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University of Zagreb
Faculty of Agriculture
Department of Dairy Science
The Reference laboratory
for milk and dairy products

Svetošimunska 25
10000 Zagreb, HR

T. +385 (0)1 239 3942
F. +385 (0)1 239 3988
E. rlm@agr.hr

www.agr.hr
Reference material

Reference material - reference substances intended for quality control of analysis and / or calibration of analytical instruments.

Reference material is prepared in accordance with the requirements of the standard EN ISO 17034 "General requirements for the competence of reference material producers".

One set of milk reference material samples (according to planned delivery schedule) includes 10 different samples for milk fat, protein, lactose and dry matter (basic chemical composition), respectively 5 samples for somatic cell count and 5 samples for freezing point value. We can also provide a separate set of 5 or 10 urea samples in cow's milk and 5 urea samples in goat's and sheep's milk.

The reference material of cheese, cream, yogurt and butter can be ordered in the form of single samples or sets of samples (2 to 5 samples) according to the planned delivery schedule. Samples can also be delivered outside the schedule at customer request.

Reference material can be ordered in the form of an annual order or at least 7 days before scheduled delivery, by sending an order to rlm@agr.hr. The order must include: company name, business address and VAT number, contact person's name, method of delivery/transport (personal pickup or delivery by express mail), DHL number (if delivery is made by express mail).


Handling of reference material


The handling of the reference material must be carried out in accordance with the instructions accompanying the consignment.
Storing of PT samples
• - The samples must be stored according to the instructions (in the refrigerator: 6°C ± 2 ° C or in the freezer: -20 ° ± 2 ° C).

Transport of reference material

Reference material can be taken by users in the RL and transported by hand refrigerators with ice cartridges, or delivered to users by express mail in appropriate packaging (cardboard boxes or styrofoam boxes) with ice cartridges.

 

Delivery schedule of reference material for  2020

 

Cow milk

Goat milk

Sheep milk

15. - 16. January (1)

    -

   -

05. - 06. February (1)

19. - 20. February (2)

   -

04. - 05. March (1)

18. - 19. March (3)

   -

08. - 09. April (1)

22. - 23. April (2)

01. - 02. April (2)

13. - 14. May (1)

20. - 21. May (3)

06. - 07. May (3)

17. - 18. June (1)

09. - 10. June (2)

03. - 04. June (1)

08. - 09.July (1)

15. - 16.July (2)

01. - 02. July (2)

19. - 20. August (1)

12. - 13. August (2)

26. - 27. August (3)

09. - 10. September (1)

16. - 17. September (2)

23. - 24. September (2)

14. - 15. October (1)

21. - 22. October (1)

-   

11. - 12. November (1)

04. - 05. November (2)

-   

09. - 10. December (1)

    -

-   


Pasterised milk

Sterilised milk

Cheese, Cream, Yogut

29. - 30. January (4)

12. - 13. February (4)

26. - 27. Februar
(cheese, cream, yogurt)

28. - 29. October (4)

01. October (4)

19. November (butter only)


Basic chemical composition of milk: milk fat, protein, lactose, dry matter
(1) basic chemical composition, somatic cell count, freezing point value, urea
(2) basic chemical composition, urea
(3) basic chemical composition, freezing point value, urea
(4) basic chemical composition
(5) cheese: milk fat, protein, dry matter, pH, NaCl;
   cream: milk fat, protein, dry matter
   yogurt: milk fat, protein, dry matter, pH, lactic acid
   butter: milk fat, solids-non-fat, water


 

Plan for delivery of calibration samples for the 2019.

 

Cow milk*

Goat milk**

Sheep milk**

16. - 17. January

    -

   -

06. - 07. February

    -

   -

06. - 07. March

13. - 14. March

   -

10. - 11. April

17. - 18. April

03. - 04. April

15. - 16. May

22. - 23. May

08. - 09. May

12. - 13. June

19. June

05. - 06. June

03. - 04.July

17. - 18.July

10. - 11. July

21. - 22. August

14. August
(+somatic cell count)

28. - 29. August
(+somatic cell count)

04. - 05. September

18. - 19. September

25. - 26. September

16. - 17. October

  11. October

   

13. - 14. November

06. - 07. November

   

11. - 12. December

   

   


Pasterised milk***

Sterilised milk***

Cheese, Cream, Yogut ****

20. - 21. February

13. - 14. February

27. - 28. February

23. - 24. October

02. - 03. October

27. - 28. November + butter


    * basic chemical content, comatic cell count, freezing point and urea
  ** basic chemical content, točka ledišta
*** basic chemical content
**** cheese: fat, protein, dry matter, pH, NaCl;
       cream: fat, protein, dry matter;
       yogurt: fat, protein, dry matter, pH, lactic acid;
       butter: fat, non fat dry matter, water

 



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