Table 2.
Sample pretreatment before density separation and organic removal for MPs analysis in soil.
| No. | Sampling site | Sample processing | Sample amounts | Ref. | ||
|---|---|---|---|---|---|---|
| Sieving | Drying | |||||
| Temperature (°C) |
Time | |||||
| 1 | Shanghai farmlands, China | N/A | 70 | 24 h | N/A | (Liu et al., 2018) |
| 2 | Floodplain, Swiss | 1 mm | 65 | N/A | 50 mL of dried and sieved soil sample | (Scheurer and Bigalke, 2018) |
| 3 | Chai river valley cropped area, China | 10 mm | 25 | N/A | 30 g (DW) | (Zhang and Liu, 2018) |
| 4 | Shandong province coastal beaches, China | N/A | 105 | >12 | N/A | (Zhou et al., 2018) |
| 5 | Nanjing, Wuxi and Jiangsu province agriculture lands, China | 5 mm, 1 mm | Air dry | N/A | 50 g | (Li et al., 2019) |
| 6 | Shanghai farmlands, China | N/A | 70 | 24 h | N/A | (Lv et al., 2019) |
| 7 | Melipilla agricultural field, Chile | 2 mm | 40 ± 2 | N/A | 5 ± 0.01 g | (Corradini et al., 2019) |
| 8 | Shanghai farmlands soil, yellow-brown soil, paddy soil and floodplain soil, China | 5 mm | 70 | 24 h | 50–200 g (DW) | (Liu et al., 2019b) |
| 9 | Shihezi cotton fields, China | 5 mm | Air dry | N/A | 20 g (DW) | (Huang et al., 2020) |
| 10 | Paotai town, Shihezi, Xinjiang agricultural soils, China | 2 mm, 0.9 mm, 0.28 mm, 0.15 mm | N/A | N/A | 1 kg (DW) | (Li et al., 2020) |
| 11 | Hangzhou bay coastal plain farmlands, China | 5 mm | 25 | N/A | 50 g (DW) | (Zhou et al., 2020) |
| 12 | Yellow river delta wetland in Shangdong, China | 2 mm | N/A | N/A | 1 kg (DW) | (Duan et al., 2020) |
| 13 | Eight different land use types in Lahore, Pakistan | 5 mm, 50 μm (wet sieving) | N/A | N/A | 200 g (DW) | (Rafique et al., 2020) |
| 14 | Arable soils, pastures, rangelands and natural grasslands in metropolitan, Chile | 2 mm | N/A | N/A | 5 g (for visual identification), 1 g (for FTIR) | (Corradini et al., 2021) |
| 15 | Tedori river alluvial fan, Japan | N/A | 60 | 48 h | 1 kg (DW) | (Katsumi et al., 2021) |
| 16 | Forest, suburban and agricultural land in Yeoju, Korea | 5 mm | 60 | 48 h | 50 g (DW) | (Choi et al., 2021) |
| 17 | Agricultural soils in Yongin, Korea | 5 mm | N/A | N/A | 200 g (DW) | (Kim et al., 2021) |
| 18 | Agricultural fields, Mauritius | 10 mm, 6 mm, 2 mm | 60 | 72 h | 150 g | (Ragoobur et al., 2021) |
| 19 | Agricultural fields in Miyagi, Japan | 2 mm | 60 | 72 h | 10 g | (Grause et al., 2022) |
| 20 | Irrigated soils in Fuerteventura, Spain | N/A | N/A | N/A | 10 g | (Pérez-Reverón et al., 2022) |
Note: DW (Dried Weight) and WW (Wet Weight).