| 초록 |
New ionic liquid-modified silica sorbents were developed by the surface chemical modification of the commercial silica using synthesized ionic liquids. The obtained ionic liquid-modified particles were successfully used as a special sorbent in solid-phase extraction process to isolation of cryptotanshinone, tanshinone I and tanshinone IIA from Salvia Miltiorrhiza Bunge. Different washing and elution solvents such as water, methanol and methanol-acetic acid (90/10, v/v) were evaluated. A comparison of ionic liquid-modified silica cartridges and traditional silica cartridge show that higher recovery was observed using ionic liquid-modified silica sorbents. A quantitative analysis was conducted by high-performance liquid chromatography using a C18 column (5 μm, 150×4.6 mm) with methanol-water (78:22, v/v, and containing 0.5% acetic acid) as a mobile phase. Good linearity were obtained from 0.5×10-4 to 0.5 mg/mL (r2＞0.999) with the relative standard deviations less than 4.8%. |
