Chemical Composition Analysis by TREF




Temperature Rising Elution Fractionation (TREF) is a well-known technique for the characterization of the Chemical Composition Distribution CCD in Polyolefins.  Polymer Char’s TREF is the first fully automated analytical Instrument that performs this analysis.

The concentration of the sample is measured by an Infrared (IR) detector, Polymer Char’s IR4, which can also offer information about comonomer content if a composition sensor is added. More information can be obtained by adding a Viscometer detector.

Additional Detectors

These detectors are used in our TREF analyses:

C=O Content by IR4

C=O Content by IR4

A Carbonyls sensitive sensor can be incorporated in the infrared detector to measure the C=O/1000C tendency versus the molar mass distribution. (Depending on instrument availability)



By connecting a capillary Viscometer to a TREF instrument 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.

TREF Analytical Services Fees

To calculate the final price, please use the Standard fee as a base, and then add the corresponding fee for each additional detector or service that you need. Anything below 30ºC is considered "subambient".

TREF (Price/Sample)First SampleAdditional Samples
Additional Detectors:
Chemical Composition (IR5)216€181€
Intrinsic Viscosity216€181€
Molar Mass by Light Scattering475€399€
Calibration for Chemical Composition229€0€
Calibration in Comonomer Content229€0€
Calibration for Intrinsic Viscosity134€0€
Calibration for Molar Mass134€
Additional Services:
Crystallization 0.1ºC room temperature162€136€
Crystallization <0.1ºC room temperature211€176€
Crystallization 0.1ºC subambient432€363€
Crystallization <0.1ºC subambient562€472€
Sample Filtration (carbon black)219€219€
Standard Data Re-processing109€109€
Patent Interpretation300€
Minimum sample amount>1 g

Terms & Conditions

Analytical Services Frequently Asked Questions

The fractionation service is available thanks to the Instruments PREP mc2 and PREP C20, capable of fractionating samples by molecular weight or by composition (TREF or CRYSTAF). Please visit the link Preparative Fractionation for more information.

The resulting fractions are later analyzed by the corresponding technique (GPC or TREF/CRYSTAF) to check the good performance of the fractionation process. Finally, the physical fractions are sent back to the customer by courier service as well as the analysis results of the fractions, so the customer can check the separation.

For most of our analyses, you will receive a summary of the results along with an Excel file. However, the type of data and report form depends on the analytical service made. For specifics about the information sent, contact

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

To order any analytical service, please fill in the Analytical Service Request Form. Provide all the information available about the samples to be analyzed. Sent forms will be processed as formal orders for Polymer Char records. All the information provided is considered confidential information.

If a previous quotation is required, please do not hesitate to let us know by sending an email to

Samples should be shipped to:

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

We highly recommend to use courier service instead of post mail to ensure your samples arrive in good condition.

You will receive the results in less than a week. If you plan to send more than 10 samples, please check with our lab, as the response time may be longer in this case.
This time is approximate, and it depends on the service queue in the laboratory at the time of the order. Polymer Char will inform the customer if the turnaround time is expected to be longer.

Please refer to our Analytical Services Terms and in the first chapter, you will find the necessary amount for each technique.

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 about Polymer Char’s Privacy Policy and Terms of Use please click here.

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