分离蛋白质的高效离子交换色谱填料的研究（Ⅱ）：新型弱阳…

将硅胶与环氧基有机硅烷反应的产物与聚乙烯亚胺交联，再与环状酸酐反应制得高效弱阳离子交换色谱填料ＷＣＸ－５和ＷＣＸ－６；交联产物与聚琥珀酰亚胺反应，然后碱性水解制得填料ＷＣＸ－７，研究了它们的性能，ＷＣＸ－５的分离性能优于ＷＣＸ－５，ＷＣＸ－７有一些不同于前两者的色谱特性，三者皆可用于蛋白质的分离，溶菌酶的活性回收率大于９４％。     

高效液相色谱法测定柴油族组成

在银型磺酸键合硅胶柱上以含苯或环己烯的正己烷为流动相,实现了饱和烃、烯烃的基线分离,以改进的迁移丝式氢火焰离子化检测器（ＭＷ－ＦＩＤ）进行定量检测,同时考察了Ａｇ－ＳＣＸ柱的使用性能及改进的ＭＷ－ＦＩＤ的定量准确性。在此基础上建立了高效液相色谱体系分离柴油族组成（饱和烃、烯烃、芳烃及胶质）。     

多阴离子的有机金属化学研究Ⅱ——α-Keggin阴离子的三芳基锡超分子层柱配合物的合成、表征及反应机理

用α－Ｋｅｇｇｉｎ杂多阴离子ＸＷ１２Ｏｎ－４０与三芳基氢氧化锡Ａｒ３ＳｎＯＨ反应，合成了四个三芳基锡杂多配合物｛［Ａｒ３Ｓｎ（ＣＨ３ＣＨ２ＯＨ）］＋ｎ［ＸＷ１２Ｏ４０］ｎ－｝·ｘＨ２Ｏ，通过元素分析、红外、核磁共振、Ｘ射线粉末衍射等手段对其进行了表征，提出了该类三维层柱超分子配合物的结构模型，并探讨了反应机理．     

W-MCM-48中孔分子筛的微波合成与表征

在微波辐射下快速合成出Ｗ－ＭＣＭ－４８分子筛,通过ＸＲＤ,ＦＴ－ＩＲ和Ｎ２吸附等手段对样品进行了表征,并考察了合成条件对Ｗ－ＭＣＭ－４８相对结晶度的影响。结果表明：在微波辐射下快速合成出的Ｗ－ＭＣＭ－４８分子筛结晶及热稳定性良好,且孔道规整;Ｗ离子进入了分子筛的骨架;以十六烷基三甲基溴化铵为模板剂,最佳合成条件为ｎ（Ｎａ２Ｏ）／ｎ（ＳｉＯ２）＝０．２５,ｐ＝０．４８ＭＰａ,ｔ＝２ｈ。苯乙烯催化氧化     

新型层柱材料ZnAl－XW_（11）Co的合成、表征及催化活性

新型层柱材料ＺｎＡｌ－ＸＷ_（１１）Ｃｏ的合成、表征及催化活性胡长文，刘彦勇，王作屏，张继余，王恩波（东北师范大学化学系，长春１３００２４）关键词层柱化合物，杂多阴离子，Ｋｅｇｇｉｎ结构，乙酸，正了醇，酯化化学组成通式为的阴离子粘土具有独特的层柱结构?..     

I_h对称性约化在SW－X_α方法中的实现与C_（60）的计算

Ｉ_ｈ对称性约化在ＳＷ－Ｘ_α方法中的实现与Ｃ_（６０）的计算于微舟，张明瑜，李晓天（吉林大学理论化学研究所，理论化学计算国家重点实验室，长春，１３００２３）关键词ＳＷ－Ｘ_α方法，对称性约化，电离能，ＵＶ光谱在合成出Ｃ（６０）并发现它具有超导性质后，围...     

