Interlaboratory comparison

Interlaboratory comparison

Since 2007, we have been preparing samples for interlaboratory comparison tests focused on the chemical and microbiological analysis of milk and dairy products. The aim is to ensure the comparison of results between individual laboratories, verify the correct use of methods, and identify possible deviations, which contributes to quality assurance.

Scope of interlaboratory comparison

Analysis

Sample

Determination

Chemical

SET A – raw milk

(2 different samples)

  • fat
  • dry matter
  • protein
  • lactose

SET B – skimmed milk

(2 different samples)

  • fat
  • dry matter

SET C – cream

(2 different samples)

  • fat
  • dry matter

Physical

set of 10 samples

(6 salt solutions and 4 milk samples)

  • freezing point by milk cryoscope

Microbiological

milk
quantitative determination of microorganisms

  • total number of microorganisms
  • coliform bacteria
  • Escherichia coli
  • Enterobacteriaceae family
  • yeast

fermented milk product
quantitative determination of microorganisms

  • yogurt bacteria
  • bifidobacteria

 

Each laboratory will receive an individual report with an anonymous comparison of results.

Deadlines for Round XX

  • application deadline: March 10th, 2025
  • sample distribution: March 17th, 2025
  • delivery of results by laboratories: April 4th, 2025
  • binding deadline for sending test evaluations: May 9th, 2025

Online form for completing microbiological analyses here.