Odour and emissions | analysis
used to assess the overall odour conformity against accepted quality standards. In addition, the chromato- grams allow investigation of the nature of volatile compounds involved, to explain off-odours or defects, or explain differences. “Using this electronic nose, a packaging material
can be evaluated in minutes instead of several days with a panel test,” says Bonnefille. “The analytical through- put is high, because the instrument is available 24/7. Moreover, this method raises no health or safety issues because no human testing is involved.” Alpha MOS points out that the instrument allows
identification of the molecules entering the chemical composition of the headspace, whereas a sensory panel cannot do this so easily, while it also achieves an objective and repeatable evaluation - sensory panel results can suffer from a lack of repeatability due to possible internal variability or the influence of asses- sors’ mood or state of health and fatigue. “It is also difficult to maintain a constant performance of the panel over time - regular training is needed and results can be influenced by a turnover among members. The instrument ensures long-term repeatability, without
any drift over time,” Bonnefille explains. “Some polymer producers also contact us to analyse
samples in our laboratory and check the impact of a change in manufacturing process parameters or a product entering production, such as inks, on the odour of the final product…The customer wants to know if the changes implemented will maintain consistent quality in terms of odour and sensory characteristics. In addition, several customers producing polymers or packaging materials, such as liners and closures, also use our instruments to control the quality of their production process on a daily basis,” she says. For the future, Alpha MOS says it is investing in
research and development of micro-sensors and has a project underway to develop miniaturised systems for online odour testing directly on production lines. Ideally, these devices will allow odour control during production and be able to adjust manufacturing parameters rapidly as a result of a deviation from the standard quality.
Click on the links for more information: ❙
www.ivv.fraunhofer.de ❙
www.alpha-mos.com
SOLVED ODOR & VOLATILES Turn Your Obstacles into Opportunities
Struktol engineered odor and volatile control additives can help you solve “smelly” problems. From high odor/volatile feed streams in recycled applications through strict odor/VOC specifications in automotive and packaging applications – these can be solved by adding a small amount of our unique solutions.
Smell Anything? That’s the point! u
r
Learn more at
wpc.struktol.com or email
plastics@struktol.com
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