Separation of six xanthones from Swertia franchetiana by high-speed countercurrent chromatography.
Sign Up to like & getrecommendations! Published in 2017 at "Journal of separation science"
DOI: 10.1002/jssc.201601134
Abstract: In our present study, two groups of xanthones isomers (1-hydroxy-3,5,8-trimethoxyxanthone and 1-hydroxy-3,7,8-trimethoxyxanthone; 1,8-dihydroxy-3,7-dimethoxyxanthone and 1,8-dihydroxy-3,5-dimethanolxanthone) and other two xanthones (3-methoxy-1,5,8-trihydroxyxanthone and 3,5-dimethoxy-1-hydroxyxanthone) were separated from Swertia franchetiana. First, a solvent system composed of petroleum ether/methanol/water… read more here.
Keywords: speed countercurrent; separation; countercurrent chromatography; high speed ... See more keywords
Enantioseparation of 3-phenyllactic acid by chiral ligand exchange countercurrent chromatography.
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DOI: 10.1002/jssc.201601384
Abstract: 3-Phenyllactic acid is an antimicrobial compound with broad-spectrum activity against various bacteria and fungus. The observed difference in pharmacological activity between optical isomeric 3-phenyllactic acid necessitates a method for enantioseparation. Chiral ligand exchange countercurrent chromatography… read more here.
Keywords: phenyllactic acid; countercurrent chromatography; chiral ligand;
Enantioseparation of pheniramine enantiomers by high-speed countercurrent chromatography using β-cyclodextrin derivatives as a chiral selector.
Sign Up to like & getrecommendations! Published in 2017 at "Journal of separation science"
DOI: 10.1002/jssc.201700345
Abstract: The enantioselective separation of pheniramine was studied by a high-speed countercurrent chromatography method using β-cyclodextrin derivatives as a chiral selector. Several key variables, for instance, type of organic solvent and chiral selector, concentration of chiral… read more here.
Keywords: chromatography; chiral selector; speed countercurrent; countercurrent chromatography ... See more keywords
Silver ion coordination countercurrent chromatography: Separation of β-elemene from the volatile oil of Curcumae Rhizoma.
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DOI: 10.1002/jssc.201700399
Abstract: In this work, the antitumor constituent β-elemene was selectively separated from the volatile oil of the Curcumae Rhizoma by countercurrent chromatography with silver nitrate as selective reagent based on the formation of coordination complexes. A… read more here.
Keywords: chromatography; silver; countercurrent chromatography; volatile oil ... See more keywords
Isolation and purification of alkaloids from lotus leaves by ionic-liquid-modified high-speed countercurrent chromatography.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of separation science"
DOI: 10.1002/jssc.201700851
Abstract: An effective high-speed countercurrent chromatography method was successfully established by using ionic liquids as the modifier of the two-phase solvent system. Adding a small amount of ionic liquids significantly shortens the separation time and improves… read more here.
Keywords: lotus leaves; speed countercurrent; countercurrent chromatography; high speed ... See more keywords
Chiral ligand exchange countercurrent chromatography: Enantioseparation of amino acids.
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DOI: 10.1002/jssc.201701117
Abstract: This work deals with the enantioseparation of α-amino acids by chiral ligand exchange high-speed countercurrent chromatography using N-n-dodecyl-l-hydroxyproline as a chiral ligand and copper(II) as a transition metal ion. A biphasic solvent system composed of… read more here.
Keywords: chromatography; amino acids; enantioseparation amino; countercurrent chromatography ... See more keywords
Separation of five naphtho-γ-pyrones from Pleurotus ostreatus by high-speed countercurrent chromatography.
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DOI: 10.1002/jssc.201800733
Abstract: A method to optimize a high-speed countercurrent chromatography solvent system from many possible solvent systems was guided by average polarity and K values of crude samples, which was successfully applied in separation of the naphtho-γ-pyrones.… read more here.
Keywords: speed countercurrent; separation; countercurrent chromatography; high speed ... See more keywords
Enantioseparation of 2-(4-chlorophenyl)succinic acid by countercurrent chromatography and investigation of injection volume on resolution.
Sign Up to like & getrecommendations! Published in 2020 at "Journal of separation science"
DOI: 10.1002/jssc.202000860
Abstract: 2-(4-chlorophenyl) succinic acid was successfully enantioseparated by countercurrent chromatography using hydroxypropyl-β-cyclodextrin as chiral selector. A two-phase solvent system composed of n-hexane-ethyl acetate-0.1 mol/L phosphate buffer with pH 2.65 (5:5:10, v/v/v) was selected. Enantioselective liquid-liquid extraction… read more here.
Keywords: chlorophenyl succinic; succinic acid; volume; countercurrent chromatography ... See more keywords
Preparative separation of two isomeric antimalaria alkaloids febrifugine and isofebrifugine from Dichroa febrifuga roots by countercurrent chromatography.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of separation science"
DOI: 10.1002/jssc.202001257
Abstract: Two antimalaria alkaloids, febrifugine and isofebrifugine, were successfully separated from total alkaloids of Dichroa febrifuga roots by one-step preparative countercurrent chromatography with a selected biphasic solvent system. The selected biphasic solvent system was composed of… read more here.
Keywords: chromatography; alkaloids febrifugine; dichroa febrifuga; countercurrent chromatography ... See more keywords
The Generally Useful Estimate of Solvent Systems method facilitates off-line two-dimensional countercurrent chromatography for isolating compositions from Siraitia grosvenorii roots.
Sign Up to like & getrecommendations! Published in 2022 at "Journal of separation science"
DOI: 10.1002/jssc.202200708
Abstract: Solvent system selection is a crucial and the most time-consuming step for successful countercurrent chromatography separation. A thin-layer chromatography based generally useful estimate of solvent systems method has been developed to simplify the solvent system… read more here.
Keywords: countercurrent chromatography; dimensional countercurrent; solvent; countercurrent ... See more keywords
Biphasic alcoholysis coupled with high speed countercurrent chromatography for high performance on separating phorbol from Croton tiglium Linn extracts.
Sign Up to like & getrecommendations! Published in 2023 at "Journal of separation science"
DOI: 10.1002/jssc.202200984
Abstract: Phorbol is a tetracyclic diterpenoid found in Euphorbia tirucalli, Croton tiglium, and Rehmannia glutinosa, and is a nuclear of various phorbol esters. The rapid obtaining of phorbol with high purity highly contributes to its application, such as synthesizing… read more here.
Keywords: high speed; countercurrent chromatography; alcoholysis; biphasic alcoholysis ... See more keywords