Three of the products reminded the panellists of almonds, plastic and rubber, while the fourth more pungent one reminded them of glue and nail polish. They also rated the intensity of each odour, and had to guess whether these could be hazardous. The majority of these odorants were identified and among these were several fatty smelling mono- or di-unsaturated carbonyl compounds and their epoxidised derivatives, but also odouractive organic solvents such as cyclohexanone, isophorone, and phenol.Īs part of the study, a panel of trained volunteers sniffed each product, and ascribed common odour attributes to these. They extracted detectable odours from each sample using solvent extraction and high vacuum distillation methods, and then identified the main odorants using a combination of sensory and common analytical approaches.īetween 32 and 46 odours were detected in each sample, of which up to thirteen were quite intense. The researchers then investigated the molecular make-up of the distinctive smells arising from the pool toys. A small piece of material from each sample was analysed using a variety of material analysis techniques, including one that takes infrared measurements, and it was concluded that the inflatable objects were all made from polyvinyl chloride (PVC). Lead author Wiedmer (Fraunhofer Institute for Process Engineering and Packaging IVV in Germany) and his team conducted tests using an inflatable beach ball, a pair of swimming armbands and two bathing rings they bought off the shelf from local stores and online suppliers in Germany.
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