Linearity, LOD, LOQ of five analytesa.
| Analytes | Linear range (μg mL−1) | Linear equation | r 2 | LOD (μg mL−1) | LOQ (μg mL−1) |
|---|---|---|---|---|---|
| MP | 0.5–20.0 | y = 58.197× | 0.9986 | 0.15 | 0.40 |
| EP | 0.5–20.0 | y = 50.961× | 0.9999 | 0.15 | 0.40 |
| IPP | 0.5–20.0 | y = 49.947× | 0.9999 | 0.20 | 0.45 |
| PP | 0.5–20.0 | y = 51.418× | 0.9998 | 0.20 | 0.45 |
| IBP | 0.5–20.0 | y = 45.871× | 0.9999 | 0.20 | 0.45 |
MP, methyl paraben. EP, ethyl paraben. IPP, isopropyl paraben. PP, propyl paraben. IBP, isobutyl paraben.