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气相色谱法     
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  gas chromatography
    DIRECT ANALYSIS OF ACID WATER—TAIL GAS CONDENSATE FROM PARAFFIN WAX OXIDATION BY GAS CHROMATOGRAPHY Ⅱ.QUANTITATIVE ESTIMATION OF C_2--C6 NORMAL FATTY ACIDS
    石蜡氧化副产物——酸水的直接气相色谱法 Ⅱ.酸水中C_2—C_6正构酸的定量
短句来源
    Study of Organic Elemental Microanalysis by Gas Chromatography——Ⅱ.The Determination of Oxygen
    有机元素微量分析气相色谱法研究 Ⅱ.氧的测定
短句来源
    THE DETERMINATION OF ULTRA-MICRO AMOUNT OF RHODIUM IN METEORITES BY GAS CHROMATOGRAPHY
    气相色谱法测定陨石中超微量铑
短句来源
    STUDIES ON THERMAL STABILITIES OF COORDINATION COMPOUNDS BY GAS CHROMATOGRAPHY (Ⅶ)--THERMAL DECOMPOSITION OF Ni(Ⅱ), Co(Ⅱ) OXALATO COORDINATION COMPOUNDS AND CATALYTIC PROPERTY OF THEIR PRODUCTS
    气相色谱法研究配位化合物的热稳定性(Ⅶ)——Ni(Ⅱ)、Co(Ⅱ)草酸配合物的热分解及产物的催化性能
短句来源
    Some Improvements in the Extraction Apparatus Used in the Determination of Physiological Levels of Cr (Ⅲ) in Urine by Gas Chromatography
    气相色谱法测定尿中生理量Cr(Ⅲ)时所用萃取装置的改进
短句来源
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  gc
    ANALYSIS OF TRACE ORGANIC POLLUTANTS BY ADSORPTION INRICHMENT AND CAPILLARY COLUMNS GC—FID DETERMINATION
    吸附富集—氢焰双毛细管柱气相色谱法分析水中痕量有机污染物
短句来源
    DETERMINATION OF DIMETHYLSULFIDE IN SEAWATER AND DIMETHYLSULPHONIOPROPIONATE IN PHYTOPLANKTON CELLS BY HEADSPACE GC/FPD METHOD
    顶空气相色谱法测定海水二甲基硫和浮游植物细胞二甲基硫丙酸的研究
短句来源
    GC ANALYSIS OF α-ACETYL-γ-BUTYROLACTONE AND ITS RAW MATERIALS
    气相色谱法分析α-乙酰γ-丁内酯及其原料
短句来源
    GC Determination of Monomolecular Aldehyde in Low Molecular Aldehyde Reagents
    用气相色谱法对低分子量醛试剂中单分子醛测定研究
短句来源
    DETERMINATION OF VOLATILE ORGANOHALIDES IN WATER BY TWICE PHASE EQUILIBRATION/GC
    两次相平衡/气相色谱法测定水中挥发性氯代烃
短句来源
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  gas chromatograph
    DETERMINATION OF DOCOSAHEXENOIC ACID IN HUMAN SERUM BY CAPILLARY GAS CHROMATOGRAPH
    毛细管气相色谱法测定人血清中二十二碳六烯酸的浓度
短句来源
    Analysis of Micro-amount CO and CO_2 in Polymer Grade Propylene by Gas Chromatograph
    气相色谱法分析聚合级丙烯中微量CO、CO_2
短句来源
    Analysis of Alkyne Impurity Content in 1,3-Butadiene by Capillary Gas Chromatograph
    毛细管气相色谱法分析1,3-丁二烯中炔烃杂质含量
短句来源
    Discussion on gas chromatograph for analysis of 3-chloro-2-methylaniline
    3-氯-2-甲基苯胺的气相色谱法定量分析探讨
短句来源
    Determening ethylene 1,1-dichloro-1-fluoride by gas chromatograph
    气相色谱法测定1,1-二氯-1-氟乙烷
短句来源
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  gaseous chromatography
    Determination for the content of the Poltazen with gaseous chromatography
    气相色谱法测定保泰松的含量
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  gas chromatography
Acetone solution-casting films of poly(methylmethacrylate) were analyzed by differential scanning calorimetry and pyrolysis gas chromatography-mass spectroscopy under natural evaporation and ultrasonic vibration, respectively.
      
