TestQual is a Spanish company specialised in quality assurance for laboratory research. For fifteen years we have been organising, distributing and reporting chemical proficiency studies. These proficiency studies compare the results from laboratories all over the world, so each laboratory can measure its analytical proficiency and test the quality of its analyses.


TestQual also produces reference materials, always certificated, tested and guaranteed for homogeneity and stability. These materials are used to check the quality of analyses.

Latest News

  • TestQual 102: Shippment
    TestQual 102: Shippment

    The deadline to send applications for the proficiency test: TestQual 102 Chlorate and Perchlorate in Spinach has been met. The shipment of the sample is scheduled next Tuesday 24th.

    Upon arrival of the sample check the package and the sample and let us know if you detect any problem with it (unfrozen, broken package, etc)



  • TestQual 108: Acrylamide
    TestQual 108: Acrylamide

    After the entry into force of the new EU Regulation about Acrylamide benchmark levels, all eyes are focusing on this parameter.

    Is your laboratory already accredited in Acrylamide? Are you preparing a method for it?

    TestQual has organized a proficiency test of Acrylamide in Fried...

  • TestQual 100: Results turn in.
    TestQual 100: Results turn in.

    The samples for the proficiency test: TestQual 100 has been sent. The deadline to send your results is 27th of July

    If you have any problem upon the arrival of the sample you can contact us by email, phone, your client area or the Contact tab of our website.

    +34 676367555 or  +34 868949486

  • TestQual 97 Final report
    TestQual 97 Final report

    The aflatoxins in paprika proficiency test have ended. The final report will be emitted in July. 

    If you have any doubt you can contact us through:


  • Check out the 2018 schedule.
    Check out the 2018 schedule.

    Now you can find TestQual's new schedule for 2018 here:

     2018 Calendar

    Or you can download it as pdf:  By clicking...

  • SANTE/11813/2017

    Document No. SANTE 11813/2017 (Implemented by 01.01.2018)

    Method Validation and Quality Control Procedures for Pesticide Residues Analysis in Food and Feed. DOWNLOAD HERE