CN1603817A - Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof - Google Patents

Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof Download PDF

Info

Publication number
CN1603817A
CN1603817A CN 200410068142 CN200410068142A CN1603817A CN 1603817 A CN1603817 A CN 1603817A CN 200410068142 CN200410068142 CN 200410068142 CN 200410068142 A CN200410068142 A CN 200410068142A CN 1603817 A CN1603817 A CN 1603817A
Authority
CN
China
Prior art keywords
integral
highly effective
organic phase
chromatographic column
liquid phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 200410068142
Other languages
Chinese (zh)
Inventor
许旭
鲍笑岭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Institute of Organic Chemistry of CAS
Original Assignee
Shanghai Institute of Organic Chemistry of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Institute of Organic Chemistry of CAS filed Critical Shanghai Institute of Organic Chemistry of CAS
Priority to CN 200410068142 priority Critical patent/CN1603817A/en
Publication of CN1603817A publication Critical patent/CN1603817A/en
Pending legal-status Critical Current

Links

Images

Abstract

This invention relates to a bonding cyclodextrin compound high efficient liquid chromatogram organic bulk column and its process method. The bulk column quality is multiple-hole space glyceryl methacrylate and ethylidene methacrylate polymer. The liquid chromatographic column in this invention can be used in isolation of small molecule of sample, chirality compound isolation, and biological large molecule isolation.

