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冷柱头
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  cold on-column
     A Convenient Cold On-column Injection Method for Capillary Gas Chromatography
     简易毛细管气相色谱冷柱头进样法
短句来源
     Study of Organosulfur Compounds in Fresh Garlic by Gas Chromatography/Mass Spectrometry Incorporated with Temperature-Programmable Cold On-Column Injection
     冷柱头程序升温进样-气相色谱/质谱法研究新鲜大蒜中的有机硫化合物
短句来源
     A simple and convenient cold on-column injection method was introduced for capillary gas chromatograph with no special injector.
     介绍了一种在无冷柱头进样器和特殊注射器情况下简便可行的冷柱头进样技术。
短句来源
     For the analysis of organosulfur compounds in fresh garlic,a gas chromatographic/mass spectrometric(GC/MS) method is proposed using temperature-programmable cold on-column injection and cold solvent extraction of the fresh garlic.
     采用冷溶剂提取新鲜大蒜中的有机硫化合物,结合冷柱头程序升温进样,对大蒜原始组分进行了气相色谱/质谱分析。
短句来源
  “冷柱头”译为未确定词的双语例句
     A method has been developed to measure the carbon distribution and content of microcrystal wax with high drop melting point.
     采用冷柱头进样的高温气相色谱技术,建立了测定高滴熔点微晶蜡中正构和非正构烃类含量及碳数分布的方法。
短句来源
  相似匹配句对
     A Convenient Cold On-column Injection Method for Capillary Gas Chromatography
     简易毛细管气相色谱柱头进样法
短句来源
     On cold fusion
     核聚变
短句来源
     Cold Mountain
    
短句来源
     4、 Stigma exserted rate. .
     4、柱头外露率。
短句来源
     Study of Organosulfur Compounds in Fresh Garlic by Gas Chromatography/Mass Spectrometry Incorporated with Temperature-Programmable Cold On-Column Injection
     柱头程序升温进样-气相色谱/质谱法研究新鲜大蒜中的有机硫化合物
短句来源
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  cold on-column
Alternatively, the accuracy and sensitivity of the direct analysis of organotin chlorides (Y=Cl) by cold on-column injection CGC-ECD or by thermospray LC-MS were determined.
      
A cold on-column injection was applied to avoid irregular discrimination of the various acids due to sample splitting and an automatic injection technique was used to accommodate the large number of samples generated from biological origin.
      
Separation of the volatiles was achieved on an AI 93 GC equipped with a cold on-column injector and an FID.
      


A simple and convenient cold on-column injection method was introduced for capillary gas chromatograph with no special injector.Its deviations in quantitative and qualitative analysis were validated by using heroin as testing samples. The results showed that its precision in quantitative analysis,repeatability of its retention time and the column efficiency were good enough for practieal analysis.

介绍了一种在无冷柱头进样器和特殊注射器情况下简便可行的冷柱头进样技术。以海洛因、秋水仙碱、正三十烷醇为研究对象,考察了本方法的定性、定量偏差,提出两种溶质聚焦方法。

he thermo-labile organophosphorous pesticide Phoxim was determined by capillary gas chromatographywith flame phototnetric detector. When high linear velocity H_2(>200cm/s) was used as carrier gas,the thermo-decomposition of Phoxim was considerably reduced.The most important gas chromatography conditions,injectortempereture and column head pressure,were studied.The thermo-decomposition preducts were identified by gaschromatography-mass spectrometry.Under higher column head pressure,the sample size can be increased...

he thermo-labile organophosphorous pesticide Phoxim was determined by capillary gas chromatographywith flame phototnetric detector. When high linear velocity H_2(>200cm/s) was used as carrier gas,the thermo-decomposition of Phoxim was considerably reduced.The most important gas chromatography conditions,injectortempereture and column head pressure,were studied.The thermo-decomposition preducts were identified by gaschromatography-mass spectrometry.Under higher column head pressure,the sample size can be increased to 4μLby still keeping the response within linear range.

毛细管气相色谱法测定热不稳定有机磷农药辛硫磷顾明松,罗毅(军事医学科学院毒物药物研究所北京100850)1前言热不稳定化合物的气相色谱分析是色谱工作者一直在设法解决的难题,已有冷柱头(ccolon-col-umn)和电子压力程序控制进样(EPC)等方...

An automated Air Sample Concentrator/Gas Chromatograph/Mass Spectrometer(ASC/GC/MS)is described for the urban and field atmosphere monitoring of trace organic gases,included hydrocarbons(HCs),hydrofluorocarbons(HFCs) and hydrochlorofluorocarbons(HCFCs).Detection limits 20pptv are achieved by concentration of 500 ̄100 cm3 air sample onto a two-stage cryotrap.The enriched air sample is thermally desorbed by direct ohmic heating of the glasss beadfilled microtrap and quickly transported to the head of GC colmn cryofocussing...

An automated Air Sample Concentrator/Gas Chromatograph/Mass Spectrometer(ASC/GC/MS)is described for the urban and field atmosphere monitoring of trace organic gases,included hydrocarbons(HCs),hydrofluorocarbons(HFCs) and hydrochlorofluorocarbons(HCFCs).Detection limits 20pptv are achieved by concentration of 500 ̄100 cm3 air sample onto a two-stage cryotrap.The enriched air sample is thermally desorbed by direct ohmic heating of the glasss beadfilled microtrap and quickly transported to the head of GC colmn cryofocussing there.The cooled column head is heated in a high speed of 50℃/s and the air sample is"injected" to the column.Individual organic compounds are determined by selected ion masses for quantitation.The all system is designed to operate automatically at an atmospheric monitor or research centres providing about 1.5 hour kreplicate calibration analyses.

本文介绍用一套自制的大气浓缩装置结合色谱/质谱,自动采样和分析城市污染大气及远离城市的自然本底大气中痕量有机物的过程。分析的目标化合物主要是烃类化合物(HCS)和氯氟烃类化合物(HCFCs)。用二级浓缩进样系统浓缩500~1000cm3空气样品,检测限可达20PPtv(10-12摩尔比)。在玻璃微球填充的微型柱中浓缩的样品经加热被吹扫转移到色谱柱柱头,然后冷柱头以50℃/s的加热速度使浓集在其中的空气样品迅速汽化被“注射”到色谱柱中。用质谱检测每个被分离的有机化合物并用计算选择的特征离子峰面积法对其进行定量分析。

 
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