technique and the branch-and-bound method with LP relaxations.
      
Some theoretical issues and implementation details about the algorithm are discussed, including the solution of the pricing subproblem, the quality of LP relaxations, the branching scheme as well as the column management.
      
We observed that the flow profiles of the scaled-up column were flat during the whole chromatographic process, and the efficiency and resolution of the column were also increased in accordance with theoretical prediction.
      
In the case of displacing (by the solution) thin oil films, which were preliminarily deposited onto the capillary surface, the advancing meniscus of the trisiloxane solution collects the column of oil from the film.
      
The process of bubble separation of substances using large gas bubbles totally closing the cross section of the column was investigated.
      
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Analysis of synthetic fatty acids by gas chromatography with flame ionization detector is described.The samples were methylated first,and the fatty acid methyl esters were separated on columns packed with 20% Apiezon L(APL)and 20% poly-1,3-butandiol succinate(PBDS)under isothermal conditions at 240 and 200℃ respectively,and on column with 10% polyethylene glycol adipate(PEGA)using temperature programming method.The relative retention volume data obtained on APL column are consistent with those reported in literature.Quantitative...

Analysis of synthetic fatty acids by gas chromatography with flame ionization detector is described.The samples were methylated first,and the fatty acid methyl esters were separated on columns packed with 20% Apiezon L(APL)and 20% poly-1,3-butandiol succinate(PBDS)under isothermal conditions at 240 and 200℃ respectively,and on column with 10% polyethylene glycol adipate(PEGA)using temperature programming method.The relative retention volume data obtained on APL column are consistent with those reported in literature.Quantitative determinations were carried out on PEGA column at 150--210℃(heating rate 2℃/min),flow rate of nitrogen 127ml/min,and a technique based on the peak area normalization method without correction was used.The average error for the odd number fatty acids(C_9—C_19) which being used as standards was found to be±3.47%.Total acid value of synthetic fatty acids sample calculated from the quantitative results is in good agreement with that of chemical determination.

本文叙述了测定合成皂用脂肪酸的气相色谱法,着重饱和脂肪酸的定量。用作标准的奇碳脂肪酸(C_9—C_19)系自行合成的,色谱柱和聚酯类液相亦为自制,方法为先将标准酸和皂用脂肪酸试样进行甲酯化,先后在Apiezon L柱(240℃)和聚1,3-丁二醇丁二酸酯(PBDS)柱(200℃),以及在聚乙二醇己二酸酯(PEGA)柱,于两种翟序升温的条件下进行定性分离,在Apiezon L柱上得到的保留数据和文献查得值核对基本一致。定量系采用(PEGA)柱,在柱温150—210℃,2℃/分,N_2流速127毫升/分的条件下,在氢焰离子化鉴定器上,以不加校正峯面积百分比定量。结果表明,对标准酸的分析误差平均为±3.47%,并测得了上海制皂厂生产的合成皂用脂肪酸含有C_8—C_21共14个组分,按照定量结果计算的酸值和化学法测得的数据相比,结果能很好相符。

An adsorption column with a column packing thinly coated with alumina was used for the rapid analysis of C_1—C_4 hydrocarbons at a column temperature of 40℃.Factors influencing the efficiency,selectivity,and stability of the column,such as properties of the support,methods of coating,content of alumina,time and temperature of heat-treatment, and deactivation of alumina surface,were studied.A preferred stationary phase was obtained by coating first the support with alumina by chemical method,and then with 0.1%...

An adsorption column with a column packing thinly coated with alumina was used for the rapid analysis of C_1—C_4 hydrocarbons at a column temperature of 40℃.Factors influencing the efficiency,selectivity,and stability of the column,such as properties of the support,methods of coating,content of alumina,time and temperature of heat-treatment, and deactivation of alumina surface,were studied.A preferred stationary phase was obtained by coating first the support with alumina by chemical method,and then with 0.1% squalane as detailing agent.Column packed with this stationary phase of 6 metres long and 0.4 cm in internal diameter could be used to separate methane,ethane, ethylene,propane,propylene,isobutane,n-butane,n-butene,isobutene,trans-butylene-2, and cis-butylene-2 within 10 minutes at 40℃.

在情性担体表面上用化学法涂渍20%氧化铝吸附层,再涂以0.1%异三十烷作去尾剂,使氧化铝表面钝化稳定。用装有上述固定相的长6米、内径0.4厘米的色谱柱,可在柱温40℃和10分钟内分离甲烷、乙烷、乙烯、丙烷、丙烯、异丁烷、正丁烷、正丁烯、异丁烯、反丁烯-[2]和顺丁烯-[2]等十一个组分。

In the present paper a method of extraction chromatography to the separation and determination of stronium - 90 in biological samples is reported. The daughter product yttrium-90 belonging to stronium -90 is selectively separated on the column of poly (vinyl chloride) saturated with di (2 -ethylhexyl) phosphoric acid (HDEHP) via twice treatments. After washing the column with the dilute acid yttrium-90 is eluted by 6N HNO3. The chemical recovery of stronium is estimated by atomic absorption spectrophotometry....

In the present paper a method of extraction chromatography to the separation and determination of stronium - 90 in biological samples is reported. The daughter product yttrium-90 belonging to stronium -90 is selectively separated on the column of poly (vinyl chloride) saturated with di (2 -ethylhexyl) phosphoric acid (HDEHP) via twice treatments. After washing the column with the dilute acid yttrium-90 is eluted by 6N HNO3. The chemical recovery of stronium is estimated by atomic absorption spectrophotometry. The chemical recovery of yttrium is estimated by the precipitation of oxalat. The radioactive content is measured by the low-background counting. The radiochemical recoveries by using 8sSr and "Y tracer are consistent with the chemical recoveries, >90%. Analytical results of the samples are perfectly satisfactory. The decontamination factors attain to >10J. The procedure has achieved simplicity, speed and accuracy. The method can be applied to determination of stronium-90 in biological samples of food health, environment protection and radioactive monitoring.

本文报道一种萃取色层分离和测定生物样品中~(90)Sr的方法。用HDEHP—聚氯乙烯为固定相,经过两次处理将~(90)Sr的子体~(90)Y选择性地分离在柱上,用稀酸洗涤后被6N HNO_3洗提下来。原子吸收分光光度法测定锶的化学回收率,草酸盐沉淀法测定钇的化学回收率,低本底计数测量放射性强度。~(85)Sr和~(90)Y示踪的放化回收率与化学回收率一致,大于90%.样品分析的结果令人满意,去污系数大于10~3。程序简便、快速而准确,适用于食品卫生、环境保护和放射性监测分析.

 
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