Stability of flavoured phytosterol-enriched drinking yogurts during storage as affected by different packaging materials.
BACKGROUND
The aim of this study was to investigate the influence of different packaging materials on storage stability of flavoured phytosterol-enriched drinking yogurts. White vanilla (WV) and blood orange (BO) phytosterol-enriched drinking yogurts conditioned in mono-layer and triple-layer co-extruded plastic bottles were stored at +6 ± 1 °C for 35 days (under alternating 12 h light and 12 h darkness) to simulate shelf-life conditions. Samples were collected at three different storage times and subjected to determination of total sterol content (TSC), peroxide value (PV) and thiobarbituric acid reactive substances (TBARs).


RESULTS
TSC was not significantly affected by packaging material or storage time and met the quantity declared on the label. PV was significantly influenced by yogurt type × packaging material × storage time interaction and TBARs by packaging material × storage time interaction.


CONCLUSIONS
Between the two packaging materials, the triple-layer plastic mini bottle with black coloured and completely opaque intermediate layer offered the best protection against lipid oxidation. © 2015 Society of Chemical Industry.
Department of Food Engineering, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur St, 400372 Cluj-Napoca, Romania.
Cristina Anamaria
http://orcid.org/0000-0002-9721-4560
CA
Semeniuc
Inter-Departmental Centre for Agri-Food Industrial Research, Alma Mater Studiorum-Università di Bologna, Piazza Goidanich 60, 47521 Cesena, Italy.
Vladimiro
V
Cardenia
Department of Food Science, Alma Mater Studiorum-Università di Bologna, Viale Fanin 40, 40127 Bologna, Italy.
Mara
M
Mandrioli
Department of Food Engineering, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, 3-5 Mănăştur St, 400372 Cluj-Napoca, Romania.
Sevastiţa
http://orcid.org/0000-0002-7352-6957
S
Muste
Granarolo S.p.A., Via Cadriano 27/2, 40127 Bologna, Italy.
Andrea
A
Borsari
Department of Food Science, Alma Mater Studiorum-Università di Bologna, Viale Fanin 40, 40127 Bologna, Italy.
Maria Teresa
MT
Rodriguez-Estrada
D001628:Beverages; D018857:Food Packaging; D061353:Food Storage; D010840:Phytosterols / Q000494:pharmacology*; D013649:Taste; D013997:Time Factors; D015014:Yogurt / Q000032:analysis*
D010840:Phytosterols
bottle packaging material; flavoured phytosterol-enriched drinking yogurt; functional foods; lipid oxidation; storage