Selective extraction and enrichment of polyunsaturated fatty acid methyl esters from fish oil by novel π-complexing sorbents

Research on the adsorption property of supported ionic liquids for ferulic acid, caffeic acid and salicylic acid

“…Three kinds of SILs composed of the imidazolium cation had identified and approved by infrared spectroscopy, elemental analysis, and thermogravimetric analysis. The data were in good accordance with literature [12]. While, three kinds of new SILs composed of the quinoline cation were first synthesized in our laboratory with the pertinent literature as reference [12], the structures were characterized by infrared spectroscopy, elemental analysis, and thermogravimetric analysis.…”

Selective extraction of polyunsaturated triacylglycerols using a novel ionic liquid precursor immobilized on a mesoporous complexing adsorbent

“…Less unsaturated triacylglycerols will take longer to displace 1-hexene and bind to silver. Since diethyl ether has the ability to strip saturated fatty acid methyl esters and other weakly bound fatty acid methyl esters, 20 it was attempted to strip a large quantity of 16:0 prior to 1-hexene strip to increase selectivity (Method 3, the predesorption method). Indeed, the analysis of the 1-hexene phase reveals tri-18:3, tri-18:2, a small percentage of tri-18:1 and no trace of tri-16:0.…”

“…42,43 Previously, acetonitrile has worked well for stripping PUFAMEs. 20 However, acetonitrile was only able to strip $30% of the adsorbed unsaturated triacylglycerols. As seen later, the strong interaction between 1,7-octadiene or methanol with the adsorbent prevents effective recycling.…”

“…We previously separated polyunsaturated fatty acid methyl esters using Ag þ immobilized by ionic liquid precursor molecules covalently bonded to silica gel and mesoporous SBA-15. [18][19][20] However, polyunsaturated triacylglycerols are more desirable as dietary supplements than polyunsaturated fatty acid methyl esters. They also require no synthetic transformation.…”

SPE of Tanshinones from Salvia miltiorrhiza Bunge by using Imprinted Functionalized Ionic Liquid-Modified Silica

“…They are receiving great attention in many fields of analytical chemistry [12] such as sample preparation [13], organic synthesis [14][15][16][17], liquid-phase extraction [18,19], and chromatographic separations [20], because they are green reaction media with excellent chemical properties [21,22], Ionic liquid-modified materials had successfully been used in separation work because of their distinctive characteristics [23][24][25]. Some reports have been conducted on the application of these particles as the sorbent to separate some familiar organic compounds [26][27][28] and to isolate active components from natural plants [29], but the selectivity of these materials was not high.…”