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
- fat determined using the Gerber method♦: 10 samples with fat varying from 15 to 49 g/l
- fat determined using the Röse-Gottlieb method♦: 10 samples with fat varying from 14.5 to 48g/kg
- true protein determined using the Amido Black method♦: 10 samples with protein varying from 24 to 37g/l
- total and non-protein nitrogen♦ determined using the Kjeldahl or any other method:
- Total nitrogen : 10 samples with nitrogen varying from 3.5 to 6.5 g N/l
- Non-protein nitrogen: 3 samples of milk (NPN about 0.2 to 0.3 g N/l)
- 1 tryptophan solution
- 1 glycine solution in which the nitrogen concentration is equivalent to that of milk
- 1 tryptophan solution
- 1 ammonium sulphate solution
The nitrogen concentration of the solutions is equivalent to that of milk
- non-casein nitrogen determined using the Kjeldahl or any other method: 5 samples with casein varying from 0.7 to 1.2 g N/l
- lactose♦ determined using the enzymatic method (or any other method): 10 samples with lactose varying from 4.6 to 5.1 % + 1 lactose solution at a concentration equivalent to that of milk
- freezing point determined using the cryoscopic method♦: 10 samples with freezing point varying from -0.550 to -0.480 °C + 2 standard NaCl solutions for calibration
- dry matter♦ (any method): 10 samples with dry matter varying from 10 to 15 %
- urea♦ (any method except infrared): 10 samples with urea varying from 100 to 700 mg/l
- somatic cells♦ for all methods used: 10 samples containing between 50 000 and 1 600 000 cells/ml + 1 control sample
-1 set of 10 samples which are the same for the Gerber and Amido Black methods
-1 set of 10 samples which are the same for the Kjeldahl and Röse-Gottlieb methods
-1 set of 5 samples specific to the determination of casein
-1 set of 10 samples which are the same for the determination of dry matter and lactose, as well as cryoscopic measurements.
-1 set of 10 samples specific to the determination of urea
-1 set of 10 samples specific to the determination of somatic cells + 1 control sample
in 30 ml screw-capped vials with airtight seals
addition of Bronopol to the samples (final concentration: 0.02 %)
in insulated box with ice packs by express carrier (see regulation for shipping times)
at 4 (± 2) °C
testing must be carried out within 7 days after the date of dispatch
| Sample dispatch | 2024/03/04 | 2024/06/03 | 2024/09/02 | 2024/12/02 |
| Return of results to ACTALIA Cecalait | 2024/03/18 | 2024/06/17 | 2024/09/16 | 2024/12/16 |
Subscription at least 10 days before each dispatch
| Members | Non-members | |
|---|---|---|
| Registration fees per shipment | 68.13 € | 101.82 € |
| Participation fee per tested method | 68.13 € | 101.82 € |
| Total nitrogen + NPN (Supplement) | 13.48 € | 20.22 € |
within 1 month of receiving invoice
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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
Accreditation no 1-5577, tests, no 1-2473 interlaboratory comparisons, scope available on www.cofrac.fr/en
