GPC/SEC Analytical Services



Polymer Char laboratory specializes in the microstructural characterization of polyolefins. Our extensive knowledge and expertise are helping companies worldwide deepen their understanding in their polyolefin products.

For Gel Permeation Chromatography (GPC) or Size Exclusion Chromatography (SEC) analyses we use GPC-IR and GPC-QC instruments. Both GPC systems are optimized for the analysis of polyolefins, and their Infrared detectors, IR4 , IR5 , and IR6 can measure the Molecular Weight Distribution and the Chemical Composition Distribution (SCB) of the sample.

Viscometer and Multi-angle Light Scattering (MALS) detectors can be added to provide Intrinsic Viscosity, Long-chain Branching (LCB), and Absolute Molar Mass results.

GPC/SEC analyses are particularly useful for bimodal HDPE, LDPE, EP copolymers, and Ultra High Molecular Weight polymers, especially when combined with SCB and LCB information because of the extra dimension that these results provide.

GPC/SEC Detectors

These are the detectors that can be used in our GPC/SEC tests:



The IR5 detector is capable of measuring the concentration and the chemical composition of the sample. When analyzing HDPE pipe resins, high sensitivity is required to accurately measure the low number of branches that they contain. IR5 MCT detector was designed for this specific purpose and it is very powerful when characterizing this kind of resins.



The IR6 Detector is the latest Infrared Detector developed by Polymer Char. It has the same capabilities and features as the IR5 detector, but it is also capable of measuring carbonyls group in the band of 1740 cm-1. IR6 Detector is recommended for users that want to analyze polyolefins type EVA, EBA, and others with carbonyls group present in the abovementioned IR band.

Light Scattering

Light Scattering

A Light Scattering detector connected to a GPC Instrument makes it possible to determine the absolute Molar Mass without calibrating the GPC columns.
Coupling a concentration detector to a light scattering detector is a way to generate Conformations plots (dependence of radius of gyration on molar mass), a direct method for detection and characterization of long chain branching.



By connecting a capillary Viscometer to a high-temperature GPC when analyzing polyolefins, the bulk Intrinsic Viscosity (IV) can be determined. The IV is provided as a function of Molar Mass (MM), and then the Universal Calibration (UC) is applied, for samples with different molecular structures.
Coupling a concentration detector to an online viscometer is a way to generate Mark-Houwink plots, which relates intrinsic viscosity with molar mass, a method for long chain branching characterization.

GPC/SEC Analysis Reports

GPC-IR 3D Report (IR5)

GPC-IR Viscosity Report (IR5)

GPC-IR Report Overlay (IR5)

GPC-QC Report Overlay (IR5)

GPC-QC Report Overlay (IR5)

17 replicates

GPC/SEC Analytical Service Fees

To calculate the final price, please use the Standard fee as a base, and then add the corresponding fee for each additional result that you need.

GPC/SEC (Price/Sample)First SampleAdditional Samples
Additional Results:
Short Chain Branching (IR5 or IR6)509€352€
Intrinsic Viscosity331€240€
Absolute Molar Mass (LS)454€330€
Carbonyls Content (IR6)509€352€
Additional Services:
Sample Filtration178€178€
Minimum sample amount>0.1 g

Analytical Services Frequently Asked Questions

No, this is an analytical GPC/SEC service, not a fractionation service.
We offer preparative fractionation services to fractionate samples by molecular weight or by chemical composition (TREF or CRYSTAF). For more information, please visit the links below:

For most of our characterization techniques, you will receive a report containing the analytical conditions used, the calibrations applied, and a summary table with the results, along with an Excel file containing the raw data. However, the type of data and report depend on the type of analytical service. For specifics about the contents of the analysis report, please contact

Please send an email to and we will be pleased to help you.

You can order our analytical services by sending us an email to or via our Contact Form, stating:
· Number of samples
· Type of sample
· Technique required
· Detectors / additional results needed

Please send your samples to the following address:

Polymer Characterization S.A.
Valencia Technology Park
Gustave Eiffel 8
Paterna, Valencia
E-46980, Spain
Attn.: Analytical Services Department

We highly recommend to use a courier service instead of post mail, to make sure that your samples arrive soon and in good condition.

Our standard analysis turnaround is 3 weeks. This time is approximate and it depends on the analysis queue in our laboratory at the time of the order. We will inform you in case the response time is expected to be longer.

Urgent services (10-day turnaround) can be requested with a 50% surcharge. Please confirm with us the availability of this service and delivery time before placing the order.

In our Analytical Services Terms you will find the necessary amount for each technique.

Polymer Characterization, S.A. is committed to respecting and protecting the data that you provide to us. Polymer Characterization, S.A. acts in full compliance with the EU General Data Protection Regulation 2016/679 (GDPR). All your personal data will be processed and kept in strict accordance with the relevant legislation.
Strict privacy also applies to the analytical results. If a Privacy Agreement is needed in order to hire our analytical services, please inform us.

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