Description

Highly effective liquid phase and organic phase integral chromatographic column of bonding cyclodextrin compounds and preparation method thereof
Technical field:
The invention provides the preparation of the highly effective liquid phase and organic phase integral chromatographic column of bonding cyclodextrin compounds.Integral post matrix is the glycidyl methacrylate-EDMA ethylene dimethacrylate polymkeric substance of the build of porous.It is characterized in that the cyclodextrin or derivatives thereof is bonded on the integral post matrix, can obtain to be used for the high performance liquid chromatography organic whole post of micromolecule separation and chiral resolution.
Background technology:
Integral post (monolithic column) claims overall fixed phase (monolithic stationary phase), excellent post (rod), continuous bed (continuous bed) etc. again, be in column jecket in-situ polymerization or immobilization continuous whole porous structure, can make corresponding derivatization to the surface of integral material as required, be a kind of novel in tubing string with the mode of original position (in situ) polymerization form be used for compartment analysis or as the porous medium of reactor.The integral post material that is used for high performance liquid chromatography comprises inorganic and organic polymer two classes equally.The former mainly prepares with sol-gel process; The latter mainly is divided into following a few class at present: polyacrylamide, polymethacrylate and polystyrene type.
Document (Liao J L, Zhang R, Hjert é n S.J.Chromatogr., 1991,586:21-26; ZengC M, Liao J L, Nakazato K, et al.J.Chromatogr., 1996,753:227-234) the aqueous polymerization method of report polyacrylamide integral post.Other has bibliographical information (Xie S F, Svec F, Fr é chet J MJ.J.Chromatogr.A, 1997,775:65-72; Xie S F, Svec F, Fr é chet J M J.J.Polym.Sci.A, 1997,35:1013-1021) the organic phase polymerization prepares the polyacrylamide integral post.The characteristics of this class integral post are: good bio-compatibility is arranged, be fit to the big molecule of separating bio, as albumen, nucleic acid and polysaccharide.
Document about poly-(glycidyl methacrylate-EDMA ethylene dimethacrylate) integral post is (Svec F, Fr é chet J M J.Anal.Chem., 1992,64:820-822; Svec F, Fr é chet J MJ.J.Chromatogr.A, 1995,702:89-93).For the epoxide group in the polymkeric substance, the author has adopted two kinds of derivation modes: 1. pump into the 0.5mol/mL aqueous sulfuric acid, 60 ℃ of reactions of water-bath 3h obtains containing the porous polymer that functionalized with glycols is rolled into a ball like this.2. inject the 2mL diethylamine, add thermal response, obtain containing the separable albumen of ion-exchange chromatography of 1-(N, N-diethylamide)-2-hydroxypropyl functional group.
About poly-(styrene-divinylbenzene) integral post, existing report (Oberacher H, Parson W, Muhlmann R.Anal.Chem., 2001,73:5109-5115; Premstaller A, Oberacher H, Huber C G.Anal.Chem., 2000,72:4386-4393; Moore R E, Licklider L, SchumannD, et al.Anal.Chem., 1998,70:4879-4884) mostly be analysing protein or nucleic acid (strand and two strands).Fr é chet group report (Petro M, Svec F, Gitsov I, et al.Anal.Chem., 1996,68:315-321; Petro M, Svec F, Fr é chet J M J.J.Chromatogr.A, 1996,752:59-66; Wang Q C, Svec F, Fr é chet J M J.Anal.Chem., 1993,65:2243-2248) developed precipitation-molten again chromatogram (" On-Column " Precipitation-Redissolution Chromatography), and separated cinnamic oligomer and superpolymer at post with made polystyrene integral post.
The method that obtains the chiral resolution integral post at present mainly is polyalcohol integral pole (Matsui J, Kato T, Takeuchi T, et al.Anal.Chem., 1993, the 65:2223-2224 of the synthetic other molecule trace type of situ aggregation method; Huang Xiaodong (Huang X D) Zou Hanfa (Zhou H F) Mao Xiqin (Mao X Q). chromatogram (Chinese Journal of Chromatography), 2002,20:436-438).The present invention uses the directly method of bonded chiral selective agent on matrix, and the integral post that is obtained has wider range of application, and the fractionation that can be used for various micromolecule separation, multiple chipal compounds separates and the biomacromolecule separation.
Summary of the invention
The problem that will solve of the present invention be to provide bonding cyclodextrin compounds highly effective liquid phase and organic phase integral chromatographic column and preparation method thereof.Bonding has the cyclodextrin or derivatives thereof on this integral post, can use in high performance liquid chromatography.
