The effects of vitamin E, Irganox 1010, and BHT as antioxidants for reducing the release of off-flavor (both off-odor and off-taste) from blow- molded HDPE bottles were investigated. A sensory study was conducted and showed that bottles containing vitamin E had a lower odor intensity and a higher acceptability for storage of drinking water compared to bottles contain ing Irganox 1010 or BHT. Forty-seven volatile compounds were identified to release from the bottles using the purge-and-trap GC/MS analysis. Those vola tile compounds, ranging from C 6 to C18, belonged to the groups of n-alkane, 1- alkene, aldehyde, ketone, phenolic, olefin, and paraffin; among them aldehydes and ketones were the most important due to their very low odor thresholds. The bottles containing vitamin E were found to release the least amount of alde hydes and ketones compared to bottles containing Irganox 1010 or BHT. The acceptability of drinking water is correlated inversely to the intensity of odor and taste as well as to the aldehyde/ketone concentration. Therefore vitamin E, although used at about 20% the concentration of Irganox 1010 or BHT, is a superior antioxidant for reducing off-odor and off-taste from HDPE bottles.
Hoff, A. and S. Jacobsson.1981. "Thermo-Oxidative Degradation of Low-Density Polyethylene Close to Industrial Processing Conditions"J. Appl. Polym. Sci., 26:3409-3423.
2.
Bravo, A. and J.H. Hotchkiss.1993. "Identification of Volatile Compounds Resulting from the Thermal Oxidation of Polyethylene", J. Appl. Polym. Sci.,47:1741-1748.
3.
Bravo, A., J.H. Hotchkiss and T.E. Acree.1992. "Identification of Odor-Active Compounds Resulting from Thermal Oxidation of Polyethylene"J. Agric. Food Chem., 40:1881-1885.
4.
Bueche, F.1960. "Mechanical Degradation of High Polymers"J. Appl. Polym. Sci., 4(10):101-106.
5.
Porter, R.S. , M.J.R. Cantow and J.F. Johnson.1967. "Polymer Degradation VI—Distribution Changes on Polyisobutene Degradation in Laminar Flow" , Polymer, 8:87-96.
6.
Davidson, V.J. , D. Paton, L.L. Diosady and G. Larocque.1984. "Degradation of Wheat Starch in a Single-Screw Extruder: Characteristics of Extruded Starch Polymers" , J. Food Sci., 49:453-458.
7.
Chinnaswamy, R. and M.A. Hanna.1990. "Macromolecular and Functional Properties of Native and Extrusion-Cooked Corn Starch", Cereal Chem., 67:490-499.
8.
Till, D.E., D.J. Ehntholt, R.C. Reid, P.S. Schwartz, K.R. Sidman, A.D. Schwope and R.H. Whelan.1982. "Migration of BHT Antioxidant from High Density Polyethylene to Foods and Food Simulants", Ind. Eng. Chem. Prod. Res. Dev., 21:106-113.
9.
Schwope, A.D. , D.E. Till, D.J. Ehntholt, K.R. Sidman, R.H. Whelan, P.S. Schwartz and R.C. Reid.1987. "Migration of BHT and Irganox 1010 from Low-Density Polyethylene (LDPE) to Foods and Food-Simulating Liquids", Food Chem. Toxic., 25(4):317-326.
Packer, J.E. , T.F. Slater, and R.L. Willson.1979. "Direct Observation of a Free Radical Interaction between Vitamin E and Vitamin C", Nature, 278:737-738.
12.
Barclay, L.R.C. , S.J. Locke and J.M. MacNeil.1983. "The Autoxidation of Unsaturated Lipids in Micelles-Synergism of Inhibitors Vitamin C and E", Canadian J. Chem., 61:1288-1290.
13.
Barclay, L.R.C. , S.J. Locke, J.M. MacNeil, J. VanKessel, G.W. Burton and K.U. Ingold.1984. "Autoxidation of Micelles and Model Membranes: Quantitive Kinetic Measurements Can Be Made by Using Either WaterSoluble or Lipid-Soluble Chain-Breaking Antioxidants", J. Am. Chem. Soc., 106:2479-2481.
14.
Scarpa, M., A. Rigo, M. Maiorino, F. Ursini and C. Gregolin.1984. "Formation of α-Tocopherol Radical and Recycling of α-Tocopherol by Ascorbic Acid during Peroxidation of Phosphatidylcholine Liposomes. An Electron Paramagnetic Resonance Study", Biochim. Biophys. Acta., 801:215-219.
