December 17, 2021 - Scientists perform migration experiments for oligomer analysis; one study detects eight chemicals including six non-intentionally added oligomers to migrate from multilayer biodegradable teacups; second study reports on oligomer migration from polycarbonate tableware as ‘hidden source’ of bisphenol A (BPA).
In an article published on December 7, 2021, in the peer-reviewed journal Food Chemistry, Elena Canellas and co-authors from the University of Zaragoza, Spain, reported on the migration of non-intentionally added substances (NIAS), including oligomers, from biodegradable teacups. The scientists purchased a multilayer teacup which is, according to the manufacturer, 100% compostable and biodegradable being made of 40% polyester, 60% polylactic acid (PLA), as well as biodegradable adhesives and paper. Migration experiments were performed with the biodegradable polymer in contact with hot (100 °C) or cold (20 °C) tea. Samples were applied to liquid chromatography coupled to ion mobility time-of-flight mass spectrometry (UPLC–IMS-Q/TOF) and gas chromatography-mass spectrometry (HS-SPME–GC–MS) for the non-target analysis of non-volatile and volatile compounds, respectively. ... read more
