Table 2.
Comparison of the results of previous electrochemical studies for the determination of L-tryptophan.
| Electrode | LOD (µM) | Linear range (µM) | Method | References |
|---|---|---|---|---|
| aCuCoHCF/graphite electrode | 6.0 | 10.0–900.0 | bAMP | 36 |
| cNafion/TiO2-GR/GCE | 0.7 | 5.0–140.0 | dDPV | 37 |
| eCILE/GNP | 4.0 | 5.0–900 | fSWE | 38 |
| gMWNTs/MGF/GCE | 0.87 |
5.0–30.0 60.0–500 |
dDPV | 39 |
| hNiCoO2/C modifed GCE | 5.7 |
0.0–390.63 390.63–943.4 |
dDPV | 40 |
| Graphite electrode | 1.73 | 5.0–150.0 | dDPV | This investigation |
aCopper-cobalt hexacyanoferrate film modified graphite electrode; bAmperometry; cGlassy carbon electrode modified with a Nafion/TiO2-graphene composite film; dDifferential pulse voltammetry; eCarbon ionic liquid electrode (CILE) modified with gold nanoparticle (GNP); fSquare wave voltammetry; gA multi-walled carbon nanotubes (MWNTs) bridged mesocellular graphene foam (MGF) nanocomposite(MWNTs/MGF) modified glassy carbon electrode; hCarbon-supported NiCoO2 nanoparticles (NiCoO2/C) modified glassy carbon electrode (GCE).