| A500 | Absorbance at the wavelength of 500 nm |
| A650 | Absorbance at the wavelength of 650 nm |
| AHPO | Alkaline hydrogen peroxide oxidation |
| 3-AHP | 3-Amino-4-hydroxyphenylalanine |
| 4-AHP | 4-Amino-3-hydroxyphenylalanine |
| AU | Arbitrary unit |
| DHI | 5,6-Dihydroxyindole |
| DHICA | 5,6-Dihydroxyindole-2-carboxylic acid |
| H2O2 | Hydrogen peroxide |
| HI | Hydroiodic acid |
| HPLC | High performance liquid chromatography |
| ITA | Individual Typology Angle |
| LOD | Limits of detection |
| LOQ | Limits of quantification |
| PDCA | Pyrrole-2,3-dicarboxylic acid |
| PTCA | Pyrrole-2,3,5-tricarboxylic acid |
| PTeCA | Pyrrole-2,3,4,5-tetracarboxylic acid |
| TDCA | Thiazole-4,5-dicarboxylic acid |
| TBA+Br− | Tetra n-butylammonium bromide |
| TM | Total melanin |
| TTCA | Thiazole-2,4,5-tricarboxylic acid |
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