共查询到19条相似文献,搜索用时 78 毫秒
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本文提供了一个简单有效的分析低碳烃氧化转化产物、包括H2、COx(x=1,2)和C1~C9烃的全组成分析方法,实验结果表明,该方法具有操作简单、定量结果准确性高、分析重复性好、以及连续运行周期长等特点,可满足课题基础研究的需要。 相似文献
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毛细管气相色谱法测定液化石油气中C_1~C_5组分的方法研究 总被引:2,自引:0,他引:2
用毛细管气相色谱法测定液化石油气中C1~C5间13种烃类组分,使用Al2O3大口径毛细管柱,用纯组分混合物作标样,方法快速、灵敏,各组分相对标准偏差为0.39%~5.40%,乙烷、乙烯、丁烷及丁烯异构体得到基线分离。 相似文献
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毛细管气相色谱法测定炼厂气中单体烃组分的含量 总被引:1,自引:1,他引:1
采用PLOT/Al2O3石英毛细管气相色谱柱和氢火焰离子化检测器,建立了炼厂气中单体烃组分含量测定的毛细管气相色谱法,当炼厂气中单体烃组分的含量大于或等于2.1%时,RSD≤0.95%,当炼厂气中单体烃组分的含量为0.5%-2.1%时,RSD为0.95%-10.0%,当炼厂气中单体烃组分的含量为0.2%-0.5%时,RSD为10.0%-25.0%,该方法对单体烃组分的测定结果与行业标准SH/T0230-92《液化石油气组成测定法》的测定结果基本一致。 相似文献
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采用美国HP6890炼厂气分析多维填充柱色谱仪,建立了汽油中气体组分含量快速分析方法。采用汽油直接进样,校正归一化法定量,测定汽油中CO2、H2S和各气体烃组分的含量,完成一个样品的分析仅需22min。实验表明,该方法有很好的精密度,各气体组分浓度值的相对标准偏差均小于4.5%。 相似文献
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IntroductionAnalysis of light hydrocarbons achieved by gas-solid chromatography is important in petrochemical industry, environmental protection and some other areas. A variety of columns have been used, including conventional packed column1, Al2O3 and graphitized carbon black PLOT column2, 3 and silica gel SCOT column4. Al2O3 PLOT column is excellent for the analysis of light hydrocarbons. Conventional packed column also has its own advantages, such as easy column preparation, resistanc… 相似文献
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本介绍了一个适于终沸点为400℃或更主的微型反应器液相产物中C1-C5烃全组成分析的专用分析系统和分析方法。系统由六通阀、预柱和分析柱组成,所有组件均置于同一色谱炉内,采用FID检测外标法定量。分析结果相对标准偏差小于10%。半年来的应用结果表明,该系统及方法具有操作简便,定量结果准确,适用范围宽,连续运行周期长等特点,可以用于各类宽镏分样品中C1-C5烃的全组成分析。 相似文献
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吸附/热脱附气相色谱分析痕量C1~C5烃 总被引:3,自引:0,他引:3
本文以活性炭、TDX-01、Tenax GC、Porapak Q和GDX-104为吸附剂,不经冷凝,在常温下吸附富集痕量C1~C5烃并直接引入毛细管柱。同时探讨了吸附剂的最佳热脱附温度、饱和吸附量、吸附富集回收率、热脱附直接进样的线性规律及方法的相对偏差. 相似文献
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《Analytical letters》2012,45(16):1417-1429
Abstract A glass capillary gas chromatographic system using simultaneous flame ionization (FID) and electron capture (ECD) detection has been employed for the analysis of trace volatile organic pollutants in a municipal drinking water supply. The use of dual detectors with glass capillary columns allows resolution and detection of both halogenated and non-halogenated compounds simultaneously at less than microgram per liter (ppb) concentrations. By using diethyl ether as a solvent in preparing standard solutions of volatile organic compounds, standardization is made more accurate due to a reduction in solvent masking of early eluting peaks of interest. Additionally, ether shows promise for use in an internal standard method for quantification of VOA. These techniques were found to alleviate problems previously encountered in the analysis of purgeable organics and are described. 相似文献
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《Analytical letters》2012,45(11):1179-1188
Abstract An isomeric pair of compounds is obtained from 4-car-boxyaldehydephenanthrene-5-carboxylic acid (1) by various methods routinely applied for the methylation of acidic oxygenation products of K-region polycyclic aromatic hydrocarbons (PAH's) prior to GC and GC/MS analysis. Differentiation of the individual cyclic and acyclic isomers, a classical general problem, proves possible by careful analysis of the mass spectral fragmentation patterns in the representative case studied here. 相似文献
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YE Chang-wen ZHANG Xue-na HUANG Jiang-yan LI Xiu-juan PAN Si-yi College of Food Science & Technology Huazhong Agricultural University Wuhan P. R. China 《高等学校化学研究》2011,(2):198-202
Headspace solid-phase microextraction(HS-SPME) with sol-gel calix[6]arene-containing fiber followed by gas chromatography with a flame ionization detector was used to examine the composition and distribution of seven polycyclic aromatic hydrocarbons(PAHs) in water. The novel SPME fiber exhibited higher extraction efficiency to PAHs compared with poly(dimethylsiloxane) and other calixarene-containing fibers. Extraction/retention mechanism based on the interactions between calixarenes and PAHs was discussed. ... 相似文献
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A new type of packed glass capillary column (PGCC) with a core, and its potential usage in practice are described. The permeability of the column is considerably greater than that of conventional PGCC and its N/(Pi-Po) value is also higher. This novel PGCC column has been successfully applied to the analysis of trace levels of ethyne, cyclopropane, propadiene, propyne, and other C1? C4 impurities in pure ethene, propene, 1,3-butadiene, and catalytic cracking gas samples as well as other petrochemical gases such as liquified petroleum gas. 相似文献