Table 4.
List of top eight keywords about the detection of microplastics.
| No. | Freq | Keywords |
|---|---|---|
| 1 | 30 | Nile red |
| 2 | 24 | Spectroscopy |
| 3 | 20 | Raman spectroscopy |
| 4 | 16 | FTIR |
| 5 | 13 | Microscopy |
| 6 | 8 | Density separation |
| 7 | 6 | Microspectroscopy |
| 8 | 5 | Mass spectrometry |
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