15.
Lambelet, P., F. Saucy and J. Löliger.1985. "Chemical Evidence for Interactions between Vitamin E and C", Experientia, 41:1384-1388.
16.
Burton, G.W. and K.U. Ingold.1986. "Vitamin E: Application of the Principles of Physical Organic Chemistry to the Exploration of Structure and Function", Acc. Chem. Research, 19:194-201.
17.
Laermer, S.F. and F. Nabholz.1990. "Use of Biological Antioxidants as Polypropylene Stabilizers", Plastics and Rubber Processing and Applications, 14(4):235-239.
18.
Laermer, S.F. and P.F. Zambetti.1992. "Alpha-Tocopherol (Vitamin E)-The Natural Antioxidant for Polyolefins", J Plastic Film & Sheeting, 8:228-248.
19.
Laermer, S.F. , S.S. Young and P.F. Zambetti.1993. "Vitamin E: New Developments in Polyolefin Antioxidant Technology", Proceedings in SPO 93, pp. 541-585.
20.
Lyon, D.H., M.A. Francombe, T.A. Hasdell and K. Lawson.1992. Guidelines for Sensory Analysis in Food Product Development and Quality Control, Chapman & Hall, Inc., New York, pp. 23-25.
21.
Meilgaard, M. , G.V. Civille and B.T. Carr.1992. Sensory Evaluation Techniques , (2ndEd.) CRC Press, Inc., Boston, pp. 71-74.
22.
Hartman, T.G. , J. Lech, E. Fukuda and R.T. Rosen.1991. "Methodologies for the Quantification of Purge and Trap Thermal Desorption and Direct Thermal Desorption Analyses", Mass Spec. SourceXIV(3):18-23.
23.
Hartman, T.G. , J. Lech, K. Karmas, J. Salinas, R.T. Rosen and C-T. Ho .1993. "Flavor Characterization Using Adsorbent Trapping-Thermal Desorption or Direct Thermal Desorption-Gas Chromatography and Gas Chromatography-Mass Spectrometry", In Flavor Measurement, C-T. Ho and C. H. Manley, eds., Marcel Dekker, Inc., New York, pp. 37-59.
24.
Koszinowski, J. and Piringer, O.1986. "Evaluation of Off-Odors in Food Packaging-The Role of Conjugated Unsaturated Carbonyl Compounds" , J. Plastic Film & Sheeting, 2:40-50.
25.
Devos, M., F. Patte, J. Rouault, P. Laffort and L.J. Van Gemert .1990. Standardized Human Olfactory Thresholds, (1stEd.) Oxford University Press, New York.
26.
Koszinowksi, J. and O. Piringer.1983. "Die Bedeutung von Oxidationsprodukten Ungesättigter Kohlenwasserstoffe für die Sensorischen Eigenschaften von Lebensmittelverpackungen", Dtsch. Lebensm. Rundsch., 79:179-183.
27.
Michal, J., J. Mitera and S. Tardon.1976"Toxicity of Thermal Degradation Products of Polyethylene and Polypropylene", Fire Mater., 1:160-168.
28.
Holmström, A. and E.M. Sörvik.1970. "Thermal Degradation of Polyethylene in a Nitrogen Atmosphere of Low Oxygen Content-I. Changes in Molecular Weight Distribution", J. Chromatogr., 53:95-108.
29.
Holmström, A. and E.M. Sörvik.1974. "Thermal Degradation of Polyethylene in a Nitrogen Atmosphere of Low Oxygen Content-II. Structural Changes Occuring in Low-Density Polyethylene at an Oxygen Content Less than 0.0005%", J. Appl. Polym. Sci., 18:761-788.
30.
Holmström, A. and E.M. Sörvik.1974. "Thermal Degradation of Polyethylene in a Nitrogen Atmosphere of Low Oxygen Content-III. Structural Changes Occuring in Low-Density Polyethylene at an Oxygen Content Below 1.2%" , J. Appl. Polym. Sci., 18:3153-3178.
31.
Holmström, A. and E.M. Sörvik.1978. "Thermooxidative Degradation of Polyethylene. I and II. Structural Changes Occurring in Low-Density Polyethylene, High-Density Polyethylene, and Tetratetracontane Heated in Air"J Polym. Sci., Polym. Chem. Ed., 16:2555-2586.
