The characterization of microplastics (MPs) in environmental matrices is frequently hampered by the spectral complexity of heterogeneous mixtures and the presence of interferents. This study has validated a new analytical framework using portable Near-Infrared (NIR) spectroscopy combined with chemometric modelling to move beyond qualitative detection toward field quantification: Cruz Muñoz, E., Marchesi, C., Rigo, M., Ali, S., Depero, L., de Lucia, G., Camedda, A., Prati, S., Ballabio, D., Sciutto, G., Federici, S. (2026) Near-infrared (NIR) spectroscopy for quantitative modelling of quaternary microplastic mixtures and the effect of interferents, Microchemical Journal, 225, 118027 [link]