Interaction of Rhodamine 6G with Biodegradable Poly(lactic Acid) Nanoparticles: A Suitable Analytical Strategy for the Detection of Nanoplastics in Water
Poly(lactic acid) nanoparticles (PLA-NP) with an average size of 70 nm, effectively quench the fluorescence emission of rhodamine 6G via static quenching. This process occurs as a result of forming a nonfluorescent complex in the ground state. The determined Stern–Volmer constant depends on the incubation time, being 1.88 times more sensitive at 5 min compared to 1 min, attributed to conformational changes after the rhodamine binds to the nanoparticle surface. The decrease in the fluorescence signal was employed as the analytical strategy for detecting and quantifying PLA-NP in aqueous systems, achieving a limit of detection of 26.5 pM. The accuracy of the determination was demonstrated with 95% confidence by recovery assays (90%–110%) in spiked samples of surface river water. This method represents a promising tool for researchers and environmental scientists dedicated to monitoring and mitigating water pollution caused by nanoplastics.
Authors
- Facundo Mattea (ORCID: https://orcid.org/0000-0002-8205-9641)
- Marcelo R. Romero (ORCID: https://orcid.org/0000-0001-6682-7025)
- Natalia L. Pacioni (ORCID: https://orcid.org/0000-0002-3353-205X)
- M. Andrea Molina Torres (ORCID: https://orcid.org/0009-0006-6688-5632)
- Janet de los Angeles Chinellato Díaz
Institutions
- Universidad Nacional de Córdoba (AR)
- Instituto de Investigaciones en Ciencias de la Salud (AR)
- Instituto de Desarrollo Tecnológico para la Industria Química (AR)
Publication Details
- Journal
- ACS Applied Polymer Materials
- Published
- 2025-09-15
- DOI
- https://doi.org/10.1021/acsapm.5c02021
- Primary Topic
- Microplastics and Plastic Pollution
- Type
- article
- Field-Weighted Citation Impact
- 0.00