Table 1.
Comparison of similar Pb2+ sensors.
| DNA Probe | Linear Range | Detection Limit | Detection Methods | Detection Time | Reaction System | Reference |
|---|---|---|---|---|---|---|
| G-quadruplex | 1 ng/mL –1 mg/mL, R2 = 0.992 |
1 ng/mL (4.83 nM) | Fluorescence | 0.5 h | DsDNA’s conformational changes/PicoGreen | [25] |
| Allosteric G-quadruplex DNAzyme | 1 nM –316 nM, R2 = 0.980 |
1 nM | Chemiluminescence | 2 h | luminol-H2O2 | [26] |
| DNAzymes/AUR | 0 nM–1000 nM, R2 = 0.95 |
0.4 nM | Fluorescence | 3.5 h | G4/hemin/H2O2/AUR catalytic system | [27] |
| G-quadruplex DNAzyme | 5 nM–100 nM, R2 = 0.996 |
3 nM | Fluorescence | 3.5 h | catalytic beacons/G4/ZnPPIX | [28] |
| G-quadruplex DNAzyme | 10 nM–1000 nM, R2 = 0.997 |
0.06 nM | Fluorescence | 2.5 h | G4/ThT | This work |