Table 1 |
||||
|
Mobile phase compositions for the separation of preservatives by TLC (detected at 254 nm) |
||||
| Retardation factor (RF) |
||||
|
|
||||
| Mobile phase (v/v/v) |
Methylparaben |
Propylparaben |
Sorbic acid |
Benzoic acid |
|
|
||||
| CH3OH/H2O (80/20) |
0.70 |
0.57 |
0.68 |
0.69 (Faint spot) |
| CH3OH/H2O/CH3COOH (70/30/1) |
0.47 |
0.28 |
0.47 |
0.50 (Faint spot) |
| CH3OH/H2O/CH3COOH (80/20/1) |
0.75 |
0.67 |
0.75 |
0.75 |
| CH3OH/H2O/CH3COOH (80/20/3) |
0.57 |
0.48 |
0.64 |
0.64 (Faint spot) |
| CH3OH/H2O/NH3 (80/20/1) |
0.80 |
0.70 |
0.87 |
Highly faint spot |
| CH3CN/H2O/CH3COOH (95/5/1) |
0.88 |
0.81 |
0.84 |
Highly faint spot |
|
|
||||
|
Atemnkeng et al. Malaria Journal 2007 6:12 doi:10.1186/1475-2875-6-12 |
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