EP3803379A1 - Hochaufgelöste flüssigchromatographie basierend auf einem sägezahngradienten - Google Patents
Hochaufgelöste flüssigchromatographie basierend auf einem sägezahngradientenInfo
- Publication number
- EP3803379A1 EP3803379A1 EP18733192.1A EP18733192A EP3803379A1 EP 3803379 A1 EP3803379 A1 EP 3803379A1 EP 18733192 A EP18733192 A EP 18733192A EP 3803379 A1 EP3803379 A1 EP 3803379A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- solvent
- vol
- mobile phase
- polymer
- gradient
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/34—Control of physical parameters of the fluid carrier of fluid composition, e.g. gradient
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
- G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
- G01N2030/885—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds involving polymers
Definitions
- the present invention relates to a method of analyzing a polymer sample, the method comprising performing a liquid chromatography analysis on a chromatography column having a mobile phase containing a mixture of at least one non-solvent (S1) and at least one solvent (S2) for the polymer sample characterized in that the volume fraction of S2 in the mobile phase during the elution process is varied stepwise and the steps alternately ascend and descend.
- S1 non-solvent
- S2 solvent
- Chromatography is a physical separation method in which the components to be separated are distributed between two phases, one stationary (stationary phase) and the other (mobile) moving in a defined direction.”
- Liquid chromatography is a separation method in which the mobile phase is a liquid. Liquid chromatography can be carried out in a column or on a plate. "Liquid chromatography includes separation methods such as SEC (size exclusion chromatography), HPLC (high pressure liquid chromatography) and IC (ion chromatography).
- the liquid chromatography can be divided once again on the basis of the composition of the mobile phase in isocratic analysis and gradient analysis.
- the composition of the mobile phase remains constant throughout the elution process, whereas in the gradient analysis the composition is varied continuously or stepwise.
- Polymers are macromolecules composed of monomers. As a result of the sequential structure or the individual repeat units and the corresponding reaction regime, this results in macromolecules which have distributions with respect to different substance sizes. Depending on the chemical composition, distributions can occur with regard to the chemical functionality, the molar mass or in the structure.
- the polydispersity indicates, for example, how narrow or wide the molecular weight distribution is.
- HPLC analysis methods for polymers by means of gradient analysis are known from the prior art.
- W.J. Staal (Dissertation, University of Eindhoven, 1996) provides a good overview of the genesis and development of gradient elution chromatography (GPEC).
- GPEC gradient elution chromatography
- EP3170836A1 discloses a step-gradient RP-HPLC (reverse phase) analysis method, however, which is applicable to complex polypeptide mixtures such as glatiramer acetate or similar mixtures is described. Here is a gradual change in the solvent -
- Non-solvent mixture used over time.
- the less polar solvent is increased by 2-4 vol% every 4 to 6 minutes.
- the profile resembles a staircase function.
- Kajdan et al. J. Chromatogr. A 1189 (2008) 183-195 disclose a two-dimensional gradient method with a spike gradient for analyzing polypeptides, in which method the composition of the mobile phase is maintained for a defined time before returning however, this gradient is used for cation exchange in the first dimension, whereas in the RP-LC (reversed-phase LC) an ordinary linear gradient is used in the second dimension.
- RP-LC reversed-phase LC
- Spranger et al. disclose a two-dimensional analysis method for atmospheric HULIS (humic-like substances) that combines SEC (size-exclusion chromatography) in one dimension and RP-HPLC in the other dimension ,
- SEC size-exclusion chromatography
- RP-HPLC a novel spike gradient is used in which the organic solvent content of the mobile phase regularly increases, decreases, and remains constant.
- the object is achieved by a method for analyzing a polymer sample, the method comprising carrying out a liquid chromatography analysis on a chromatography column having a mobile phase comprising a mixture of at least one non-solvent (S1) and at least one solvent (S2) for the polymer sample, characterized in that the volume fraction of S2 in the mobile phase is varied stepwise during the elution process and the steps alternately ascend and descend.
- a method for analyzing a polymer sample comprising carrying out a liquid chromatography analysis on a chromatography column having a mobile phase comprising a mixture of at least one non-solvent (S1) and at least one solvent (S2) for the polymer sample, characterized in that the volume fraction of S2 in the mobile phase is varied stepwise during the elution process and the steps alternately ascend and descend.
- S1 non-solvent
- S2 solvent
- Figures 1A-C show the schematic structure of a 2-dimensional step gradient ("Säge leopardgradient") in
- Figure 2A shows a chromatogram of PVC measured with a linear gradient
- Figure 2B shows a chromatogram of PVC measured with a step gradient
- Figure 2C shows a chromatogram of PVC measured with a sawtooth gradient in trapezoidal shape (see Example 1).
