fig4
![A baseline for microplastic occurrence in three New England estuaries](https://image.oaes.cc/61db4316-cc0f-4f42-8c7b-2f63504b05de/wecn3054.fig.4.jpg)
Figure 4. Spectrally determined (LDIR) elemental composition of MP detected in representative water samples from Great Bay Estuary. Panels show data for (A) Nannie Island August 2020; (B) Nannie Island April 2021; (C) Oyster River July 2020; and (D) Adams Point October 2020. LDIR: Laser direct infrared spectrometry; MP: microplastics.