e-journal
Protecting soymilk fl avor and nutrients from photodegradation
Abstract:
Five different packaging treatments were studied over a 36- day period to determine if they protected soymilk from photo- oxidation. Soymilk was packaged in high- density polyethylene ( HDPE ) bottles with and without light protective additives ( LPA ). Two controls [(1) no LPA (translucent appearance); (2) a light- protected control (foil overwrap over no LPA control)] and three LPA - containing treatments, Low (0.6% TiO 2 ), Medium (1.3% TiO 2 ), High (4.3% TiO 2 ) were studied. Bottles were stored in a lighted refrigerated display case (average light intensity between 800 to 2200 lux; 3°C) for 36 days and evaluated weekly. Soymilk packaged in high LPA bottles was protected from developing light- oxidized off- fl avors and odors for a minimum of 15 days. High LPA bottles provided protection for ribofl avin and controlled development of photooxidative products for approximately 29 days.
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