Determining the relative age of blue ballpoint ink by gas chromatography
      
The content of the volatile components in blue ballpoint pen ink were determined by gas chromatography (GC).
      
Compared with the results obtained by GC/qMS only, the analytical results obtained by these hyphenated methods of gas chromatography are more credible.
      
The volatile oil, the fraction of petroleum ether: EtOAc = 20:1 (V/V) on Si gel chromatography, was also quantitatively analyzed by gas chromatography mass spectrometry (GC-MS).
      
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  gc
A successful interpretation of the complex relationship between GC RIs of methyalkanes and the chemical structure is achieved using the QSPR method.
      
The content of the volatile components in blue ballpoint pen ink were determined by gas chromatography (GC).
      
Based on the mass spectra search function of GC/qMS with the aid of the discriminability of the geometrical isomer by GC/FTIR and the ability to determine the accurate mass charge ratio (m/z) by GC/oaTOFMS, 68 GC eluants were identified successfully.
      
Compared with the results obtained by GC/qMS only, the analytical results obtained by these hyphenated methods of gas chromatography are more credible.
      
The volatile oil, the fraction of petroleum ether: EtOAc = 20:1 (V/V) on Si gel chromatography, was also quantitatively analyzed by gas chromatography mass spectrometry (GC-MS).
      
更多          
  gas chromatograph
Detection of geosmin and 2-methylisoborneol by liquid-liquid extraction-gas chromatograph mass spectrum (LLE-GCMS) and solid pha
      
LC-18 column was employed in solid phase extraction (SPE), 1.0 mL of hexane was adopted in liquid-liquid extraction (LLE), and the extracts were analyzed by gas chromatograph mass spectrum (GCMS) in selected ion mode.
      
Rapid Determination of Explosives and Narcotics Using a Multicapillary-Column Gas Chromatograph and an Ion-Mobility Spectrometer
      
The kinetics of the buildup of carbonaceous products (coke) was investigated in situ during the catalytic reaction in a thermal analyzer coupled to a mass spectrometer and a gas chromatograph (TA-MS-GC).
      
Predictinga, c indices in reversed-phase high-performance liquid chromatography (RP-HPLC) from Kováts index in gas chromatograph
      
更多          
  gaseous chromatography
Our study is motivated by a model arising in the theory of gaseous chromatography, where the flux function appearing in the conservation law is obtained from a thermodynamical assumption of local equilibrium.
      
We conclude by applying the above ideas to two natural relaxations in this gaseous chromatography model.
      
  其他


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。

A simple gas chromatographic method has been developed for the analysis of gaseous impurities in the range of 2-100 ppm in butadiene. A high sensitive catharometer with tungsten filament was used as a detector; molecular sieves 5?, as adsorbent for the separation of H_2, N_2, O_2, CH_4 and CO; and ethyl acetoacetate, as stationary liquid for the separation of CO_2 and of C_1-C_4 gaseous hydrocarbons. The influence of the operation parameters on the minimum detectability has been discussed. Based on these considerations...

