| 초록 |
Nanoplastics are a growing environmental concern because they can easily penetrate biological tissues and have possible toxic effects. FT-IR and Raman spectroscopy methods are currently used to analyze microplastics, but they encounter difficulty when the particles are below 1 µm. Therefore, we proposed the colorimetric detection method with gold nanoparticles (AuNPs) to measure the concentration of polystyrene nanoplastics (PSNPs, size = 350 and 880 nm) through a color change that is obvious to the naked eye. A mixed dispersion of PSNPs and AuNPs was added with acetone. Both the acetone itself and the dissolved polymer chains affect the aggregation and color of AuNPs (dispersed = red, aggregated = blue). Finally, the heat-map between PSNSs and acetone was prepared to use for estimation of concentration of PSNPs in the aqueous solution with naked eye. These results provide a basis to quantify nanoplastics without requiring complicated equipment or skilled operators. |