- Figure 3A shows a chromatogram of PMMA measured with a linear gradient
- Figure 3B shows a chromatogram of PMMA measured with a sawtooth gradient in trapezoidal shape (see Example 3).
- Figure 4A shows a chromatogram of PPG measured with a linear gradient
- Figure 4B shows a chromatogram of PPG measured with a sawtooth gradient in trapezoidal shape (see Example 3).
- Figure 5A shows a chromatogram of PDMS measured with a linear gradient
- Figure 5B shows a chromatogram of PDMS measured with a sawtooth gradient in trapezoidal shape (see Example 3).
- Figure 6A shows a chromatogram of PMMA 690,000 measured as a 2-dimensional sawtooth gradient in trapezoidal shape
- Figure 6B shows a chromatogram of PMMA 690,000 measured as a 3-dimensional sawtooth in trapezoidal shape (see Example 4).
- FIG. 7 shows a chromatogram of a mixture of PDMS, PMMA and PPG of similar average molar mass measured with a sawtooth gradient in trapezoidal shape (see Example 5).
- the present invention relates to a method for analyzing a polymer sample, the method comprising performing a liquid chromatography analysis on a chromatography column with a mobile phase containing a mixture of at least one non-solvent (Sl) and at least one solvent (S2) for the polymer sample, characterized in that the volume fraction of S2 in the mobile phase is varied stepwise during the elution process and the steps alternately ascend and descend.
- a polymer sample in the sense of the present invention may be a polymer or a polymer mixture.
- a polymer is to be understood as meaning a chemical substance which is of constitutional origin Repeating units and has an average molar mass in the range of a few thousand to several million g / mol, this includes both homopolymers and copolymers.
- polymers examples include organic synthetic polymers such as polyvinyl chloride, polyethylene, polypropylene, polyvinyl acetate, polycarbonate, poly (meth) crylates, polystyrene, polyacrylonitrile, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, polyvinylidene cyanide, polybutadiene, polyisoprene, polyethers, polyesters, polyamide, polyimide, polysiloxanes , Polysilanes, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylamide, polyethylene glycol and their derivatives and copolymers, and natural polymers such as cellulose, starch, casein and natural rubber, and semi-synthetic high molecular weight compounds such as cellulose derivatives, eg. Methylcellulose, hydroxymethylcellulose and carboxymethylcellulose.
- a polymer mixture preferably contains at least two polymers of this group.
- poly (meth) acrylates are to be understood as meaning both polyacrylates and polymethacrylates and also polyalkyl acrylates and polyalkyl methacrylates, where alkyl is preferably a linear or branched C 1 -C 20 hydrocarbon radical.
- alkyl is preferably a linear or branched C 1 -C 20 hydrocarbon radical.
- poly (meth) acrylates are polymethyl (meth) acrylates, polyethyl (meth) acrylates,
- polysiloxanes are compounds of the general formula (I)
- R x is independently hydrogen, straight, branched, acyclic or cyclic, saturated or mono- or polyunsaturated C 1 -C 20 - hydrocarbon radical, hydroxy radical, vinyl radical, alkoxy group, amino group, halogen or silyloxy group of the general formula (II)
- R y are independently hydrogen, halogen, an unbranched , branched, linear, acyclic or cyclic, saturated or poly-saturated C 1 -C 20 -hydrocarbon radical, it being possible for individual carbon atoms to be replaced by oxygen, halogen, nitrogen or sulfur,
- radicals R x and R y are the radicals hydrogen, methyl, ethyl, propyl, phenyl and chlorine, with methyl being the most preferred.
- examples of polysiloxanes are polydimethylsiloxane and aminopolydimethylsiloxane.
- the polymers are usually used with an average molar mass in the range of 1,000-2,000,000 g / ol.
- Polyvinyl chloride is usually used with an average molar mass in the range of 20,000-1,000,000 g / mol
- Pol (meth) acrylates are usually used with an average molar mass in the range of 15,000 to 2,000,000 g / mol
- polysiloxanes and polysilanes Usually used with an average molar mass in the range of 1,000-500,000 g / mol
- polystyrene is usually used with a medium
- Polypropylene glycol is usually used with an average molar mass in the range of 4,000-30,000 g / mol
- polyvinyl alcohol and polyvinyl acetate are usually used with an average molar mass in a range of 1,000 -100,000 g / mol used.
- Chromatography columns generally have no limitations. As chromatographic columns, it is possible to use all the columns known to the person skilled in the art for liquid chromatography, in particular commercially available columns, ie SEC columns, HPLC columns and IC columns. Preferred are SEC columns and HPLC columns, with HPLC columns being particularly preferred.
- the mobile phase used for the liquid chromatography analysis contains a mixture of at least one solvent (S2) and at least one non-solvent (S1) for the polymer sample.
