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.

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.

Microbiology

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 / polymers, elastomers / rubber, composite materials and pipes
• Metals
• Textiles and leather
• Building materials
• Coatings such as painting and electroplating (galvanization)
• Vibration / Shock and Electromagnetic compatibility (EMC)

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.