Table 2.
LOD, LOQ, linear regression calibration curves, regression coefficient (R2), recovery, and repeatability of biogenic amines, by the analytical method in samples of honey.
| Aminoacids/biogenic amines | LOD a (mg/L) | LOQ (mg/L) | Regression equation | R2 | Recovery b values (%) | Repeatability c |
|---|---|---|---|---|---|---|
| Tryptophan | 0.019 | 0.104 | y = 0.3614x + 0.1297 | .99 | 96.5 | 3.3 |
| 5-OH-tryptophan | 0.026 | 0.102 | y = 0.2574x + 0.0561 | .99 | 97.3 | 3.1 |
| Tryptamine | 0.049 | 0.106 | y = 4.232x + 42.342 | .99 | 94.8 | 4.1 |
| Serotonin | 0.013 | 0.085 | y = 4.0423x + 19.911 | .99 | 96.7 | 3.2 |
| Melatonin | 0.013 | 0.102 | y = 1.3749x + 0.9985 | .99 | 92.3 | 3.9 |
| L-dopa | 0.018 | 0.110 | y = 205.1x − 0.012 | .99 | 91.9 | 3.5 |
| Dopamine | 0.029 | 0.099 | y = 3.822x + 71.767 | .98 | 101.2 | 4.1 |
a
Range for amino acids and biogenic amines 12.5 to 200 mg/L.
b
n = 6.
c
n = 6.