| | Pollutants | Samples | Used IL | Analysis condition | Operation method | Added (μg/L) | Found (μg/L) | Recovery (%) | LOD (μg/L) | RSD (%) | Ref. |
| | o,p’-DDT, p,p’-DDT, p,p’-DDD, and p,p’-DDE | Snow, rain, lake, and tap water (5.0 mL) | 300.0 μL of [BMIM][PF6], [HMIM][PF6], [OMIM][PF6], [BMIM][BF4], [EMIM][BF4], and [BMIM]NO3 | R.T.; HPLC | DLLME | 5.0 | — | 85.7–106.8 | 0.2–0.5 | 6.0–8.5 | [24] |
| | 17-β-Estradiol-benzoate, 17-α-estradiol, and quinestrol | Lake, well, tap, and river water (160.0 mL) | 80.0 μL of [BMIM][BF4] with 0.3 g of [NH4][PF6] | R.T.; HPLC | DLLME | 0.2–0.9 | — | 95.5–114.6 | 0.04–0.05 | 4.2–8.0 | [26] |
| | Phenol, CP, DCP, TCP, and PCP | Aqueous emulsion (10.0 mL) | 0.02% (v/v) of [BMIM][PF6] in TBP | R.T.; UV-vis | Liquid membranes | Extraction efficiency: 96.9%–99.5% | | [79] | | 0.2% (v/v) of aliquat 336 in TBP | Extraction efficiency: 90.1%–99.3% | | [80] |
| | Phenol, o-cresol, 2-chlorophenol, and resorcinol | Aqueous solution | 5.0 mg/mL of [BMIM][Tf2N], [HMIM][Tf2N], and [PMIM][Tf2N] | 33°C; color reaction | Liquid extraction | — | — | 99.99 | — | — | [81] |
| | Gallic acid, vanillic acid, and vsyringic acid | Salty aqueous solution (20.0 mL) | 5 wt% of [BMIM](SCN), [BMIM][TOS], [BMIM][N(CN)2], [BMIM][CH3CO2], [BMIM]Cl, [BMPIP]Cl, and [BMPYR]Cl | R.T.; UV-vis | ATP | Extraction efficiency: 66.0%–94.6% | — | [82] |
| | NT, DNT, and TNT | Tap and lake water (5.0 mL) | 26.0 mg of [HMIM][Tf2N] and [C6MPY][Tf2N] | R.T.; HPLC | DLLME | 5.0–20.0 | 4.7–20.0 | 93.2–101.0 | 0.7–1.1 | 3.1–4.3 | [83] |
| | BPA, 4-CP, t-BP, OP, t-OP, and NP | Deionized and sea water (20.0 mL) | 10.0 μL of [BMIM][Tf2N] | R.T.; HPLC | DLLME | — | — | 67.6–114.0 | 0.8–4.8 | 2.8–11.0 | [84] |
| | BPA and 2-naphthol | Tap, lake, and river water (5.0 mL) | 35.0 μL of [OMIM][PF6] | R.T.; HPLC | CIA-ME | 20.0 | — | 97.1–108.1 | 0.6–0.9 | 2.3–4.1 | [85] |
| | BPA | Tap, reservoir, and beach water (0.05 mL) | 5.0 μL of TOAP | 20°C; HPLC | ATPM | 100.0–1500.0 | 95.5–1559.0 | 95.5–109.9 | 4.3–4.6 | 2.9–4.5 | [86] |
| | TCL, DOX, BPA, TCS, and MTCS | Sea, WRTR, and tap water (5.0 mL) | 115.0 μL of [BMIM][PF6], [HMIM][PF6], and [OMIM][PF6] | R.T.; HPLC | SILM-DS | 8.0–50.0 | 6.3–47.7 | 74.5–106.9 | 0.1–0.8 | 2.2–6.5 | [87] |
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