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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
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用反相高效液相色谱法纯化白细胞介素-2条件初探胡明(沈阳军区军事医学研究所沈阳110031)关键词反相高效液相色谱法,白细胞介素-21前言高效液相色谱法(HPLC)是一项分辨率很高的液相色谱技术,具有速度快,灵敏度高、样品可回收等优点。除被广泛地应用... 相似文献
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Evaluation and optimization of the metal‐binding properties of a complex ligand for immobilized metal affinity chromatography
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Bin Chen Rong Li Shiyu Li Xiaoli Chen Kaidi Yang Guoliang Chen Xiaoxun Ma 《Journal of separation science》2016,39(3):518-524
The simultaneous determination of two binding parameters for metal ions on an immobilized metal affinity chromatography column was performed by frontal chromatography. In this study, the binding parameters of Cu2+ to l ‐glutamic acid were measured, the metal ion‐binding characteristics of the complex ligand were evaluated. The linear correlation coefficients were all greater than 99%, and the relative standard deviations of two binding parameters were 0.58 and 0.059%, respectively. The experiments proved that the frontal chromatography method was accurate, reproducible, and could be used to determine the metal‐binding parameters of the affinity column. The effects of buffer pH, type, and concentration on binding parameters were explored by uniform design experiment. Regression, matching and residual analyses of the models were performed. Meanwhile, the optimum‐binding conditions of Cu2+ on the l ‐glutamic acid‐silica column were obtained. Under these binding conditions, observations and regression values of two parameters were similar, and the observation values were the best. The results demonstrated that high intensity metal affinity column could be effectively prepared by measuring and evaluating binding parameters using frontal chromatography combined with a uniform design experiment. The present work provided a new mode for evaluating and preparing immobilized metal affinity column with good metal‐binding behaviors. 相似文献
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离子色谱法分析金属离子的研究进展 总被引:3,自引:0,他引:3
综述了离子色谱法(IC)分析金属离子的研究进展,对目前应用于分析金属离子的阳离子交换IC、阴离子交换IC和螯合离子色谱进行了评述。阳离子交换IC是IC分析金属离子的主要形式,固定相为强酸(磺酸)型阳离子交换剂和弱酸(羧酸)型阳离子交换剂,结合适当的检测方法,阳离子交换IC可以测定碱金属、碱土金属、过渡金属、稀土离子、铵离子及低相对分子质量的有机胺类分子等。阴离子交换IC可以分析碱土金属、过渡金属、稀土离子等,对金属离子的分析具有更好的选择性,并可以实现金属离子和无机阴离子的同时测定。螯合离子色谱可以对复杂基体中的痕量金属离子进行测定。引用文献125篇。 相似文献
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朱岩 《广东微量元素科学》1996,3(8):1-8
螯合物离子色谱是一种利用螯合物进行不同方式分离和检测的离子色谱模式,目前已经被痕量金属分析广泛采用,本文对一些螯合物阳离子交换色谱、螯合物色谱、阴离子交换色谱和离子对色谱最新进展进行了综述,并采用基本螯合物化学理论(金属螯合物稳定性、金属原子有效电荷、螯合剂能力等)对保留和分离机理进行了讨论。 相似文献
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《Journal of separation science》2017,40(18):3696-3702
Immobilized metal affinity chromatography has drawn great attention as a widespread separation and purification approach. In this work, ruthenium was firstly introduced into the preparation of immobilized metal affinity chromatography considering its affinity to N,O‐donor ligands. A β‐cyclodextrin‐functionalized poly(glycidyl methacrylate‐ethylene dimethacrylate) monolith was designed and employed as the supporting material in immobilized metal affinity chromatography. Thiosemicarbazide was introduced into the synthesis process, which not only acted as a bridge between β‐cyclodextrin and glycidyl methacrylate, but also chelated with ruthenium because of its mixed hard‐soft donor characteristics. The developed monolithic ruthenium(III)‐immobilized metal affinity chromatography column was utilized for the adsorption and separation of hippuric acid, a biological indicator of toluene exposure. To achieve high extraction capacity, the parameters affecting the extraction efficiency were investigated with an orthogonal experiment design, L9 (34). Under the optimized conditions, the enrichment factor of hippuric acid was 16.7‐fold. The method reproducibility was investigated in terms of intra‐ and interday precisions with relative standard deviations lower than 8.7 and 9.5%, respectively. In addition, ruthenium(III)‐immobilized metal affinity chromatography material could be used for up to 80 extractions without an apparent change in extraction recovery. 相似文献
