共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
3.
综述饮料中合成着色剂的测定方法,包括高效液相色谱法、分光光度法、薄层色谱法等技术方法,对上述方法进行了比较分析。与其它方法相比,高效液相色谱法灵敏度、精密度、准确度更高,操作简单,适合大批量样品检测,更易推广。由高效液相色谱法衍生出的超高效液相色谱、液相色谱–质谱联用法、绿色高效液相色谱法以及探索快速、高效、稳定、准确、环保的前处理方法是未来技术发展的趋势。 相似文献
4.
本文简要介绍了腌制食品中N-亚硝胺类化合物的种类及特性,重点综述了气相色谱法、气相色谱-质谱法、液相色谱法、液相色谱-质谱法和胶束电动毛细管色谱法等技术在腌制食品中N-亚硝胺类化合物分析中的应用进展(引用文献39篇)。 相似文献
5.
6.
7.
8.
9.
薄层色谱法(TLC)具有简便快速,分离效果好,检出灵敏度高,可以用于制备、定性和定量等特点,因此,近二十年来发展迅速,得到了广泛的应用。但是近几年来,由于高效液相色谱法(HPLC)的快速发展,人们趋向于视薄层色谱法为廉价的和易于采用的、但不能完成困难分离的所谓“二等”技术。但是必须指出,薄层色谱法的这些缺陷并不是方法本身所固有的,而仅仅是由于薄层色谱法一直沿用传统的操作方法,因而使它的分离效能低于高效液相色谱法。随着薄层色谱板和检测方法的改进,以及采用新的操作技术,现在已经出现了高效薄层色谱法(HPTLC),其分离效能完全可以与气相色谱法及高效液相色谱法相比拟。所谓“高效薄层色谱法”实际上就是固定相平均颗粒直径约为5μm的薄层色谱法,其主要特 相似文献
10.
11.
Qualitative and quantitative analysis in quality control of traditional Chinese medicines 总被引:1,自引:0,他引:1
Separation techniques with high efficiency and sensitive detection have been widely used for quality control of traditional Chinese medicines (TCMs). High-performance liquid chromatography, gas chromatography, and capillary electrophoresis are commonly used to separate various components in TCMs. Ultraviolet detection, fluorescence detection, evaporative light-scattering detection, mass spectrometry and nuclear magnetic resonance can be applied to separation techniques for qualitative and quantitative analysis of TCMs. The development of quality control for TCMs based on quantitative and qualitative analysis from 2000 to 2007 are reviewed; the fingerprint technique is also discussed due to its broad application in the quality control of TCMs. Prospects for further research based on our primary results are also discussed. 相似文献
12.
13.
Sterilization by irradiation techniques is considered to be an improved method to treat polluted products of human consumption. Secondary effects, that may be generated in the components of packaging materials, could induce organoleptic damage and some physico-chemical modifications, observed especially in plastic materials. In order to demonstrate any such secondary changes, we have investigated the effects of beta-irradiation (a treatment which could induce either a reticulation or a cleavage in a polymeric sequence) on three polymers; namely, low density polyethylene, polystyrene and polyvinyl chloride. The techniques used to identify irradiation-induced modifications of these polymers were size exclusion chromatography and thermal analysis. Thermal analysis showed a decrease in the percentage of crystallinity of polyethylene after its radiosterilization. Exclusion chromatography highlighted a reticulation for irradiated polyvinyl chloride and polystyrene. 相似文献
14.
15.
Glenn A. Kresge Sylvia Grosse Alexis Zimmer Kaitlin M. Grinias Mauro De Pra Jenny‐Marie T. Wong Frank Steiner James P. Grinias 《Journal of separation science》2020,43(15):2964-2970
Method qualification is a key step in the development of routine analytical monitoring of pharmaceutical products. However, when relying on published monographs that describe longer method times based on older high‐performance liquid chromatography column and instrument technology, this can delay the overall analysis process for generated drug products. In this study, high‐throughput ultrahigh pressure liquid chromatography techniques were implemented to decrease the amount of time needed to complete a 24‐run sequence to identify linearity, recovery, and repeatability for both drug assay and impurity analysis in 16 min. Multiple experimental parameters were tested to identify a range of experimental settings that could be used for the sequence while still maintaining this fast analysis time. The full sequence was replicated on a different system and with different columns, further demonstrating its robustness. 相似文献
16.
介绍了近十年来国内外植物样品中包括药用植物中砷的形态分析研究进展。由于植物中的砷含量甚低,其主要的检测手段是:氢化物电感耦合等离子体原子吸收光谱法(HG-ICP-AAS)、高效液相色谱-等离子体质谱法(HPLC-ICP-MS)、氢化物原子荧光光谱法(HG-AFS)。 相似文献
17.
18.
Joseph Sherma 《液相色谱法及相关技术杂志》2016,39(12):549-557
Advances in the use of thin layer and high-performance thin-layer chromatography for analysis of inks and ink writings in forensic investigations are reviewed. Experimental materials and techniques such as sample preparation, layers, sample application, development, detection, documentation, and interpretation of results are described and selected applications for several ink types are given. Some additional analytical techniques that complement thin-layer chromatography are also mentioned. Citations to important literature, from 2008 to 2016, are included. 相似文献
19.
Alexander S. Kaplitz Mahmoud Elhusseiny Mostafa Samantha A. Calvez James L. Edwards James P. Grinias 《Journal of separation science》2021,44(1):426-437
High‐resolution separation systems are essential for the analysis of complex mixtures in a wide variety of application areas. To increase resolution, multidimensional chromatographic techniques have been one key solution. Supercritical fluid chromatography provides a unique opportunity in these multidimensional separations based on its potential for high solvent compatibility, rapid duty cycles, and orthogonality to other separation modes. This review focuses on two‐dimensional chromatography methods from the past decade that use supercritical fluid chromatography because of these advantages. Valving schemes and modulation strategies used to interface supercritical fluid chromatography with other liquid chromatography and gas chromatography techniques are described. Particular applications of multidimensional separations using supercritical fluid chromatography for the analysis of oils and chiral separations of pharmaceutical compounds are highlighted. Limitations of and a potential trajectory for supercritical fluid chromatography in this field are also discussed. 相似文献