TREF Analytical Services




Temperature Rising Elution Fractionation (TREF) is a well-known technique for the characterization of the Chemical Composition Distribution CCD in Polyolefins and Polymer Char’s Temperature Rising Elution Fractionation (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 also used in some of 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 your cost, please use the base amount (‘Standard’ in this case) and then add the corresponding amount as per any additional detectors or services you want to be used. Anything below 30ºC is considered "subambient".

TREF (Price/Sample)First SampleAdditional Samples
Additional Services:
Carbon Black178€178€
Crystallyzation 0.1ºC room temperature132€110€
Crystallyzation <0.1ºC room temperature171€143€
Crystallication 0.1ºC subambient351€295€
Crystallization <0.1ºC subambient457€383€
Additional Detectors:
Calibration in Comonomer Content186€0€
Calibration for IR5 Composition186€0€
Calibration for Viscometer109€0€
Minimum sample amount>1 g

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.

The standard response time is 3 weeks. This time is approximate and depends on the analysis queue in the laboratory at the time of the order. Polymer Char will inform the customer at the time of the order in case the response time is expected to be longer.

Urgent services (results sent within 10 days from the samples receipt) might be requested with a 50% surcharge. Please consult with Polymer Char the availability of this service and delivery time at the time of the order.

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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