Separation of hydrophilic isomers is very difficult when only one mechanism of retention, like reversed-phase, is available. Isomers have very similar hydrophobic properties. In case of mixed-mode chromatography, small difference in hydrophobic and ionic properties allows to separate isomers. Isomers of dihydroxybenzoic acids are separated on a Primesep D column with good selectivity and peak shape. This method can be used for separation of other hydrophilic acidic compounds as well as hydrophobic basic compound.
| Column | Primesep D, 4.6×150 mm, 5 µm, 100A |
| Mobile Phase | MeCN |
| Buffer | TFA |
| Flow Rate | 1.0 ml/min |
| Detection | UV, 250 nm |
| Class of Compounds |
Drug, Acid, Hydrophilic, Ionizable, Vitamin, Supplements |
| Analyzing Compounds | 3.4-dihydroxybenzoic acid, 3.5-dihydroxybenzoic acid,2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,3-dihydroxybenzoic acid |
Application Column
Primesep D
The Primesep family of mixed-mode columns offers a wide variety of stationary phases, boasting unprecedented selectivity in the separation of a broad array of chemical compounds across multiple applications. Corresponding Primesep guard columns, available with all stationary phases, do not require holders. SIELC provides a method development service available to all customers. Inquire about our specially-tailored custom LC-phases for specific separations.
Select options2,4-Dihydroxybenzoic Acid
2,5-Dihydroxybenzoic Acid
3,4-Dihydroxybenzoic Acid
3,5-Dihydroxybenzoic Acid