- non-solvents are meant all liquids in which the solubility of a polymer sample is lower than in the solvent. From the literature (e.g., Polymer Data Handbook, 2nd edition, 2009, Oxford University Press), those skilled in the art can see which liquids for which polymer or polymer blend can be used as solvents or non-solvents, respectively.
- solvents and non-solvents may be independently selected from the group consisting of tetrahydrofuran (THF), toluene, cyclohexane, diethyl ether, carbon tetrachloride, dichloromethane, chloroform, 1,4-dioxane, N, -dimethylacetamide, N, -dimethylformamide, benzyl alcohol, methyl ethyl ketone , Ethyl acetate, acetone, acetonitrile, dimethyl sulfoxide, hexafluoroisopropanol, 2- Propanol, methanol, water and mixtures thereof.
- solvents and non-solvents are independently selected from the group consisting of THF, hexafluoroisopropanol, methanol, acetone, water and mixtures thereof.
- Non-solvent and S2 denotes the solvent.
- SA start share
- the analysis method according to the invention can be carried out in a multi-dimensional manner and can therefore be termed n-dimensional, the number of dimensions referring to the number of liquid components of the mobile phase used.
- the variation of the volume fraction of S2 takes place in stages, with the steps alternately ascending and descending (cf. FIG. 1).
- the shape of the steps can be chosen arbitrarily by the person skilled in the art by changing various parameters described below.
- a time interval t is calculated over the column volume t '(formulas 1 and 2), which is the basis of the gradient.
- t ' is freely selectable in a range from 0.1 mL to 1.2 mL.
- the mobile phase consists of a non-solvent S1 and a solvent S2, and the composition of the mobile phase is varied over time as follows,
- composition of the mobile phase is calculated by the following formulas (3-5), the 2-dimensional Describe sawtooth gradients (see Figure 1 and Table 2):
- the proportion of S2 is reduced by the proportion A (e.g., 6 vol%)
- the starting fraction is increased by the proportion B (e.g., 0.2 vol%), and thus is (SA + x * B).
- B e.g. 0. vol%
- SA + x * B the proportion of S1 is in each case (100 - S2)% by volume.
- negative values for the S2 fraction are initially calculated because of the descending levels. However, these negative values are mathematically nonsensical and are therefore equated with the starting fraction of S2 until a positive value for S2 is calculated.
- the number of stages required can be calculated using formula 4.
- the liquid components are preferably THF and methanol.
- the process is repeated at least once in each case with a different mobile phase, in each case the previous solvent serves as a non-solvent and a new solvent is selected.
- the non-solvent is chosen such that it is suitable as solvent for at least some of the polymers in the polymer mixture.
- a separation of the polymer mixture into the individual polymers is achieved via the different solubility of the polymers in the various mobile phases.
- methanol is used as the non-solvent in the first pass and acetone as the solvent, in the second pass acetone is used as the nonsolvent and THF as the solvent.
- This method is a special case of the 2-dimensional gradient.
- the mobile phase consists of two non-solvents S1 and Sl 'and a solvent (S2), and the composition of the mobile phase is varied over time as follows,
- the change in the composition of the mobile phase is calculated from the following formulas (6) and (7), which describe the 3-dimensional sawtooth gradient (cf. Table 4): 0.01 + t + E t (6)
- the starting fraction of S2 is increased by the fraction B (eg, 0.2 vol%) (SA + x * B).
- the proportion of Sl ' is now (100 - S2) vol .-% and the proportion of Sl is still 0 vol .-%.
- negative values for the S2 fraction are initially calculated because of the descending levels. However, these negative values are mathematically nonsensical and are therefore equated with the starting component SA at S2 until a positive value for S2 is calculated.
- Table 4 shows these changes in the composition once more mathematically as an example for the first two stages. This calculation continues accordingly until the last stage, in which a share of S2 of 100 vol .-% is reached.
- the number of stages required can be calculated using formula 7.
- the parameters A, B, C, D and E can generally be freely selected from the following ranges
- the values C, D and E are greater than 0.
- the parameters A, B, C, D and E are selected from the following ranges
- the parameters A, B, C, D and E have the following values: A: 6.0% by volume and B: 0.2% by volume. and C: 1.0 and D: 3.0 and E: 2.0.
- HPLC 1) ThermoFisher Scientific Ultimate 3000 with binary
- Diode array detector HL detection wavelength 215 nm
- Tetrahydrofuran (not stabilized, HPLC grade, Merck Darmstadt), methanol (HPLC grade, Merck Darmstadt) and ultrapure water (conductivity 18.5 Mohrrucm, TOC value ⁇ 4 ppb).
- the target quantities were (1) the number of separated peaks, (2) the resolution, (3) the asymmetry and (4) the peak width in half height optimized.
- the variation of the parameters can be seen in Table 2.