The invention provides a kind of bonding cyclodextrin compounds highly effective liquid phase and organic phase integral chromatographic column, bonding has the cyclodextrin or derivatives thereof on this integral post, can use in high performance liquid chromatography.Have hydroxyl to exist before described cyclodextrin or derivatives thereof is recommended in and is bonded, this hydroxyl can be unsubstituted hydroxyl, also can be the hydroxyl on the substituted radical.Described substituted radical is recommended as C 1~C 6Alkyl, hydroxyalkyl (wherein alkyl is C 1~C 6Alkyl or alkyl ether).Described cyclodextrine derivatives can be a hydroxypropyl, 2,6-dimethyl beta-CD, permethylated β-CD, part methyl β-CD, hydroxyethyl β-CD, 2,3-dioxy acetyl β-CD, 1-(1-naphthyl) ethyl carbamyl β-CD, sulfonation β-CD, sulfobutyl-beta-CD, sulfoethyl β-CD, ethyloic β-CD, carboxyethyl β-CD, 6A-methylamino β-CD, 6A, 6D-dimethylamino β-CD and β-CD polymkeric substance; Described β-CD represents beta-schardinger dextrin-.Described cyclodextrin or derivatives thereof further is recommended as β-CD (beta-schardinger dextrin-), hydroxyethyl beta-schardinger dextrin-or HP-β-CD (the beta-schardinger dextrin-hydroxypropyl ether claims hydroxypropyl again).Described cyclodextrin or derivatives thereof further is recommended as β-CD or HP-β-CD.Described integral post matrix is recommended as the glycidyl methacrylate-EDMA ethylene dimethacrylate polymkeric substance of the build of porous.
The invention provides the preparation method of above-mentioned highly effective liquid phase and organic phase integral chromatographic column, this method is that the mode of described cyclodextrin or derivatives thereof by derivatization on the post is bonded on the integral post matrix.Promptly prepare integral post matrix earlier, the derivatization reaction potpourri is reacted with it by matrix obtain.
Wherein said integral post matrix recommends by glycidyl methacrylate (GMA) and EDMA ethylene dimethacrylate (EDM4) to obtain with azoisobutyronitrile (AIBN) initiated polymerization in the presence of pore-foaming agent lauryl alcohol and cyclohexanol.
Wherein GMA is a monomer, and EDMA is a crosslinking chemical, and lauryl alcohol and cyclohexanol are as pore-foaming agent, and AIBN is as initiating agent.It is pure that GMA, EDMA, lauryl alcohol, cyclohexanol are at least homemade analysis, recommends through decompression distillation before using; It is pure that AIBN is recommended as analysis, recommends through recrystallization before using.The polymerization of recommending is GMA: EDMA=2: 3-3 with the composition and the proportioning of potpourri: 2 (mass ratioes), lauryl alcohol: cyclohexanol=9: 1-7: 3 (mass ratioes), monomer and crosslinking chemical: pore-foaming agent=1: 3-1: 1 (mass ratio), AIBN are the 0.5-2% (mass percent) of monomer and crosslinking chemical.Be recommended in to mix afterwards and use behind the helium injection gas 15min.Recommend all now with the current at every turn.Recommendation pours in the pipe after polymerization is mixed in proportion with potpourri, and seal at two ends, vertically is put in to carry out polyreaction in the water-bath.Polymeric reaction condition is recommended as follows: polymerization temperature 55-60 ℃, preferred value is 57 ℃; Reaction time 10-48h.
After polymerization finishes the integrated substrate post that makes being packed into, (described column sleeve is Z-MODULE for example for column sleeve TMRadial Compression Separation System, available from Waters company, Waters Corporation, MA01757 USA), recommends to utilize ethanol, recommend flow velocity 0.5mL/min flushing 2-3h, not reacted monomer, crosslinking chemical and pore-foaming agent are rinsed well fully.Afterwards, recommending with ACN is moving phase, flow velocity is recommended as 1mL/min, recommend 254nm to detect, recommend with biphenyl, naphthalene and ethyl benzoate as the micromolecule sample, post effect to integral post matrix is done preliminary evaluation, recommends to select the matrix post that post is imitated more than 400NTP/10cm to do further derivatization experiment.
The derivatization reagent compound method is recommended as: β-CD or HP-β-CD are dissolved in DMSO/ACN (volume ratio is 2: 1-1: 3, preferred 1: the 1) mixed solution, and wherein the amount ratio of β-CD or HP-β-CD and DMSO/ACN is recommended as/100 milliliters of 3-15 grams, adds BF 3Et 2O (BF 3Content be recommended as 46.8-47.8%), BF wherein 3Et 2The consumption of O is recommended about 1-10% (percent by volume), preferred 3.5%.Utilize the HPLC infusion to go in the integrated substrate post derivatization reagent, the realization under the room temperature circulates in the post derivatization.Behind the recommendation response 48h, utilize the HPLC pump that the DMSO/ACN mixed solution of equal volume ratio is injected integral post, material and unreacted derivatization reagent that possible derivatization produces are replaced out.
