Analytical Services

Plastic materials are becoming more complex as new resins are designed to optimize their performance in specific applications.
Some common parameters used to measure performance, such as melt index and density, only show partial information of the resin’s microstructure, and other features exist that explain polymer performance. Separating the polymer according to certain parameters like molar mass, branching, or stereoregularity, and studying its microstructure, will help uncover the reasons why some plastics behave differently to others.

In Polymer Char we offer a wide range of analytical services for polyolefin samples and other polymers. Over 25 years of expertise in the polyolefin field, and the most advanced instrumentation for microstructural characterization, have made Polymer Char’s laboratory a global reference in polyolefin analysis.

Below you will find all the techniques that we cover. If you need help to decide which one is the most appropriate for your type of samples, you can get in contact with us by filling out our form.

GPC (Molar Mass) Analysis

Size-Exclusion Chromatography (SEC), also known as Gel Permeation Chromatography (GPC), is a liquid chromatography technique that separates molecules according to their size. Polymer Char performs GPC/SEC analyses for polyolefins by using its own high-temperature instruments, GPC-IR and GPC-QC.

Chemical Composition Distribution Analysis

The CCD technique separates the molecules based on their crystallizability. Most polyolefin products are produced incorporating comonomers to reduce crystallinity and extend the range of product performance. To define these copolymers, the chemical composition or comonomer incorporation parameter is required in addition to the molar mass distribution.

Bivariate Distribution Analysis

The combination of GPC and TREF or TGIC techniques is a powerful approach to obtain a complete characterization of complex resins.
The two-dimensional distribution achieved with cross-fractionation techniques reveals the interdependence between molar mass and chemical composition in polyolefins. This information is necessary in some complex samples designed through multiple reactor–catalyst processes.

Preparative Fractionation Analysis

Preparative fractionation of polymers is a technique that separates the polymer by its molar mass or chemical composition and provides the physical fractions. These fractions can be analyzed afterwards by other techniques such as TREF, CRYSTAF, GPC, NMR, or DSC to study the interdependence between different microstructure parameters. Different separation techniques by chemical composition are available.

Soluble Fraction Analysis

The Soluble Fraction test measures the amorphous fraction of polypropylene and ethylene-propylene copolymers, which has a significant influence on the polymer properties.
The data provided by the Soluble Fraction test is equivalent to the Xylene Solubles results obtained with the gravimetric method.

Intrinsic Viscosity Analysis

This service provides the intrinsic viscosity of any polymeric material, even of the most challenging ones such as high and ultrahigh molar mass polymers.
The analysis is performed in Polymer Char’s Intrinsic Viscosity Analyzer (IVA), and the results are equivalent to those provided by traditional glass capillaries of the Ubbelohde type.

Analytical Service Terms & Conditions

Minimum Sample Amount

AnalysisMinimum Required
GPC-IR>0.1 g
GPC-QC>1 g
CEF>1 g
TGIC>1 g
TREF>1 g
CFC>2 g
CRYSTEX 42>1 g
IVA>0.5 g
Fractionation by TREF>5 g resulting amount per fraction desired
Fractionation by CRYSTAF>5 g resulting amount per fraction desired
Fractionation by Molar Mass>5 g resulting amount per fraction desired

1. Minimum Sample Amount

A minimum sample amount will be required depending on the analytical service ordered. Please refer to the table above.


2. Solvents

Samples for routine analysis or fractionation services require being soluble via one or the two following solvents:
  • TCB.
  • oDCB.
Please consult Polymer Char Analytical Services team for more options.


3. Order Procedure

To order an analytical service, go to the webpage of the analytical service you wish to order. Scroll down until you find the Oder Form to fill out and send. You will be contacted to continue with the process of your sample. You can also contact us at to ask for a quotation.


4. Mailing Address

Samples should be shipped to:

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


5. Transport Responsibilities and Taxes

Sample delivery to our laboratories can be done by mail or courier at Client’s expenses. It is the Client’s responsibility to follow any safety rules concerning transportation. As per being samples with non-commercial value, import taxes should not be applicable. Therefore, Client will be responsible for assuming any import tax required if a significant sample value has been set in the shipping document.


6. Pricing Policy

Current prices are subject to change without notice. All standard services fees can be found at this website, in the “Fees” page of each corresponding technique. Please note that these prices are the same for every Client worldwide and are not negotiable.
Exceptionally, based on Polymer Char Price Policy, Public Universities and Non-Profit Research Institutes are granted with a 15% discount.


7. Response Time

Standard response time is 3 weeks (for fractionation services, this is the response time per sample to be fractionated). This time is approximate and depends on the analysis’ queue in the laboratory at the time of the order and the number of samples to be analyzed. Polymer Char will inform the Client at the time of the order in case the response time is expected to be longer. Priority services (results sent within 10 days from the receipt of the samples) might be ordered with a 50% surcharge. Please consult us the availability of this service and delivery time at the time of the order.


8. Sample Results format

Sample results will be sent by email as standard practice.


9. Results Internal Store

Sample results will remain stored in Polymer Char server for 5 years.


10. Sample’s Delivery back to Client’s place

Unless otherwise requested, samples will be retained for 2 years.
Samples can be returned at the client’s expense by providing courier account.


11. Best Laboratory Practices, Samples’ Liability and Lawsuits

Results sent are based on our best corporate analytical procedures within the scope of generally accepted methods in the field of expertise and they are all performed with proper care and responsible approach. Polymer Char will be willing to duplicate or to do the necessary work to corroborate the results. However, it accepts no liability for the information supplied.

Regarding lawsuits, Polymer Char has the responsibility to avoid any conflict of interest that may result in its participation, therefore:

  • Polymer Char will not be responsible for the use made on the analytical services reports provided.
  • Polymer Char will not get involved in any lawsuit process related to the analysis information provided, beyond carrying out the analytical services requested under its best practices methodology.


12. Demonstration Samples

Polymer Char is glad to run demonstration samples if you are interested in acquiring an instrument and would like to test the results. The maximum number of samples run free of charge for CFC and Fractionation services is one. For all other instruments, the maximum is two samples.


13. Privacy Policy

Polymer Characterization, S.A. is committed to respecting and protecting your privacy and the personal data that you may provide to Polymer Characterization, S.A. Polymer Characterization, S.A. acts in full compliance with the Spanish Law Ley Orgánica 15/1999, de 13 de diciembre, de Protección de Datos de Carácter Personal (the Law on the Protection of Personal Data). Therefore, in case you access parts of the website where you can provide personal data (e.g. Contact Form or Press Mailing List) your personal data will be processed and kept in strict accordance with the relevant legislation. You can exercise your rights of access, correction, cancellation of opposition by writing to Polymer Characterization, S.A. to or to 8 Gustave Eiffel Str., Paterna, E-46980 Valencia, Spain.

This Privacy Policy affects as well to the Customers’ Samples’ Analysis’ results. If a Privacy Agreement is required by the Customer, please contact us.

For more information please contact us at

Request an Analytical Service

Thank you for your interest. If you would like more information about any of our analytical services, please fill out the form below.

* Required fields