Table 1.
Main physical and chemical properties of the four tested compounds, together with the correlations in concentrations (for each compound) expressed in either as ppm or molarity (M), using the 0.1% (v/v or w/v) as a reference concentration.
| Compound | Physical Form (20 °C) | Molar Mass (g/mol) | Density (g/mL) | Concentration | ||
|---|---|---|---|---|---|---|
| % | ppm | M (mol/L) | ||||
| carvacrol | liquid | 150.22 | 0.976 | 0.1 (v/v) | 1000 | 0.00650 |
| thymol | powder | 150.22 | unknown 1 | 0.1 (w/v) | 1000 | 0.00666 |
| eugenol | liquid | 164.21 | 1.068 | 0.1 (v/v) | 1000 | 0.00650 |
| BAC | liquid | unknown 2 | 0.98 | 0.1 (v/v) | 1000 | unknown 2 |
1 Not provided by the manufacturer; 2 BAC was provided a mixture of QACs with different lengths for the alkyl chain (ranging from C8 to C16).