用气相色谱、气相色谱－质谱对萘普生重要中间体6－甲氧基－2－乙酰萘合成反应的研究

在优良抗风湿药物萘普生的重要中间体６－甲氧基－２－乙酰素的合成中存在溶剂硝基苯的毒性及所带来的污染。而改用二氯乙烷作溶剂，只加少量硝基苯即可。为配合合成工艺的优化，用气相色谱（ＧＣ）、气相色谱－质谱（ＧＣ／ＭＳ）对反应产物、副产物及多个杂质进行了定性分析研究，并在５％ＯＶ－１０１ＣｈｒｏｍｏｓｏｒｂＷＡＷＤＭＣＳ柱上完成了产物的内标定量分析。从而减少了副反应和高沸点杂质的生成，最终生产出了９５％以上含量的６－甲氧基－２－乙酰萘产品，收率达到６０％。     

草酸二乙酯催化加氢制乙二醇液相产物分析

介绍了一种草酸二乙酯催化加氢制乙二醇液相产物的气相色谱分析法,色谱分析在ＧＣ－１０３型色谱仪上进行,用ＣＤＭＣ－１ＣＸ型色谱数据处理机计算,液相产物在内填５％ＦＦＡＰ／６０～８０目硅藻土８８０（ＡＷＤＭＣＳ）的不锈钢色谱柱上分离,用热导检测器检测,以２０ｍＬ／ｍｉｎ流速的氢气为载气,每个样品的分析时间约为１０ｍｉｎ。方法快速简便,数据较为精密准确。     

用气相色谱、气相色谱－质谱对萘普生重要中间体6－甲氧基－2－乙酰萘合成反应的研究

 在优良抗风湿药物萘普生的重要中间体６－甲氧基－２－乙酰素的合成中存在溶剂硝基苯的毒性及所带来的污染。而改用二氯乙烷作溶剂，只加少量硝基苯即可。为配合合成工艺的优化，用气相色谱（ＧＣ）、气相色谱－质谱（ＧＣ／ＭＳ）对反应产物、副产物及多个杂质进行了定性分析研究，并在５％ＯＶ－１０１ＣｈｒｏｍｏｓｏｒｂＷＡＷＤＭＣＳ柱上完成了产物的内标定量分析。从而减少了副反应和高沸点杂质的生成，最终生产出了９５％以上含量的６－甲氧基－２－乙酰萘产品，收率达到６０％。     

对映体的气相色谱分析Ⅱ．手性芳香二级醇的分离测定

在手性毛细管柱Ｃｈｉｒａｓｉｌ－Ｌ－Ｖａｌ（玻璃柱）、ＣＹＤＥＸ－β－全甲基化β－环糊精（交联弹性石英柱）上考察了苯乙醇腈、１－苯基－１－乙醇、１－苯基－１－丙醇、１－苯基－２,２－二甲基－１－丙醇、１－（４－氯苯基）－１－乙醇芳香二级醇对映体分离的色谱行为。并测定了一系列不对称合成实际样品中对映体过量值（即ｅ．ｅ．值）。     

蛋白质在合成阳离子交换剂上的色谱特性研究

用国产材料按间接法合成了螯合型弱阳离子交换剂,详细研究了合成填料的色谱性能,并与商品柱的分离效能进行了比较;在宽温度范围内研究了蛋白质在弱阳离子交换系统中的色谱热力学,测定了蛋白质在色谱过程变性时的热力学参数 (△H0和△S0) 和补偿温度β,提出用标准熵变△S0判断蛋白质的构象变化和用△H0与△S0的补偿关系鉴定蛋白质各变体在色谱系统保留机理的同一性。考察了螯合型弱阳离子交换剂与金属离子的作用,研究了蛋白质在金属螯合色谱中的保留机理。     

