HIGH SPEED CENTRIFUGAL COUNTERCURRENT CHROMATOGRAPHY (HSCCC) ISOLATION AND IDENTIFICATION BY LC-MSn ANALYSIS OF THE POLAR PHENOLICS FROM VASCONCELLEA QUERCIFOLIA
نویسندگان
چکیده
منابع مشابه
Countercurrent Chromatography and High Speed Countercurrent Chromatography: Instrumentation
Engelsma M, KokWT and Smit HC (1990) Selective determination of trace levels of phenol in river water using electrochemical concentration modulation. Journal of Chromatography 506: 201}210. Fister JC, Jacobson C and RamseyM (1999) Ultra sensitive cross correlation electrophoresis on microdevices. Analytical Chemistry 71: 4460}4464. Kaljurand M and KuK llik E (1989) Computerized Multiple Input C...
متن کاملPreparative Isolation and Purification of Two Coumarins from Edgeworthia chrysantha Lindl by High Speed Countercurrent Chromatography
Two bioactive coumarins including 7-hydroxycoumarin (umbelliferone) and 7-hydroxyl-6-methoxy-3, 70-dicoumarylether (daphnoretin) were separated from the ethyl acetate extract of the stems of Edgeworthia chrysantha Lindl (E. papyrifera) by high speed countercurrent chromatography (HSCCC). The two-phase solvent system used was composed of n-hexane-ethyl acetate–methanol–water at an optimized volu...
متن کاملHigh Speed Countercurrent Chromatography See III /MEDICINAL HERB COMPOUNDS: HIGH SPEED COUNTERCURRENT CHROMATOGRAPHY
and displayed in real time and can be stored for record purposes. Looking to the future, it is reasonable to expect continued evolutionary development: new selective detectors, more complex analysers for automated sample processing, increasing use of coupled techniques, columns with immobilized phases of a wider range of selectivity, etc. It is hoped that further research and development will e...
متن کاملEnrichment and determination of zinc by high-speed countercurrent chromatography.
The capability of high-speed countercurrent chromatography (HSCCC) has been investigated for enrichment and determination of metal ions at trace levels. Separation of selected divalent metal ions was performed using a small coiled column. A hexane solution of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPA) was employed as the stationary phase. Loaded divalent metal ions such as Ni, C...
متن کاملMedicinal Herb Compounds: High-speed Countercurrent Chromatography
San Francisco: W. Freeman Publishers. Miller BV and Lines R (1988) Recent advances in particle size measurement: a critical review. Critical Reviews in Analytical Chemistry 20(2): 75}116. Oglesby S Jr and Nichols GB (1978)Electrostatic Precipitation. New York: Marcel Dekker Inc. Provder T (ed.) (1998) Particle Size Distribution III, Assessment and Characterization.ACS Symposium Series 693, ACS....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Chilean Chemical Society
سال: 2013
ISSN: 0717-9707
DOI: 10.4067/s0717-97072013000300007