After the integral post preparation is finished, carry out conventional post and imitate evaluation (recommend: moving phase is ACN, and flow velocity 1mL/min, sample are micromolecular compounds such as naphthalene), and estimate before and after the derivatization variation of same sample retention behavior on pillar.For the chiral resolution ability of integral post, can utilize chirality samples such as styrax, moving phase is recommended as ACN/H 2O=75: 25, under 254nm, detect.
The preparation method of high performance liquid chromatography organic whole post provided by the invention can at room temperature be bonded to β-CD or HP-β-CD on the integrated substrate post, is used for the analysis of micromolecule sample, and chiral resolution.Liquid-phase chromatographic column provided by the invention can be used for the analysis of micromolecule sample separation, chipal compounds splits and separates with biomacromolecule.
Description of drawings:
1, Fig. 1 is the liquid phase spectrogram that β-CD integral post is separated naphthalene, ethyl benzoate and Pa Zuosha star potpourri
2, Fig. 2 is the liquid phase spectrogram that HP-β-CD integral post is separated biphenyl, ethyl benzoate and dinaphthol potpourri.
3, Fig. 3 is that HP-β-CD integral post is separated benzoic liquid phase spectrogram.
Embodiment:
Embodiment one
The polymerization configuration of potpourri and the preparation of integrated substrate post:
It is now with the current to share potpourri, gets GMA8g, EDMA12g, and cyclohexanol 27g, lauryl alcohol 3g and AIBN0.2g mix, and use behind the helium injection gas 15min.Polymerization pours in the nylon column jecket of internal diameter 8mm, effective length 10cm with potpourri, and seal at two ends, vertically is put in 57 ℃ the water-bath to react 12h.The integrated substrate post that the makes column sleeve (Z-MODULE that packs into TMRadial Compression SeparationSystem, available from Waters company, Waters Corporation, MA 01757, USA) in, receive on the HPLC pump, with flow velocity 0.5mL/min, flushing 2-3h removes unreacted intact monomer, crosslinking chemical and pore-foaming agent fully with ethanol.Afterwards, be moving phase with ACN, flow velocity is 1mL/min, 254nm detects, as the micromolecule sample, the post effect of integral post matrix is done preliminary evaluation with biphenyl, naphthalene and ethyl benzoate, select the matrix post that post is imitated more than 400NTP/10cm to do further derivatization experiment.
The preparation method of β-CD integral post:
Preparation derivatization solution (moving phase): use anhydrous Na 2SO 4DMSO/ACN (volume ratio is 1: 1) the mixed solution 100mL that handles 24h is positioned in the beaker of 250mL; Add BF while stirring 3Et 2O (content is 46.8-47.8%) 3.3mL; Add dry β-CD6.17g while stirring and (be equivalent to 5.4 * 10 -3Mol), treat that it dissolves fully.Derivatization solution is gone in the integrated substrate post room temperature moving phase/derivatization reagent circulation two days of ordering, flow velocity 0.3mL/min with the HPLC infusion; Use the moving phase of DMSO/ACN (volume ratio is 1: 1) that the β-CD in the pillar is rinsed well then, last, wash with ACN.
The high performance liquid chromatogram experiment condition is as follows:
Use ultraviolet 254nm to detect, room temperature is used ACN/H 2((volume ratio) is moving phase to O=75/25, and flow velocity is 1mL/min.
Sample is naphthalene, ethyl benzoate and the Pa Zuosha star mixed solution with the moving phase preparation.
β-CD integral post is separated the liquid phase spectrogram of naphthalene, ethyl benzoate and Pa Zuosha star biased sample, as shown in Figure 1.
Embodiment two
The configuration of polymerization usefulness potpourri and the preparation of integrated substrate post are with embodiment one.
The preparation method of HP-β-CD integral post:
Method at the post derivatization is similar to embodiment one: derivatization solution is the DMSO/ACN (volume ratio is 1: 1) of 155mL, contains HP-β-CD 8.18g, BF 3Et 2O (content is 46.8-47.8%) is 5mL.Under the room temperature, make derivatization solution circulation two days; The moving phase of using DMSO/ACN (volume ratio is 1: 1) is then rinsed the β of the HP-in the pillar-CD flushing well at last with ACN, carry out the evaluation of derivatization rear pillar.
The high performance liquid chromatogram experiment condition is as follows:
Use ultraviolet 254nm to detect, room temperature is used ACN/H 2O=75/25 (volume ratio) is a moving phase, and flow velocity is 1.0mL/min.
Sample is biphenyl, ethyl benzoate and the dinaphthol mixed solution with the moving phase preparation.
HP-β-CD integral post is separated the liquid phase spectrogram of biphenyl, ethyl benzoate and dinaphthol potpourri, as shown in Figure 2.
Use ultraviolet 254nm to detect, room temperature is used ACN/H 2O=75/25 (volume ratio) is a moving phase, and flow velocity is 0.8mL/min.
Sample is the styrax enantiomorph solution with the moving phase preparation.
HP-β-CD integral post is separated the liquid phase spectrogram of styrax enantiomorph, as shown in Figure 3.

