A gel permeation chromatograph (GPC) is used to separate the components of a sample by size, this is known as size-exclusion chromatography (SEC).
GPC systems are widely used to analyze polymers and proteins in manufacturing, chemistry, and biology labs for quality control and analysis. GPC systems are composed of porous beads (the gel) inside a column, a pump to move the sample and eluent through the column, and a detector to detect when different analytes are eluted through the column. The detectors can be concentration sensitive or molecular weight sensitive.
Each gel permeation system has a range of sizes it can detect based on the pore sizes of the beads in the column, so before deciding on a system make sure you know the parameters you need. There are different types of porous beads that have varying affinities for materials and it is best for the gel to have a low affinity for the material you wish to analyze.
Discover and compare Gel Permeation Chromatography Systems:
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| Company | Polymer Char | Polymer Char | Polymer Char |
| Item | GPC-IR® System | GPC-QC Instrument | SGIC 2D Instrument |
| Citations | | | |
| Catalog Number | GPC-IR | GPC-QC | SGIC 2D |
| Price | | | |
| Type | High Temperature Gel Permeation Chromatograph | Compact High-temperature GPC | Two-Dimensional Solvent Gradient Interaction Chromatograph |
| Detector(s) | Infrared Detector IR4, Infrared Detector IR5 MCT, Viscometer Detector, Light Scattering Detector | Infrared Detector IR4 and IR5 MCT, Viscometer | Infrared Detector IR4 and IR5 MCT |
| Column Temp. Range | 40 °C to 250 °C (columns-dependent) | Inquire | Inquire |
| Description | GPC-IR system is a reliable and fully automated high temperature Gel Permeation Chromatograph (GPC/SEC) instrument with up to four most sensitive detectors to measure the molar mass distribution and the chemical composition (short-chain branching information) of polyolefins. Three different infraredGPC-IR system is a reliable and fully automated high temperature Gel Permeation Chromatograph (GPC/SEC) instrument with up to four most sensitive detectors to measure the molar mass distribution and the chemical composition (short-chain branching information) of polyolefins. Three different infrared detectors are available: IR4, which offers a broader spectral range enabling the analysis of the carbonyl group containing copolymers; the IR5, with enhanced sensitivity and stability to determine molecular weight and chemical composition (SCB/1000TC); and the latest IR6, which offers the same superior performance as IR5 and has the additional capability of measuring carbonyls group in the band of 1740 cm-1. A Viscometer and Light-scattering detectors can also be coupled to the GPC-IR system for a full characterization.
GPC-IR is the only system specifically dedicated to polyolefin characterization, incorporating many of the features previously demanded by experienced high temperature GPC Users: - Comprehensive Detection for Polyolefins
- Automated Sample Preparation
- Comprehensive Calculations Software
- Modular Design
Recommended specially for polymers such as High-Density Polyethylene (HDPE), Polypropylene (PP), Low-Density Polyethylene (LDPE), Linear Low-Density Polyethylene (LLDPE), EP copolymers, EVA, EBA and others in the group of polyolefins.... Read More | GPC-QC is a compact, high-temperature GPC instrument for quality control in polyolefin manufacturing lines. The instrument has a simple and reliable approach that provides robust and precise Molar Mass Distribution for process control.
GPC-QC provides highly significant data in the production of GPC-QC is a compact, high-temperature GPC instrument for quality control in polyolefin manufacturing lines. The instrument has a simple and reliable approach that provides robust and precise Molar Mass Distribution for process control.
GPC-QC provides highly significant data in the production of complex multiple reaction products because it measures the whole Molar Mass Distribution.
GPC-QC delivers the complete Molar Mass Distribution for one sample through a simplified workflow, while keeping a fully automated sample preparation and an analysis free of manual solvent handling throughout the entire process. The complete analysis takes 30 minutes including dissolution.
The IR detection is highly stable, contributing to the overall reliability of the instrument. The IR detector also provides simultaneous chemical composition information, which is key for controlling the production of heterogeneous resins.
The instrument can also measure intrinsic viscosity by means of a built-in dual-capillary viscometer that can be incorporated as an additional feature.
Important applications for GPC-QC are: - Pilot plants.
- Plant start-ups.
- Monitoring grade changes in multi-reactor processes.
- Monitoring the microstructure of pipe resins.
- Processors’ laboratories.
Features - Full automation of the entire analytical process.
- One sample analyzed in 30 minutes including dissolution.
- IR4 or IR5 MCT detectors for Concentration and Short Chain Branching information.
- Optional incorporation of a dual-capillary viscometer.
- Simple and reliable design for Quality Control environments.
- Comprehensive results (MMD, SCB, IVD).
- Outstanding precision thanks to the full automation and the detectors’ robustness.
... Read More | The Two-Dimensional Solvent Gradient Interaction Chromatograph (SGIC 2D) instrument is the only high temperature SGIC equipment commercially available. The system performs an analytical fractionation of the polymer according to chemical composition by selective adsorption/desorption on a HPLC columnThe Two-Dimensional Solvent Gradient Interaction Chromatograph (SGIC 2D) instrument is the only high temperature SGIC equipment commercially available. The system performs an analytical fractionation of the polymer according to chemical composition by selective adsorption/desorption on a HPLC column, followed by a second separation according to molar mass on a GPC/SEC column.
The instrument is fully automated and the whole process is controlled by the virtual instrumentation software. The detection is done by a standard infrared detector at the exit of the GPC/SEC columns, which provides a linear response and an outstanding stability, overcoming the limitations in detection found in single dimension SGIC due to the varying mobile phase composition (using TCB as second solvent).
At the end of the analysis, the two-dimensional distribution interrelating molar mass and chemical composition is obtained. This combined information is often required for comprehensive characterization of complex materials. The SGIC 2D is especially suitable for the analysis of samples of low crystallinity or complex polarity distribution, when the classic cross-fractionation technique based on crystallization (TREF-GPC) does not provide the desired separation.
The composition molar mass interdependence is measured in hours instead of days, with limited solvent consumption and no manual intervention, in an intrinsically safe set-up.
Features - Fully automated instrument to measure the chemical composition – molar mass interdependence of complex and functional Polyolefins.
- Of special interest for polar or low crystallinity Polyolefins.
- Detection performed in TCB and in isocratic mode: a linear IR detector can be used instead of a non-linear ELSD. Compatible with molar-mass
- -sensitive detectors.
- No solvents handling, fully automated process, including in-line filtration.
- Flexible definition of the number of fractions and the solvent gradient profile.
- Bivariate distribution results presented as contour or 3D surface graphs.
- Automated analysis of a sequence of samples, with flexibility to use different methods for each one.
... Read More |
| Quantity | EA | EA | EA |
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