期刊
CHROMATOGRAPHIA
卷 73, 期 1-2, 页码 25-31出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10337-010-1836-y
关键词
Column liquid chromatography; Solid-phase extraction; Molecular imprinted ionic liquid-modified silica; Tanshinones; Salvia miltiorrhiza Bunge
资金
- Ministry of Education, Science and Technology [2010-0015731]
Ionic liquid-modified silica, with functional groups based on imidazole as the cation, was obtained. A molecular imprinting technique was introduced to form the order of functional groups. The selectivity of the obtained ionic liquid-modified silica was successfully used as a special imprinted sorbent in the solid-phase extraction to isolate cryptotanshinone, tanshinone I and tanshinone IIA from Salvia miltiorrhiza Bunge. Several washing and elution solvents with different polarities were evaluated. The ionic liquid-modified silica as the sorbent exhibited a higher selectivity than blank ionic liquid-modified silica, traditional silica and C-18 cartridges. A quantitative analysis was conducted by liquid chromatography with a C-18 column and methanol/water (75:25, v/v, containing 0.5% acetic acid) as the mobile phase. A good linearity was obtained from 0.5 x 10(-4) to 0.1 mg mL(-1) (r (2) > 0.99) with relative standard deviations that were less than 4.6%.
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