A simple gas chromatographic method has been developed for the analysis of gaseous impurities in the range of 2-100 ppm in butadiene. A high sensitive catharometer with tungsten filament was used as a detector; molecular sieves 5?, as adsorbent for the separation of H_2, N_2, O_2, CH_4 and CO; and ethyl acetoacetate, as stationary liquid for the separation of CO_2 and of C_1-C_4 gaseous hydrocarbons. The influence of the operation parameters on the minimum detectability has been discussed. Based on these considerations a method of analysis was proposed. The minimum detectable amount of hydrogen, oxygen, nitrogen, carbon monoxide, methane, carbon dioxide, and other gaseous hydrocarbons of the method is 0.02, 0.1, 0.3, 0.4, 0.4, 0.3, 0.2-0.9 μ1 respectively. The volume of sample for the analysis of hydrogen is 10 ml, for O_2, N_2, CO and CH_4, 50 ml, and for CO_2 and gaseous hydrocarbons, 13 ml. The minimum detectable concentrations under these conditions are 2, 2, 6, 8, 8, 20 and 14-74 ppm for H_2, O_2, N_2, CO, CH_4, CO_2 and gaseous hydrocarbons respectively.

本文提出一简便的气相色谱法,用于分析丁二烯中含2-100ppm的气体杂质.采用高灵敏度钨丝热导池作鉴定器,用5埃分子筛作吸附剂而分离H_2,O_2,N_2,CO,CH_4.用丁酮酸乙酯为固定液使CO_2和所有气体烃分离.又讨论用热导池作鉴定器时,影响气相色谱法最小鉴知量的各种因素.这分析方法的最小鉴知量为0.02微升H_2,0.1微升O_2,0.3微升N_2,0.4微升CO,0.4微升CH_4,0.3微升CO_2,0.2-0.9微升气体烃.分析氢时的取样10毫升,分析O_2,N_2,CO,CH_4时50毫升,分析CO_2和气体烃时为13毫升.此时最小鉴知浓度分别为2ppm H_2,2ppm O_2,6ppm N_2,8ppm CO或CH_4,20ppm CO_2和14-74ppm气体烃,

The native technical tetrahydrofuran was tested by G. L. C. to contain micro amounts of hydroxyl-, carbonyl- and unsaturated compounds. Thus it can not be used as monomer for polymerization. In order to determine these impurities, we used the 3.5-dinitrobenzoyl chloride colorimetric method for hydoxyl compound, the 2.4-dini- trophenylhydrazine colorimetric method for carbonyl compounds and coulometric titration method for unsaturated compounds. We found that if the esterification was carried out at a temperature...

The native technical tetrahydrofuran was tested by G. L. C. to contain micro amounts of hydroxyl-, carbonyl- and unsaturated compounds. Thus it can not be used as monomer for polymerization. In order to determine these impurities, we used the 3.5-dinitrobenzoyl chloride colorimetric method for hydoxyl compound, the 2.4-dini- trophenylhydrazine colorimetric method for carbonyl compounds and coulometric titration method for unsaturated compounds. We found that if the esterification was carried out at a temperature of 50+2℃ in the determination of hydoxyl compound, the sensitivity of the method was increased. The colored complex developed with 0.1 ml of 2N or 5% sodium hydroxide was found to be stable within 30 minutes. The methods used by us for the determination of micro amounts of the above mentioned impurities in technical tetrahydrofuran are simple, rapid and accurate.

国产工业四氢呋喃,用气相色谱法证实含有羟基化合物、羰基化合物和不饱和化合物等微量杂质,不能用作高分子单体。为此,对这些杂质分别进行了测定。用3.5-二硝基苯甲酰氯比色法测定羟基化合物,反应在50±2℃条件下进行,提高了灵敏度,在0~60微克/毫升范围内符合比耳定律;以2N或5%氢氧化钠溶液0.1毫升显色为最适宜的条件,有色物在30分钟内是稳定的。羰基化合物的测定采用了2.4-二硝基苯肼比色法,在0-20微克/毫升范围内符合比耳定律。不饱和化合物的测定采用了恒电流库伦滴定法,以0.1N溴化钾-1N盐酸为电解液,由铂阳电极析出新生态溴与不饱和化合物反应,以甲基橙为指示剂,终点由红变黄。这些测定方法均快速、准确,宜于工业四氢呋喃中此三种微量杂质的测定。

 
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