Claims (11)

1. a highly effective liquid phase and organic phase integral chromatographic column is characterized in that bonding has the cyclodextrin or derivatives thereof on this organic phase integral post.
2. highly effective liquid phase and organic phase integral chromatographic column according to claim 1 is characterized in that described cyclodextrin or derivatives thereof has hydroxyl to exist before being bonded, this hydroxyl can be the hydroxyl on unsubstituted hydroxyl or the substituted radical, and described substituted radical is C 1~C 6Alkyl, hydroxyalkyl.
3. highly effective liquid phase and organic phase integral chromatographic column according to claim 1, it is characterized in that described cyclodextrine derivatives is a hydroxypropyl, 2,6-dimethyl beta-CD, permethylated β-CD, part methyl β-CD, hydroxyethyl β-CD, 2,3-dioxy acetyl β-CD, 1-(1-naphthyl) ethyl carbamyl β-CD, sulfonation β-CD, sulfobutyl-beta-CD, sulfoethyl β-CD, ethyloic β-CD, carboxyethyl β-CD, 6A-methylamino β-CD, 6A, 6D-dimethylamino β-CD and β-CD polymkeric substance; Described β-CD represents beta-schardinger dextrin-.
4. highly effective liquid phase and organic phase integral chromatographic column according to claim 1 is characterized in that described cyclodextrine derivatives is hydroxypropyl or hydroxyethyl beta-schardinger dextrin-.
5. highly effective liquid phase and organic phase integral chromatographic column according to claim 1 is characterized in that the glycidyl methacrylate-EDMA ethylene dimethacrylate polymkeric substance of the build that described integral post matrix is porous.
6. the preparation method of highly effective liquid phase and organic phase integral chromatographic column according to claim 1 is characterized in that the mode of cyclodextrin or derivatives thereof by derivatization on the post is bonded on the integral post matrix.
7. the preparation method of highly effective liquid phase and organic phase integral chromatographic column according to claim 6 is characterized in that described cyclodextrin or derivatives thereof is at boron trifluoride (BF 3) catalysis down with integral post matrix on epoxide group react.
8. the preparation method of highly effective liquid phase and organic phase integral chromatographic column according to claim 6 is characterized in that the cyclodextrin or derivatives thereof is that to be dissolved in volume ratio be 2: 1-1: in the mixed solution of 3 dimethyl sulfoxide (DMSO) (DMSO)/acetonitrile (ACN), at BF 3Catalysis under with in the mode of post derivatization and the reaction of the epoxide group on the integral post matrix; BF 3Content in the mixed solution of DMSO/ACN is in 0.5-5% (mass percent).
9. the preparation method of highly effective liquid phase and organic phase integral chromatographic column according to claim 6 is characterized in that the mixed solution of DMSO/ACN must be through removing water treatment.
10. the preparation method of highly effective liquid phase and organic phase integral chromatographic column according to claim 6, it is characterized in that described integral post matrix be by glycidyl methacrylate (GMA) and EDMA ethylene dimethacrylate (EDMA) in the presence of pore-foaming agent lauryl alcohol and cyclohexanol, obtain with azoisobutyronitrile (AIBN) initiated polymerization.
11. preparation method according to claim 6 or 10 described highly effective liquid phase and organic phase integral chromatographic columns, it is characterized in that polymerization is GMA: EDMA=2: 3-3 with the composition and the proportioning of potpourri: 2 (mass ratioes), lauryl alcohol: cyclohexanol=9: 1-7: 3 (mass ratioes), monomer GMA and crosslinking chemical EDMA: pore-foaming agent=1: 3-1: 1 (mass ratio), AIBN are the 0.5-2% (mass percent) of monomer and crosslinking chemical; Polymerization temperature is 55-60 ℃, and the reaction time is 10-48h.
CN 200410068142 2004-11-12 2004-11-12 Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof Pending CN1603817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200410068142 CN1603817A (en) 2004-11-12 2004-11-12 Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200410068142 CN1603817A (en) 2004-11-12 2004-11-12 Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof

Publications (1)

Publication Number Publication Date
CN1603817A true CN1603817A (en) 2005-04-06

Family

ID=34666771

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200410068142 Pending CN1603817A (en) 2004-11-12 2004-11-12 Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof

Country Status (1)

Country Link
CN (1) CN1603817A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101537344B (en) * 2009-04-23 2011-05-18 中国科学院化学研究所 Monolithic column, preparation method and application thereof
CN101348577B (en) * 2007-07-17 2011-07-27 中国科学院化学研究所 Porous integral medium, preparation and use thereof
CN101077894B (en) * 2006-05-26 2011-10-19 广州研创生物技术发展有限公司 Beta-cyclodextrins chiral selecting agent and preparation method thereof
CN102924708A (en) * 2012-11-01 2013-02-13 天津奥顺达科技有限公司 Synthesis and application of novel cyclodextrin polymer chiral resolving agents
CN102940979A (en) * 2012-10-22 2013-02-27 暨南大学 Method and application for preparing cyclodextrin organic polymer capillary monolithic column via one-step method
CN104415740A (en) * 2013-09-04 2015-03-18 北京蛋白质组研究中心 Hydrophilic chromatographic packing as well as preparation method and application thereof
CN105092764A (en) * 2015-09-14 2015-11-25 浙江工业大学 Method for detecting migration quantity of methacrylic acid in food plastic packaging material by using online derivatization-gas chromatography
CN107709251A (en) * 2015-06-16 2018-02-16 安捷伦科技有限公司 For analyzing the composition and method of sample preparation
CN110636899A (en) * 2017-06-30 2019-12-31 昭和电工株式会社 Packing material for liquid chromatography and column for liquid chromatography
CN114280134A (en) * 2021-09-30 2022-04-05 宁波大学 Reagent and method for analyzing enantiomer structures of two-paired binaphthyl derivatives

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101077894B (en) * 2006-05-26 2011-10-19 广州研创生物技术发展有限公司 Beta-cyclodextrins chiral selecting agent and preparation method thereof
CN101348577B (en) * 2007-07-17 2011-07-27 中国科学院化学研究所 Porous integral medium, preparation and use thereof
CN101537344B (en) * 2009-04-23 2011-05-18 中国科学院化学研究所 Monolithic column, preparation method and application thereof
CN102940979A (en) * 2012-10-22 2013-02-27 暨南大学 Method and application for preparing cyclodextrin organic polymer capillary monolithic column via one-step method
CN102924708A (en) * 2012-11-01 2013-02-13 天津奥顺达科技有限公司 Synthesis and application of novel cyclodextrin polymer chiral resolving agents
CN104415740A (en) * 2013-09-04 2015-03-18 北京蛋白质组研究中心 Hydrophilic chromatographic packing as well as preparation method and application thereof
CN104415740B (en) * 2013-09-04 2017-02-08 北京蛋白质组研究中心 Hydrophilic chromatographic packing as well as preparation method and application thereof
CN107709251A (en) * 2015-06-16 2018-02-16 安捷伦科技有限公司 For analyzing the composition and method of sample preparation
CN105092764A (en) * 2015-09-14 2015-11-25 浙江工业大学 Method for detecting migration quantity of methacrylic acid in food plastic packaging material by using online derivatization-gas chromatography
CN110636899A (en) * 2017-06-30 2019-12-31 昭和电工株式会社 Packing material for liquid chromatography and column for liquid chromatography
CN110636899B (en) * 2017-06-30 2023-03-24 昭和电工株式会社 Packing material for liquid chromatography and column for liquid chromatography
CN114280134A (en) * 2021-09-30 2022-04-05 宁波大学 Reagent and method for analyzing enantiomer structures of two-paired binaphthyl derivatives

