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Plate count of aerobic mesophilic microorganisms in powdered milk products

[Recuento en placa de microorganismos mesófilos aerobios en productos lácteos en polvo]

EPTIS factsheet 521572 | Last revision 2023-07-25 | URL: https://www.eptis.bam.de/pts521572 https://www.eptis.bam.de/pts521572

PT provider
PT provider LACM/División de Metrología LACM/División de Metrología
Based in Chile
Language(s) Spanish
Remarks The PT objectives are: - To assess the performance of laboratories that perform plate count of mesophilic aerobic bacteria in dairy products by comparing their results with the robust consensus average of all participants and setting as the standard deviation for the evaluation the best perception that it can be obtained from tests published in the scientific literature, protocols, interlaboratory tests and results of the proficiency tests carried out by LACM® / Metrology Division in recent years. - The performance will be evaluated through the use of samples of powdered milk products naturally contaminated, which will allow the participating laboratories to evaluate their performance under the same analysis conditions as the routine ones. - The proficiency test is intended for plate counting methods supported by widely used standards that explicitly mention powdered milk products as a matrix. In the case of the Petrifilm method and the NCh 2045 standard, it should be suggested that the incubation time be 72 hours. https://lacm-icytal.uach.cl/metrologia/ Accreditation number: PEA-ENS-14
Product groups Agriculture
Food and drink
Testing fields Microbiology
Technical details
Test item Tested property Testing method
Powdered milk product Aerobic Plate Count ISO 4833-1:2013
ISO 4833-2:2013
FDA/BAM Aerobic plate count (at 32°C by 72 h)
PRT-712.02-023 (ISPCH) (at 32°C by 72 h)
NCh 2045.Of1998 (at 32°C by 72 h)
Petrifilm (AOAC Method 989.10)
Equivalent method
Aims of the PT scheme
Target group of participants Laboratories that performing microbiological analysis
Linked to specific legislation / standards
Additional, subsidiary aims
Number of participants 8 to 12
Accredited or otherwise reviewed by a 3rd party

Accredited by Entidad Mexicana de Acreditación, EMA acreditación N°PEA-ENS-14 on the basis of ISO 17043:2010


Operation is commissioned / requested by No
Fees and frequency
Participation fee Please contact us for this information
Regularly operated Yes (Annual)
Year of first operation 2007
Contact details of the PT provider
Provider Contact person
LACM/División de Metrología
Universidad Austral de Chile, Campus Isla Teja S/N, Valdivia, Chile

Phone: 56-63-2221247
Fax: 56-63-2221245
Mrs Susan Poo
Phone: 56-63-2221247
Fax: 56-63-2221245
Email: susan.poo@uach.cl susan.poo@uach.cl
If you find any mistakes please contact the responsible EPTIS coordinator in Chile, Mr. Manuel Navarrete Rossel. Mr. Manuel Navarrete Rossel.
Any questions or problems? Please contact us at eptis@bam.de.
Application version: 1.23-SNAPSHOT.20230502124635-7925ae379a631fc1ececff45d2921c8db38877d5