- the test series was carried out on five different commercially available Ghromatographiekla.
- the parameter B is mainly responsible for the number of peaks and therefore the quality of the polymer dissolution.
- the other targets showed a smaller impact by comparison.
- the effective step height B is also crucial. The more steps that are taken, the better the resolution, but the longer the total measurement time. If the measurement time is to be shortened with the smallest effective step height, the effective step length must be considered. The fact that this size is composed of the individual firmly defined sub-steps, which due to the accuracy of the gradient mixer of the pump used, can not be further shortened, another possibility must be found. Another crucial parameter that is included in the calculation of the effective step length is the LC flow.
- the resolving power of the sawtooth gradient is significantly improved as compared to the other analysis techniques the increased number of peaks can be clearly seen (see Figure 2).
- Examples 1-5 show that the process according to the invention can be applied to a large number of polymers, including very large mean molar masses, and also to a large number of polymers
- Chromatography columns can be used. The only prerequisite for the suitability is that a fundamental retention of the analyte to be examined is ensured at the column. However, this is part of the general expertise of the skilled person.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2018/064868 WO2019233576A1 (de) | 2018-06-06 | 2018-06-06 | Hochaufgelöste flüssigchromatographie basierend auf einem sägezahngradienten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3803379A1 true EP3803379A1 (de) | 2021-04-14 |
Family
ID=62705554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18733192.1A Withdrawn EP3803379A1 (de) | 2018-06-06 | 2018-06-06 | Hochaufgelöste flüssigchromatographie basierend auf einem sägezahngradienten |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20210239658A1 (de) |
| EP (1) | EP3803379A1 (de) |
| JP (1) | JP2021526640A (de) |
| KR (1) | KR20200143726A (de) |
| CN (1) | CN112005112A (de) |
| WO (1) | WO2019233576A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112021000135T5 (de) | 2020-06-25 | 2022-06-30 | Nvidia Corporation | Sensorfusion für anwendungen autonomer maschinen durch maschinelles lernen |
| CN113092605B (zh) * | 2021-03-22 | 2023-06-23 | 中国日用化学研究院有限公司 | 一种用于低分子量聚乙二醇检测的分析方法 |
| CN114740105B (zh) * | 2022-03-17 | 2023-11-07 | 重庆医药高等专科学校 | 一种脯氨酸和n-甲基脯氨酸的液相色谱分离检测方法及其应用 |
| CN116448928A (zh) * | 2023-04-24 | 2023-07-18 | 重庆智翔金泰生物制药股份有限公司 | 一种检测重组蛋白产品收获液、中间体、原液中二甲基硅油消泡剂残留的分析方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4988446A (en) * | 1988-05-14 | 1991-01-29 | Exxon Research And Engineering Company | Method for spectroscopic analysis of hydrocarbons |
| ATE156911T1 (de) * | 1994-03-04 | 1997-08-15 | Waters Investments Ltd | Verfahren zum nachweis von polymeren in einer lösung, detektorsystem und eine ein solches detektorsystem beinhaltende chromatographievorrichtung |
| US20060118488A1 (en) * | 2004-06-15 | 2006-06-08 | West Virginia University Research Corporation | Apparatus and method of utilizing a sawed tooth shaped gradient for chromatographic separation |
| EP3170836B1 (de) | 2015-11-23 | 2018-10-24 | Chemi SPA | Rp-hplc-analyse komplexer polypeptidmischungen |
| CN105949284A (zh) * | 2016-05-26 | 2016-09-21 | 吉尔生化(上海)有限公司 | 一种纯化西那普肽的方法 |
| US20190374876A1 (en) * | 2016-07-01 | 2019-12-12 | Michael Dale Hilgert | Novel multimodal oscillatory chromatographic purification system |
| US20180001227A1 (en) * | 2016-07-01 | 2018-01-04 | Michael Dale Hilgert | Novel multimodal oscillatory chromatographic purification system |
-
2018
- 2018-06-06 KR KR1020207032821A patent/KR20200143726A/ko not_active Withdrawn
- 2018-06-06 WO PCT/EP2018/064868 patent/WO2019233576A1/de not_active Ceased
- 2018-06-06 US US15/734,752 patent/US20210239658A1/en not_active Abandoned
- 2018-06-06 EP EP18733192.1A patent/EP3803379A1/de not_active Withdrawn
- 2018-06-06 CN CN201880092594.XA patent/CN112005112A/zh not_active Withdrawn
- 2018-06-06 JP JP2020567756A patent/JP2021526640A/ja not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20210239658A1 (en) | 2021-08-05 |
| CN112005112A (zh) | 2020-11-27 |
| WO2019233576A1 (de) | 2019-12-12 |
| KR20200143726A (ko) | 2020-12-24 |
| JP2021526640A (ja) | 2021-10-07 |
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