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Sensory characterization of polyester-based bottle material inertness using threshold odour number determination

Widén, Heléne LU and Hall, Gunnar (2007) In LWT- Food Science and Technology 40(1). p.66-72
Abstract
Refillable polyester bottles, for example polyethylene terephthalate (PET) bottles, are known to interact with chemicals. Aroma compounds from a product can be absorbed by the bottle material, remain after washing and remigrate when the bottle is reused, resulting in off-flavour of the new product. A certified reference material has recently been approved with which the chemical and sensory inertness of refillable bottle materials can be tested. In this study a sensory method aimed at characterizing the sensory inertness properties of the reference bottle material was developed. A use-reuse situation was simulated by storing bottle wall strips in a solution of four odour-active compounds (the loading phase) and, after cleaning, immersing... (More)
Refillable polyester bottles, for example polyethylene terephthalate (PET) bottles, are known to interact with chemicals. Aroma compounds from a product can be absorbed by the bottle material, remain after washing and remigrate when the bottle is reused, resulting in off-flavour of the new product. A certified reference material has recently been approved with which the chemical and sensory inertness of refillable bottle materials can be tested. In this study a sensory method aimed at characterizing the sensory inertness properties of the reference bottle material was developed. A use-reuse situation was simulated by storing bottle wall strips in a solution of four odour-active compounds (the loading phase) and, after cleaning, immersing them in water (the remigration phase). The remigration water was analysed with both a sensory method, i.e. determination of the threshold odour number, and chemically using gas chromatography mass spectrometry (GC-MS). Additionally, another PET and a polyethylene naphthalate (PEN) bottle material were also tested. The sensory threshold determination method could differentiate between the PEN materials and the PET materials. Results from chemical analysis showed that the inertness properties of the PET materials were very similar. The PEN material exhibited significantly superior inertness properties, with only 3-24% of the aroma transfer properties of PET. (c) 2005 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
naphthalate (PEN), polyethylene, refillable bottles, polyethylene terephthalate (PET), inertness testing, sensory analysis
in
LWT- Food Science and Technology
volume
40
issue
1
pages
66 - 72
publisher
Elsevier
external identifiers
  • wos:000240912800009
  • scopus:33746376336
ISSN
0023-6438
DOI
10.1016/j.lwt.2005.09.004
language
English
LU publication?
yes
id
8f1f0b4a-7204-4edd-a553-5e7ef082c9f5 (old id 389479)
date added to LUP
2008-01-03 10:25:41
date last changed
2017-08-20 04:22:05
@article{8f1f0b4a-7204-4edd-a553-5e7ef082c9f5,
  abstract     = {Refillable polyester bottles, for example polyethylene terephthalate (PET) bottles, are known to interact with chemicals. Aroma compounds from a product can be absorbed by the bottle material, remain after washing and remigrate when the bottle is reused, resulting in off-flavour of the new product. A certified reference material has recently been approved with which the chemical and sensory inertness of refillable bottle materials can be tested. In this study a sensory method aimed at characterizing the sensory inertness properties of the reference bottle material was developed. A use-reuse situation was simulated by storing bottle wall strips in a solution of four odour-active compounds (the loading phase) and, after cleaning, immersing them in water (the remigration phase). The remigration water was analysed with both a sensory method, i.e. determination of the threshold odour number, and chemically using gas chromatography mass spectrometry (GC-MS). Additionally, another PET and a polyethylene naphthalate (PEN) bottle material were also tested. The sensory threshold determination method could differentiate between the PEN materials and the PET materials. Results from chemical analysis showed that the inertness properties of the PET materials were very similar. The PEN material exhibited significantly superior inertness properties, with only 3-24% of the aroma transfer properties of PET. (c) 2005 Swiss Society of Food Science and Technology. Published by Elsevier Ltd. All rights reserved.},
  author       = {Widén, Heléne and Hall, Gunnar},
  issn         = {0023-6438},
  keyword      = {naphthalate (PEN),polyethylene,refillable bottles,polyethylene terephthalate (PET),inertness testing,sensory analysis},
  language     = {eng},
  number       = {1},
  pages        = {66--72},
  publisher    = {Elsevier},
  series       = {LWT- Food Science and Technology},
  title        = {Sensory characterization of polyester-based bottle material inertness using threshold odour number determination},
  url          = {http://dx.doi.org/10.1016/j.lwt.2005.09.004},
  volume       = {40},
  year         = {2007},
}