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A novel metal aquo‐ion affinity chromatography has been developed for the analysis of basic compounds using heat‐treated silica gel containing hydrated metal cations (metal aquo‐ions) as the packing material. The packing materials of the metal aquo‐ion affinity chromatography were prepared by the immobilization of a single metal component such as Fe(III), Al(III), Ag(I), and Ni(II) on silica gel followed by extensive heat treatment. The immobilized metals form aquo‐ions to present cation‐exchange ability for basic analytes and the cation‐exchange ability for basic analytes depends on pKa of the immobilized metal species. In the present study, to evaluate the retention characteristics of metal aquo‐ion affinity chromatography, the on‐line solid‐phase extraction of drugs was investigated. Obtained data clearly evidence the selective retention capability of metal aquo‐ion affinity chromatography for basic analytes with sufficient capacity. 相似文献
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Rong Li Yan Wang Guo‐Liang Chen Mei‐Shi Xiao‐Gang Wang Jian‐Bin Zheng Bin Chen 《中国化学会会志》2011,58(2):215-221
The chromatographic behaviors of proteins on iminodiacetic acid (IDA) column with and without immobilized metal ion were examined in detail. Comparing the effects of pI, solution pH, and salt concentration on retention of proteins in cation‐exchange chromatography (CEC) and metal chelate affinity chromatography (MCAC), the retention mechanism of proteins was investigated in MCAC. By aid of observing the retention characteristics of proteins on naked IDA and metal chelate columns in high concentration salt‐out salt solution, the hydrophobic interaction in MCAC and the influence of metal ion on it were proved. In terms of the comparison of the thermodynamics of proteins in CEC and MCAC, the thermostability, the conformational change entropy Δ(ΔS0) and enthalpy Δ(ΔH0), compensation temperature β, the driving force and caloritic effect of proteins in MCAC were discussed. The identity of retention mechanism at protein thermal denaturation in CEC and MCAC was demonstrated by using the compensation relationship between ΔH0 and ΔS0. 相似文献
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金属络合物作气相色谱固定相的进展 总被引:5,自引:0,他引:5
评述了近年来金属络物作气相色谱固定相的研究进展。介绍了金属络合物作氯相色谱固定相的原理、特点,并对用作气相色谱固定相的金属络合物进行了分类,展望了金属络合物用作气相色谱固定相色谱固定相的前景。 相似文献
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This work describes the construction and operation of a flame ionization detector for the selective detection of metal-containing compounds after capillary supercritical fluid chromatography. Using optimal conditions for achieving metal sensitive flame ionization responses which have been established for the detector after capillary gas chromatography, initial evaluation of the detector after SFC proved promising. Like the carbon sensitive FID, it appears that the metal sensitive FID is compatible with SFC when pure carbon dioxide is used as the mobile phase. Response characteristics were found to be similar to those observed when the detector is used in gas chromatography. 相似文献
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This review is devoted to the application of metal complexes as column packings and liquid stationary phases in gas chromatography. Particular attention is paid to the stationary phases with nitrogen-containing functional groups (e.g., amine and ketoimine) and β-diketonates on the modified silica surface. The review also concerns the results of the research on metallomesogenes and chiral stationary phases. The factors influencing the retention mechanism in complexation gas chromatography are discussed. Practical application of the metal chelate-containing chromatographic packings for analytical separation of organic substances is considered. 相似文献