ODOUR REDUCTION | INNOVATION
involves determination of characteristic odour attributes, which are rated individually on their intensity. Furthermore, the overall odour intensity and the hedonic tone (like or dislike) of the sample’s smell are also evaluated. Established techniques for the extraction and enrichment of odour-active substances are applied for the thorough isolation of these substances from the sample matrix. Depending on the type of VOCs present and the complexity of the matrix, different methods are used. These include different head- space techniques for the direct isolation of high volatile compounds, as well as solvent extraction of the sample followed by a solvent-assisted distilla- tion under high vacuum to separate out non-vola- tile matrix compounds. This methodology has been optimised at Fraunhofer IVV based on the estab- lished Solvent Assisted Flavor Evaporation (SAFE) technique (Engel W, Bahr W, Schieberle P. Eur Food Res Technol 209 (3–4), 237–241, (1999)). After further concentration and purification steps (Bemelmans JMH: Review of isolation and concen- tration techniques. In: Land DG & Nustern HE (ed.): Progress in flavour research, p. 79–98. Applied Science Publ. London (1979)), the odour quality
A schematic of the two-dimensional high resolution gas chromatography- mass spectrometry-olfactometry (2D-HR-GC-MS/O) process Source: Fraunhofer IVV
and chemical structure of the underlying odourants are determined using GC-O and 2D-HR-GC-MS/O. By applying 2D-HR-GC-MS/O, the odour-active substances can be further separated from other co-eluting substances and sensitively detected in the slightest of traces by the mass spectrometer. Fraunhofer IVV’s Erika Zardin adds that future
work related to the sensory impressions of recycled materials will be receiving increasing attention. “As well as recycled HDPE, our group addresses the
CREATIVE RECYCLING Add Value to Your Scrap.
Struktol Company of America creates cutting edge additive solutions for recycled polymers.
• Odor / Volatile Reduction & Control • Viscosity Modification & Lubrication • Mixing / Blending / Homogenization
We help our customers develop value-added, high-performance upcycled compounds opening a wide window of feed stream options.
Learn more at
4struktol.com or email
plastics@struktol.com
great IDEAS are born he re !
Recycle
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54
