Phone: +49 (0) 831 960878-0
Modern and clean testing laboratory for proficiency testing

Proficiency testing and certified reference material

Our NEW CATALOGUES FOR 2021/2022 are now available! Just take a look and browse the catalogue online.
We offer laboratories from the processing industry as well as official and private laboratories all aspects of quality assurance from one single source. Our focus is on food, consumer goods, packaging, building materials, plastics (polymers) and textiles, as well as microbiological analysis in these categories.

Proficiency Testing

Accredited (ISO/IEC 17043) and online performed proficiency testing schemes with samples of practical relevance.

Reference Materials

High quality reference material: Characterized in a proficiency test and tailored to the needs of our customers.

Further Service

Customized monitoring programs, QM consulting including assessment and auditing, as well as seminars and training.

We are your provider for proficiency testing and reference material

The "Deutsches Referenzbüro für Ringversuche und Referenzmaterialien" (DRRR GmbH) is an ISO/IEC 17043 accredited proficiency testing provider and provider of certified reference material. As a leading service company for external quality assurance, we are internationally operating and offer all aspects of quality assurance from one single source.

For more than 15 years, the DRRR has been offering services in the field of quality assurance. With more than 500 proficiency tests performed per year, the DRRR is one of the largest providers worldwide. In addition to these many years of experience, you also benefit from our high level of competence in the field of statistics combined with technical expertise.

Our proficiency tests are characterized by the following features:

  • Accredited according to ISO/IEC 17043

  • Completely digital processes from registration to report

  • Everything from one source: Statistical know-how and technical competence

  • Experienced employees

  • Use of high-quality materials

We offer you numerous certified reference materials, adapted to our proficiency testing programs. In addition, we offer quality consulting as well as trainings for quality assurance in laboratory and production. We also support our customers in questions of analysis (chemical-physical, microbiological, organoleptic) and testing (physical-mechanical), as well as concerning statistical issues. Particularly in the calculation of the measurement uncertainty we can support our customers with many practical examples, e.g. based on testing of reference materials or by participation in proficiency testing rounds.

Food and feed

We offer more than 160 chemical-physical, molecular -biological-immunological and organoleptic proficiency tests. Here is a selection of test matrices:

  • milk and dairy products,
  • drinks,
  • fruit and vegetables,
  • meat and fish,
  • feed.


More than 120 microbiological proficiency tests with all relevant microorganisms are available up to the area of risk group 3** (EHEC). Here is a selection of test matrices:

  • food,
  • consumer goods,
  • water,
  • medical devices,
  • building materials.

Material testing

Choose from over 300 proficiency tests covering a wide range of different materials. Many of our proficiency tests cover the calculation of precision data, which you can then use directly for your laboratory practice. Here is a selection of materials:

  • plastics, elastomers, metals, composite materials and pipes,
  • textiles and leather,
  • building materials,
  • coatings such as painting and electroplating (galvanization).

Consumer goods and packaging

We offer more than 100 chemical-physical and organoleptic proficiency tests. Here is a selection of test matrices:

  • consumer goods in contact with foodstuffs (films, cardboard, paper),
  • consumer goods in physical contact (textiles, leather, jewellery, cosmetics),
  • toys and printing inks,
  • detergent.

medical devices

We currently offer about 20 chemical-physical and microbiological proficiency tests in the field of medical devices in our program.

Our online system (ODIN)


Use our online system (ODIN) to find the right one from more than 700 proficiency tests.

Here you can use the comfortable search function for matrix, parameter, method etc.

Working with ODIN has only advantages for you:

  • quick and easy online booking in our online catalogue

  • overview of your registered proficiency tests

  • fast and safe delivery of results via ODIN

  • permanent access to all your certificates and reports