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Electrochemical determination of volatile markers of bio-based plastics contaminants
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Researchers developed an electrochemical sensor device to detect volatile organic compounds and formaldehyde released from bio-based food packaging materials including bio-PET, bio-PE, EPP, and PLA during heating, finding the sensors produced results comparable to precision gas chromatography and demonstrating their utility for preliminary safety screening of packaging contaminants.
Currently, popular packages, containers and packaging made of biological materials can be a source of undesirable organic contaminants such as total volatile organic compounds (TVOC) and carcinogenic formaldehyde (HCHO) as these compounds can easily get into food. The paper presents a proposal to use an original measuring device based on electrochemical sensors DFR-08605 and SGP30 to determine the content of TVOC and HCHO released during heating of the above-mentioned materials. The proposed device was used to monitor HCHO during heating of food contact materials: bio-PET (bio-polyethylene terephthalate), bio-PE (bio-ethylene), EPP (expanded polypropylene) and PLA (polylactide). The obtained results were compared with the results of precise GC-ECD (gas chromatography with electron capture detector) analyses. The possibility of using electrochemical sensors for preliminary analyses of packaging materials was confirmed.
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This review evaluates electrochemical sensor technologies as alternatives to conventional spectroscopy methods for detecting micro- and nanoplastics in environmental samples. Researchers found that electrochemical approaches offer advantages in cost, portability, and speed, making them better suited for widespread field monitoring. The study identifies key technical challenges that need to be resolved before these sensors can be broadly adopted for routine environmental surveillance.
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Researchers developed a sandwich-based electrochemical sensor that uses gold nanoparticles and the signal molecule ferrocene to detect trace nanoplastics released from food packaging, exploiting both electrostatic attraction and hydrophobic interactions for selectivity. The method detected nanoplastics from PS, PP, PE, and PA packaging within a dynamic range of 1-100 micrograms per liter, revealing that teabags release significantly more nanoplastics than instant noodle boxes or paper cups.
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