Solid-phase extraction coupled with HPLC-DAD for determination of B vitamin concentrations in halophytes

In our study, a simple and sensitive method was proposed for determination of vitamins B group in leaves of Suaeda aegyptiaca and Suaeda Vera (Halophytes) by HPLC-DAD with solid-phase extraction (SPE) as the preconcentration step. The variables affecting the extraction and determination conditions were investigated and optimized. A preconcentration step based on SPE is necessary to remove interfering components. The limit of detection obtained was <5 mg kg(-1), the relative standard deviation (RSD) was <4%, and the recovery was in the range of 91-102%. The linear correlation coefficient was 0.999. The method was successfully applied to determine group B vitamins in the halophyte samples. As a whole, these findings may confirm the interesting potential of this halophyte as a valuable source of natural bioactive molecules.