Chromatographic behaviors of proteins on cation-exchange column

A weak cation-exchanger (XIDACE-WCX) has been synthesized by the indirect method. The chromatographic characteristics of the synthesized packing was studied in detail. The standard protein mixture and lysozyme from egg white were separated with the prepared chromatographic column. The chromatographic thermodynamics of proteins was studied in a wide temperature range. Thermodynamic parameters standard enthalpy change (deltaH0) and standard entropy change (deltaS0) and compensation temperature (beta) at protein denaturation were determined in the chromatographic system. By using obtained deltaS0, the conformational change of proteins was judged in the chromatographic process.The linear relationship between deltaH0 and deltaS0 can be used to identify the identity of the protein retention mechanism in the weak cation-exchange chromatography. The interaction between weak cation-exchanger and metal ions was investigated. Several metal chelate columns were prepared. The effects of introducing metal ion into the naked column on protein retention and the retention mechanism of proteins in the metal chalet affinity chromatography were discussed.     

连续棒状疏水色谱柱的合成及表征

以单体,致孔剂在不锈钢柱管中直接聚合的方法,合成了一种丙烯酰胺－甲基丙烯酸丁酯－Ｎ,Ｎ‘－亚甲基双丙烯酰胺聚合物连续棒状疏水色谱柱。考察了聚合物单体中甲基丙酸丁酯的含量对于标准蛋白质的分离效果和介质疏水性的影响。     

钳蝎毒中抗癫痫肽、镇痛肽和抗肿瘤肽的快速同时分离和鉴定

采用Shim-Pack WCX-1型阳离子交换高压色谱柱对中国东亚钳蝎全蝎毒进行了分离，在鉴定了其中的抗癫痫肽、镇痛肽和抗肿瘤肽活性峰的基础上，应用Shim-Pack DIOL-300型凝胶排阻高压色谱柱对它们进行了进一步分离和鉴定，可以得到较纯的3种多肽。在高压色谱所提供的全蝎毒分离信息的基础上，应用与Shim-Pack WCX-1色谱柱具有相同交换基团的、具有较大吸附容量的CM Sepharose CL-6B软胶介质在低压色谱上对全蝎毒进行了分离，并分别对其中的抗癫痫肽、镇痛肽和抗肿瘤肽进行了鉴定。     

疏水作用色谱介质的合成及色谱特性研究

利用国产大孔硅胶作基质合成了疏水填料。按照高效疏水作用色谱法,采用梯度洗脱方式分离了6种标准蛋白及唾液中α-淀粉酶和基因工程生产的γ-干扰素。柱子不可逆吸附小、被试验的α-淀粉酶和溶菌酶活性几乎定量被回收。应用合成的色谱填料研究了洗脱剂中盐浓度和温度对蛋白质保留行为的影响,论证了合成填料的色谱属性。     

厚朴酚键合硅胶液相色谱固定相的制备、表征与性能评价

通过γ-巯丙基三甲氧基硅烷(KH-590)的作用, 将具有抗菌功能的中草药厚朴的主要药用成分厚朴酚键合在硅胶表面上, 制备了厚朴酚键合硅胶液相色谱固定相. 采用红外光谱、元素分析和热重分析对该固定相进行了表征. 以苯同系物、5种吡啶、6种苯胺和8种芳香羧酸类化合物为溶质探针, 初步考察了该新型固定相的基本色谱性能, 研究了其对这些化合物的保留机理. 结果表明, 该固定相的反相色谱性能类似于十八烷基键合硅胶固定相(ODS), 分离原理与疏水性作用有关; 另外, 该固定相包含有别于疏水性作用的氢键作用、π-π电荷转移作用和偶极-偶极等作用, 多种作用力使其在分离某些可电离的碱性和酸性化合物时表现出更好的选择性和分离效果. 厚朴酚配体的多种作用位点对快速分离极性芳香化合物有重要贡献.     

