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Regular participation in Proficiency tests and the continuous use of reference materials
are essential instruments for quality assurance in every testing laboratory.

Successful participation in "a suitable program for comparing measurements between laboratories" is required by state institutions, associations and customers as part of the approval process, and at the same time acts as a proof of competence that accredited testing laboratories 

must provide regularly in accordance with ISO/IEC 17025. This is essential likewise for the quality assurance of all other laboratories.

While the use of reference materials provides an internal control over routine analyses, participation in Proficiency tests provides an external control, i.e. an objective evaluation by a competent third party.

Anita Schott

We are a Proficiency test provider accredited by the German Accreditation Body (Deutsche Akkreditierungsstelle - DAkkS) according to DIN EN ISO/IEC 17043:2010-05. For over 30 years we have been conducting proficiency tests relating to dairy and food with over 500 participants from more than 40 nations – each and every year!

Dr. Anna Fichtner
Head of PT / RM

Independent of the internal performance evaluation, proficiency tests serve:

  • in the comparison to other laboratories worldwide
  • in the comparison of different methods, by comparing actual detected measurement results
  • in the detection of systematic and random errors in analyses, allowing corrective actions to be taken
  • in the verification of the analytical capabilities of personnel and equipment
  • in the calculation of your own degree of measurement uncertainty, or in providing a plausible cross-check to your existing estimation
  • in the documentation, compliant to standards, of your own competence

The comprehensive range of chemical-physical, microbiological and sensory Proficiency tests in a tabular overview as well as all details on the construction and procedure of a test, can be found in our current program or directly in our customer portal.

By using the customer portal, you can quickly and easily register for individual Proficiency tests or subscribe to multiple proficiency tests. They can be viewed online, paper free, at any time. If you do not yet have an account, you can create one proceeding under‘Step-by-step instructions.‘‘

Sign up and discover the right proficiency test for you!

Here are just some of the advantages that we bring:

  • We evaluate the data ourselves.  You can contact us directly if you have any questions.
  • If you have technical questions regarding analytics, the knowledge of all our specialists in multiple related fields is available to you as well.
  • The ability to obtain performance histories for desired parameters and materials.
  • If you submit three or more test results, we will calculate the degree of measurement uncertainty for you.
  • Benefit from the promotional offers specified in the program

In between Proficiency testings, use the corresponding reference material to aid your quality assurance, e.g. for creating your own quality control chart.

Proficiency tests January:

Chemical/physical proficiency testing

  • EPQS 1033 Veterinary pharmaceuticals in milk (quantitative)
  • EPQS 1040 UHT Milk
  • EPQS 1043 Butter
  • EPQS 1044 Alkaline Phosphatase in Milk
  • EPQS 1045 Raw Milk 

Sensory suitability test

  • EPQS 1042 Sensory According to ISO 22935 "Milk"
Proficiency tests February:

Chemical/physical proficiency testing

  • EPQS 1041 Cheese
  • EPQS 1046 Low-lactose and lactose-free Milk 
  • EPQS 1047 Cream 
  • EPQS 1049 Vegan Drink

Microbiological suitability tests

  • EPQS 1050 Total Microbial Count in Milk
  • EPQS 1051 E. coli, Enterobacteriaceae, Coliforms in Milk
  • EPQS 1052 Yeasts, Geotrichum in Milk

Sensory suitability test

  • EPQS 1048 Ranking of Odour
Proficiency tests March:

Chemical/physical proficiency testing

  • EPQS 1053 Yoghurt
  • EPQS 1055 Processed Cheese
  • EPQS 1056 Milk Powder
  • EPQS 1072 Fatty acid Distributation in raw milk

Sensory proficiency testing

  • EPQS 1054 Sensory According to ISO 22935 “Powder”
  • EPQS 1057 Profile Testing

Contact persons

Dr. Anna Fichtner

Head of dept. proficiency testing / reference materials

Tel. +49 (0) 831/5290-274

Anita Schott

Deputy head of department proficiency testing /
reference materials

Tel. +49 (0) 831/5290-231