On dried whey - 2023

Proficiency testing

Home Proficiency testing Physico-chemistry - On dried whey - 2023

Introduction

The proficiency testings and criteria marked with an are covered by the « accréditation n° 1-2473, comparaisons interlaboratoires, portée disponible sur www.cofrac.fr »/« n° 1-2473 accreditation, interlaboratory comparisons, scope available on www.cofrac.fr », and detailed flexible scope available there

 

We propose tests for the enumeration of Listeria monocytogenes in milk and cheese which must not be mistaken for tests for detection of Listeria.

The tests for the detection of Salmonella do not concern Salmonella Typhi and Paratyphi.

The enumeration of sulphite-reducing anaerobes, Clostridium perfringens and Bacillus cereus concerns non-spore-forming bacteria. The analysis must be carried out without heat treatment.

We draw your attention to the fact that we don't contaminate our samples with collection strains but with strains isolated from dairy food matrices. Therefore, it is possible that some of them present unexpected phenotypic characteristics on some culture media.

 

The fat content of the cheese to be analyzed is less than 20%


Methods / Analytes

moisture determined using any method, fat determined using the butyrometric and gravimetric method, nitrogen determined using the Kjeldahl method, lactose determined using any method


Number of samples

6 samples with varying amounts of:

- moisture: 1 to 5 g/100 g

- fat: 0.5 to 2.5 g/100 g

- nitrogen: 1.5 to 5 g/100 g

- lactose: 60 to 85 g/100 g


Packaging

in 50 g vacuum aluminium bags


Preservation

storage at 3 (± 2) °C, with a bact eriostatic mixture preventing any bacterial growth in the milk, but rendered inactive upon dilution


Dispatch

in insulated box without ice packs by express carrier


Storage in the laboratory

at room temperature


Validity of the samples

testing must be carried out within 7 days after the date of dispatch


Special conditions

International delivery by international carrier :

- In Europe: shipping time: 1 to 3 days depending on the consignee’s country and town

- Intercontinental delivery: shipping time is 1 to 4 days depending on the consignee’s country and town, and time before dispatch may take up to 7 days, the time necessary to obtain customs documents

On condition for the dispatch to certain destinations, please contact us concerning this point.


Calendar of dispatch :

 

Sample dispatch 2023/02/20 2023/11/20
Return of results to ACTALIA Cecalait 2023/03/02 2023/11/30

Subscription at least 10 days before each dispatch

Rates

Members Non-members
Registration fees per shipment 63.57 € 95.31 €
Participation fee per tested method 63.57 € 95.31 €


Special conditions :

  • For groups from 10 to 24 participating laboratories: 10 % discount,
  • For groups from 25 participating laboratories: 15 % discount

Payment conditions :

within 1 month of receiving invoice

Formulas

  • Moisture
  • Fat
  • Nitrogen
  • Lactose




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Contact us

ACTALIA Cecalait

Rue de Versailles
BP 70129
39801 POLIGNY CEDEX
FRANCE

Tel : +33 (0)3 84 73 63 20
Fax : +33 (0)3 84 73 63 29

cecalait[at]actalia.eu

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