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EPTIS factsheet 153265 | Last revision 2023-11-07 | URL: https://www.eptis.bam.de/pts153265 https://www.eptis.bam.de/pts153265

PT provider
PT provider DRRR - Deutsches Referenzbüro für Ringversuche und Referenzmaterialien GmbH DRRR - Deutsches Referenzbüro für Ringversuche und Referenzmaterialien GmbH
Based in Germany
Language(s) German/English
Remarks Lactose free products need to have a lactose content < 0.1% lactose. To verify that one can determine lactose contents < 0.1 % is the scope of this proficiency testing. This proficiency testing scheme covers the value-assessing parameters in raw cream which are of great importance for dairy plants, veterinary and customs inspection service as well as for all food testing laboratories which cover the chemical raw cream testing in the scope of its test program. The microorganism E.coli is part of the intestinal microflora of humans and warm-blooded animals. Furthermore E.coli is used as an indicator organism for faecal pollution and hygienic parameter a lot of different foodstuff like milk products or meat products. Therefore we developed and established the present proficiency testing scheme. Representatives of the family Enterobacteriaceae can occur in the intestine of humans and animals but also in raw foodstuffs. In heated products there should be no Enterobacteriaceae. Therefore Enterobacteriaceae serve as hygienic parameter for the production process of a lot of foodstuffs like milk products or meat products and others. This PT scheme was developed and established because some pathogenic species can additionally cause diarrheal disease. Residential livestock like poultry or cattle can possibly be a reservoir for thermophilic Campylobacter species without any symptoms of illness. Therefore foodstuffs of animal origin (poultry, raw milk fish and seafood) are potentially contaminated. A contamination of these foodstuffs with Campylobacter can possibly cause diarrheal disease. Aerobic spore-forming bacteria usually occur in soil but also in meat, milk or herbal foodstuffs and can lead to taste changes and spoilage. These bacteria are able to survive the pasteurisation step using their heat-stable spore-form. Some of their pathogen representatives produce enterotoxins causing regurgitation or diarrhoea.
Product groups Food and drink
Testing fields Analytical chemistry
Sensory testing
Technical details
Test item Tested property Testing method
UHT milk (lactose free) Lactose (< 0.1 %) -
Raw milk frozen NPN -
Total lactic acid -
pH value -
Lactose -
Fat -
Dry matter -
Protein -
Freezing point -
Urea -
Casein -
Pesticides -
Goats's milk Fat -
Protein -
Freezing point -
Raw cream frozen Fat -
Dry matter -
Protein -
Sour cream, crème fraiche pH value -
Fat -
Dry matter -
Protein -
Evaporated milk Ash -
Fat -
Dry matter -
Protein -
Phosphorus -
UHT milk Lactose -
Fat -
Dry matter -
Protein -
Freezing point -
Density -
Milk frozen E.coli -
Campylobacter -
Enterobacteriaceae -
Aerobe spores -
Psychrotrophic bacteria -
EHEC O157 -
EHEC O104 -
EHEC Screening -
Total count -
Yeasts -
Geotrichum spp -
Milk (residues) PCB 101 -
Chloramphenicol -
Aldrin -
Dieldrin -
Trichlormethane -
Aflatoxin M1 -
Streptomycine -
Tetracycline -
Buttermilk Phosphatides -
Milk Triangle test, flavour taint -
Dairy drinks Fat -
Dry matter -
Protein -
Sucrose -
Glucose -
Lactose -
Milk ANTIBIOTICS Sulfonamides
Aims of the PT scheme
Target group of participants all laboratories
Linked to specific legislation / standards
Additional, subsidiary aims validation of testing methods
Number of participants depending on test methods between 8 - 50 laboratoties
Accredited or otherwise reviewed by a 3rd party

Accredited by A2LA (USA) and DAkkS (Germany) on the basis of ISO/IEC 17043 for part of the parameters

Operation is commissioned / requested by
Fees and frequency
Participation fee 169 - 310 Euro, depending on sample and parameters
Regularly operated Yes (several times p.a., dep. on sample and parameters)
Year of first operation 2007, 2016, 2017, 2020, 2023, 2024
Contact details of the PT provider
Provider Contact person
DRRR - Deutsches Referenzbüro für Ringversuche und Referenzmaterialien GmbH
Reinhartser Straße 31
87437 Kempten

Phone: +49 (0) 831/960 8780
Fax: +49 (0) 831/960 87899
Web: http://www.drrr.de http://www.drrr.de
Dr. Ulrich Leist
Phone: +49 (0) 831/960 87878
Fax: +49 (0) 831/960 87899
Email: info@drrr.de info@drrr.de
If you find any mistakes please contact the responsible EPTIS coordinator in Germany, Mr Johannes van de Kreeke. Mr Johannes van de Kreeke.
Any questions or problems? Please contact us at eptis@bam.de.
Application version: 1.23-SNAPSHOT.20230502124635-7925ae379a631fc1ececff45d2921c8db38877d5