Hydroxyl Functionalized Uniform‐Porous Beads,Synthesis and Chromatographic Use

Uniform‐porous poly(dihydroxypropyl methacrylate‐co‐ethylene dimethacrylate), poly(DHPM‐co‐EDM) particles were synthesized as an alternative packing material for reversed phase chromatography. In the synthesis, poly(glycidyl methacrylate‐ethylene dimethacrylate), poly(GMA‐co‐EDM) particles were obtained by a multi‐stage swelling and polymerization protocol, the so called “modified seeded polymerization”. For this purpose, 2.4 µm polystyrene seed particles were first swollen by dibutyl phthalate (DBP) and then by a monomer mixture including glycidyl methacrylate and ethylene dimethacrylate. The repolymerization of monomer phase in the swollen seed particles provided porous uniform particles approximately 7 µm in size. Poly(DHPM‐co‐EDM) particles were obtained by the acid hydrolysis of the particles synthesized with different GMA feed concentrations. These particles were used as column‐packing material in the reversed phase separation of alkylbenzenes. The retention factor‐acetonitrile concentration diagrams clearly showed that the polarity of packing material could be controlled by changing the GMA feed concentration in the “modified seeded polymerization”. The packing materials with more hydrophobic character (i.e., poly(EDM) and poly(DHPM‐co‐EDM) particles produced with the GMA feed concentrations up to 20%) exhibited better chromatographic performance in the reversed phase mode.     

Preparation of strong anion-exchange chromatographic packings based on monodisperse polymeric beads and their application in the separation of biopolymers

A new hydrophilic strong anion-exchange (SAX) stationary phase for HPLC has been synthesized by chemical modification of macroporous 8.0-m monodisperse poly(glycidylmethacrylate-co-ethylenedimethacrylate) beads (P_GMA/EDMA). The stationary phase was evaluated in detail to determine its ion-exchange properties, separability, reproducibility, hydrophilicity, and the effect of column loading and pH on the separation and retention of proteins. It was found to have an ion-exchange chromatographic (IEC) retention mechanism. The highest dynamic protein loading capacity of the synthesized SAX packing for BSA was 22.6 mg g^–1. Five proteins were separated within 6.0 min using the synthesized SAX resin. The SAX resin was also used for rapid separation and purification of recombinant human stem cell factor (rhSCF) from a crude extract solution in only one step. The purity of the purified of rhSCF was >92.4%.     

Performance of 2-amino tetraphenyl porphyrin stationary phase in RP-HPLC of amino acids in presence and absence of Zn2+

Summary In an attempt to provide a more convenient approach towards better resolution of amino-acids (AAs) by RP-HPLC, a novel chromatographic packing was prepared by dynamically coating 2-amino tetraphenyl porphyrin (atpp) onto a C18 reversed-phase packing. Its performance was examined in order to arrive at the optimum operating conditions. Towards this end, the retention characteristics of 20 AAs that form the building blocks of proteins were investigated on both the C18 and the atpp coated C18 columns at different pHs in presence and absence of Zn(II). The effects of eluent composition, pH and Zn(II) concentration were examined in each case. The results obtained show that the atpp coated C18 column in the presence of Zn(II) ion shows retention times andk values that are effectively different from those of the C18 column and displays remarkable resolution for all of AAs, particularly the polar and charged polar ones 12 out of 20 common AAs can be readily resolved under isocratic conditions.     

无孔单分散亲水性中强阳离子交换树脂的制备及其在蛋白质快速分离中的应用研究

以3.0μm无孔单分散亲水性交联聚甲基丙烯酸环氧丙酯树脂为基质,将其表面经新的化学方法改性后制备了一种新型的无孔中强阳离子交换色谱填料。详细考察了该无孔填料对标准蛋白分离性能,有机溶剂、pH、流动相盐种类和流速等对蛋白质保留的影响。实验结果表明,在流速为4 mL/min时,线性梯度时间在2.0 min内可快速分离4种标准蛋白,蛋白质的保留符合阳离子交换色谱规律。将其应用于快速纯化鸡蛋清中的溶菌酶,取得较好效果。