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Composition, proteolysis, and volatile profile of Strachitunt cheese
F Masotti1, S Cattaneo1, M Stuknytė1
1Dipartimento di Scienze per gli Alimenti, la Nutrizione e l'Ambiente, Università degli Studi di Milano, via G. Celoria 2, 20133 Milan, Italy.
Strachitunt, a Protected Designation of Origin (PDO) Italian blue cheese, exhibits significant variability due to its dual-curd method and potential mold contamination. This results in a unique analytical profile and inconsistent product standardization.
Area of Science:
- Food Science
- Dairy Technology
- Analytical Chemistry
Background:
- Strachitunt is a blue-veined Italian cheese with Protected Designation of Origin (PDO) status.
- Its unique production involves a dual-curd method using raw bovine milk.
- The product specification prohibits secondary cultures of mold spores.
Purpose of the Study:
- To investigate the physico-chemical properties, proteolysis, and volatile profile of Strachitunt cheese.
- To understand the factors contributing to its unique analytical fingerprint and variability.
Main Methods:
- Analysis of 10 Strachitunt cheese samples (75 days ripened).
- Assessment of physico-chemical parameters, including pH.
- Evaluation of proteolysis extent and volatile organic compound profile.
Main Results:
- Significant variability in composition parameters was observed.
- Strachitunt cheese had an acidic paste (pH 5.46) and lower proteolysis than other blue cheeses.
- Alcohols and esters were the main volatile compounds; ketones were minor.
Conclusions:
- Erratic mold spore contamination, the dual-curd method, and variable ripening times contribute to Strachitunt's distinct analytical fingerprint.
- These factors also explain the limited standardization of this PDO blue cheese.
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