Similar Documents

Publication Publication Date Title
Matsui et al. Molecular recognition in continuous polymer rods prepared by a molecular imprinting technique
Zhang et al. Novel polymer monolith microextraction using a poly (methacrylic acid-ethylene glycol dimethacrylate) monolith and its application to simultaneous analysis of several angiotensin II receptor antagonists in human urine by capillary zone electrophoresis
Svec et al. Monolithic stationary phases for capillary electrochromatography based on synthetic polymers: designs and applications
Schmid et al. Chiral separation of amino acids by ligand‐exchange capillary electrochromatography using continuous beds
Ou et al. Polyhedral oligomeric silsesquioxanes as functional monomer to prepare hybrid monolithic columns for capillary electrochromatography and capillary liquid chromatography
Gou et al. In-tube solid-phase microextraction coupled to capillary LC for carbamate analysis in water samples
Nishi et al. Enantiomeric separation of drugs by mucopolysaccharide-mediated electrokinetic chromatography
Schaller et al. Separation of antidepressants by capillary electrophoresis with in-line solid-phase extraction using a novel monolithic adsorbent
Hu et al. Determination of estrogens in pork and chicken samples by stir bar sorptive extraction combined with high-performance liquid chromatography–ultraviolet detection
Lin et al. Novel highly hydrophilic methacrylate-based monolithic column with mixed-mode of hydrophilic and strong cation-exchange interactions for pressurized capillary electrochromatography
Wang et al. Enantioseparation of N-derivatized amino acids by micro-liquid chromatography using carbamoylated quinidine functionalized monolithic stationary phase
Shu et al. Chemical anchoring of lauryl methacrylate-based reversed phase monolith to 1/16 ″od polyetheretherketone tubing
CN1603817A (en) Highly effective liquid phase and organic phase integral chromatographic column for bonding cyclodextrin compounds and preparing process thereof
D’Orazio et al. Enantiomers separation by capillary electrochromatography using polysaccharide‐based stationary phases
Wang et al. Sulfoalkylbetaine‐based monolithic column with mixed‐mode of hydrophilic interaction and strong anion‐exchange stationary phase for capillary electrochromatography
Wang et al. Preparation and evaluation of a neutral methacrylate-based monolithic column for hydrophilic interaction stationary phase by pressurized capillary electrochromatography
Ou et al. Enantioseparation of tetrahydropalmatine and Tröger's base by molecularly imprinted monolith in capillary electrochromatography
Aydoğan A new anion-exchange/hydrophobic monolith as stationary phase for nano liquid chromatography of small organic molecules and inorganic anions
Lin et al. Preparation of a mixed-mode hydrophilic interaction/anion-exchange polymeric monolithic stationary phase for capillary liquid chromatography of polar analytes
Guo et al. Effect of the crosslinker type on the enantioseparation performance of β-cyclodextrin functionalized monoliths prepared by the one-pot approach
Fu et al. Monolithic columns with mixed modes of reversed-phase and anion-exchange stationary phase for capillary electrochromatography
CN104316628B (en) Molecule crowding agent and ionic liquid are the method that pore-foaming agent prepares trace integral post
Wang et al. Electrochromatographic characterization of methacrylate-based monolith with mixed mode of hydrophilic and weak electrostatic interactions by pressurized capillary electrochromatography
Zhang et al. A hybrid fluorous monolithic capillary column with integrated nanoelectrospray ionization emitter for determination of perfluoroalkyl acids by nano-liquid chromatography–nanoelectrospray ionization-mass spectrometry/mass spectrometry
Huang et al. Octyl-type monolithic columns of 530 μm id for capillary liquid chromatography

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication