Off-flavor development in milk packaged in polyethylene-coated paperboard cartons
1992
Leong, C.M.O. | Harte, B.R. | Partridge, J.A. | Ott, D.B. | Downes, T.W.
Development of a packaging flavor in milk packaged in half-pint (236-ml) polyethylene-coated paperboard cartons was investigated. Whole milk, low fat milk, skim milk, and water were filled into polyethylene-coated cartons. Milk and water in glass containers were used as control. Products were evaluated by a 10-member sensory panel using a paired comparison test after 1, 3, and 6 d of storage at 2.2 degrees C. Panelists were selected based on their ability to detect milk off-flavors. Container size and package heat sealing were also investigated as variables affecting packaging flavor. Packaging flavor developed in milk and water packaged in half-pint cartons after 1 d of storage. There was no significant increase in the off-flavor intensity in milk following 3 d of storage. Milk packaged in half-pint cartons had a more intense packaging flavor than milk in quart (946-ml) and half-gallon (1890-ml) cartons after 6 d (P less than or equal to .05). Off-flavor development was not due to the package heat-sealing process in the dairy.
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