共查询到19条相似文献,搜索用时 78 毫秒
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综述了白酒年份检测鉴定技术,包括气相色谱法、气相色谱-质谱法、荧光光谱法以及稳定同位素质谱法等技术,并对上述几类方法进行了比较。以气相色谱为基础的分析技术,通过对白酒酒基中的挥发物成分进行分析并构建指纹图谱和预测模型,与实际样品谱图进行匹配进行年份测定;以稳定同位素为基础的分析技术,通过对存储过程中白酒酒基中放射性同位素14C等成分衰减程度来进行年份测定;以光谱为基础的分析技术,通过预测模型的构建和实际样品的匹配进行年份测定;电子鼻、电子舌检测技术更依赖于鉴定人员对于分析方法的熟练使用,以科学分析方法进行数据分析。最后对白酒年份检测鉴定技术的发展进行了展望。 相似文献
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从80年代初交联毛细管柱和大内径厚液膜毛细管柱的问世,显示了毛细管色谱法的突出优点,从而以毛细管柱逐步取代填充柱成为必然趋势。气相色谱法从1959年开始用于火炸药分析,从80年代初起把毛细管气相色谱用于火炸药污染物的分析以来,气相色谱法已成为火炸药分析十分有用的工具。根据我们多年的研究认为毛细管气相色谱法在很多情况下优于填充柱气相色谱法。 相似文献
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用毛细管气相色谱法FID检测器,外标法定量对丝氨醇及其酯化产物的纯度进行了分析。用乙酸酐和吡啶对其进行衍生化,酯化率大于99.6%,生成的酯化产物用毛细管色谱法分析,RSD为0.85%。 相似文献
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介绍了常见签字笔的分类,并综述了近十年中签字笔油墨成分检测方法的研究进展,包括光谱法(拉曼光谱法、红外光谱法、显微分光光度法、紫外-可见导数光谱法),色谱法(薄层色谱法、气相色谱-质谱法、高效液相色谱法、高效毛细管电泳法、裂解气相色谱法)和综合分析法等(引用文献19篇)。 相似文献
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Takao TSUDA 《色谱》2000,18(5):402-411
Abstract:Capillary columns are used in both capillary liquid chromatography and capillary electrochromatography. The design for capillary liquid chromatography is discussed in comparison with capillary gas chromatography. The difference of diffusion coefficient in gas and liquid phase is a key role. The study for obtaining a high performance capillary liquid chromatography is discussed. Capillary electrochromatography is recently interesting for its instinct ability to realize a high performance chromatography. Capillary electrochromatography with and without pressurized flow is reviewed briefly. Instrumentation for capillary electrochromatography with pressurized flow is discussed. The port of splitting, and gradient elution of both solution and potential are described. The new findings of both the variation of column resistance and capacity factor according to the value of applied electric voltage are also discussed. 相似文献
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A. A. Korolev T. P. Popova V. E. Shiryaeva A. A. Kurganov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2006,80(1):120-123
The permeability of monolithic silica gel capillary columns with respect to the helium carrier gas was studied using gas chromatography. The results obtained by gas chromatography and liquid chromatography were found to be in close agreement. The permeability of monolithic capillary columns was compared to that of hollow capillary columns and columns packed with finely dispersed sorbents. It was demonstrated that the permeability of the monolithic capillary columns studied is almost three orders of magnitude lower than that of hollow capillary columns of the same diameter but two orders of magnitude higher than that of columns packed with micron-scale particles. The interstitial fraction of the monolithic columns was found to be very high, 0.95. 相似文献
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F. A. Maris E. Noroozian R. R. Otten R. C. J. M. van Dijck G. J. de Jong U. A. Th. Brinkman 《Journal of separation science》1988,11(2):197-202
Narrow-bore column liquid chromatography coupled on-line with capillary gas chromatography (LC/GC) is used for the determination of polychlorinated biphenyls (PCBs) in sediment via a heart-cutting technique. This method is compared with a method in which two off-line column clean-up steps are used with subsequent analysis by capillary gas chromatography. For the LC/GC analysis the recovery of PCBs was 90–100%. For two sediment samples from the river Meuse the LC/GC and the other, more laborious method showed good agreement. 相似文献
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快速气相色谱法分析石油饱和烃 总被引:6,自引:0,他引:6
提出了一种快速分析原油和岩石抽提物中饱和烃组分的毛细管气相色谱(GC)方法。由于在该方法中采用了细内径毛细管柱,故饱和烃的GC分析周期由原来的80~90 min缩短至15 min,分析速度加快约5倍,大大提高了工作效率和仪器通量,使石油饱和烃得到了很好的分离分析。该方法符合中华人民共和国石油天然气行业标准SY/T5120-1997的要求。20万理论塔板数的细径柱的应用,可供石油中异构烷烃,尤其是甾烷、萜烷类的气相色谱/质谱(GC/MS)快速分析方法及芳烃的GC快速分析方法借鉴。 相似文献
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Chemical modification of target analytes is widely used in modern analytical methods. This review focuses on the application of chemical modification techniques is the simultaneous analysis of metallic species by capillary electrophoresis, liquid chromatography and gas chromatography. Emphasis is placed on the procedures relating to analyses carried out by capillary electrophoresis. The development of this topic in the past five years is evaluated for liquid chromatography and gas chromatography. The advantages, performance and application in real samples are compared for the three techniques. 相似文献
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The wide variety of volatile organic compounds found in the indoor environment can present a difficult chromatographic problem for the analyst. Capillary-column gas chromatography is required to achieve adequate separation. Thermal desorption/capillary gas chromatography/mass spectrometry is usually the preferred method for broad spectrum analysis of the volatile organics detected indoors. Cryogenic trapping is required for capillary gas chromatographic analysis of the more volatile components. 相似文献
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About a hundred hydrocarbon compounds have been identified as components of petroleum jet fuel by capillary gas chromatography and high-performance liquid chromatography. In gas chromatography stuides, glass capillary columns over 100 m long with polysiloxane OV-101 have been used as the stationary phase. In liquid chromatography, 150-mm-long columns with a separation ability of about 60 000 theoretical plates meter of length have been used to separate partitioned fractions of aromatic hydrocarbons from petroleum jet fuels of various origins. 相似文献