Ultra high pressure homogenization (UHPH) was applied on soymilk to produce an aseptically packaged beverage.
UHPH-treated soymilk (300 MPa, 80 °C inlet temperature and 144 °C/0.7 s at the homogenization valve)
was compared with samples treated by ultra high temperature (UHT) at 142 °C for 6 s. After treatment, soymilk
samples were aseptically packaged in coated paperboard cartons of 200 mL Tetra Brik containers. Tetra Brik
containers were stored for 6 months at room temperature and analyzed at different days. Microbiological
(totalmesophilic aerobic bacteria, aerobic spores, Bacillus cereus, and enterobacteria counts), physical (dispersion
stability and particle size distribution), chemical (hydroperoxide index and volatile profile evolution) and sensory
analyses were performed on soymilks. Both UHPH and UHT soymilks did not present microbiological growth
during storage. UHPH soymilk presented high colloidal stability and relevant decrease in hydroperoxide index
during storage. On the other hand, almost all of the compounds associated to off-flavorswere detected in the volatile
profile of soymilk. Sensory results indicated that UHPH treatment did not produce changes in soymilkwhich
could affect the panel perception for different UHT and UHPH soymilks and for selecting their preference.