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Reference type: Journal
Authors: Tian M, Row KH
Article Title: SPE of Tanshinones from Salvia miltiorrhiza Bunge by using Imprinted Functionalized Ionic Liquid-Modified Silica.
Publication date: 2011
Journal: Chromatographia
Volume: 73
Issue: (1-2)
Page numbers: 25-31.
DOI: 10.1007/s10337-010-1836-y
Alternative URL: http://www.springerlink.com/content/h42l4t50323h3122/

Abstract: 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 C18 cartridges. A quantitative analysis was conducted by liquid chromatography with a C18 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 10-4 to 0.1 mg mL-1 (r 2 > 0.99) with relative standard deviations that were less than 4.6%.
Template and target information: cryptotanshinone, tanshinone I, tanshinoneIIA
Author keywords: column liquid chromatography, Solid-phase extraction, Molecular imprinted ionic liquid-modified silica, Tanshinones, Salvia miltiorrhiza Bunge


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