News Column

Investigators at Xiamen University Describe Findings in Analytical Science

June 13, 2014

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Science are discussed in a new report. According to news reporting from Xiamen, People's Republic of China, by NewsRx journalists, research stated, "An on-line comprehensive two-dimensional preparative liquid chromatography system was developed for preparative separation of minor amount components from complicated natural products. Medium-pressure liquid chromatograph (MPLC) was applied as the first dimension and preparative HPLC as the second one, in conjunction with trapping column and makeup pump."

The news correspondents obtained a quote from the research from Xiamen University, "The performance of the trapping column was evaluated, in terms of column size, dilution ratio and diameter-height ratio, as well as system pressure from the view of medium pressure liquid chromatograph. Satisfactory trapping efficiency can be achieved using a commercially available 15 mm x 30 mm i.d. ODS pre-column. The instrument operation and the performance of this MPLC x preparative HPLC system were illustrated by gram-scale isolation of crude macro-porous resin enriched water extract of Rheum hotaoense."

According to the news reporters, the research concluded: "Automated multi-step preparative separation of 25 compounds, whose structures were identified by MS, H-1 NMR and even by less-sensitive C-13 NMR, could be achieved in a short period of time using this system, exhibiting great advantages in analytical efficiency and sample treatment capacity compared with conventional methods."

For more information on this research see: Two-dimensional preparative liquid chromatography system for preparative separation of minor amount components from complicated natural products. Analytica Chimica Acta, 2014;820():176-186. Analytica Chimica Acta can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Analytica Chimica Acta -

Our news journalists report that additional information may be obtained by contacting Y.K. Qiu, Xiamen University, Key Laboratoty Chem Biol Fujian Prov, Xiamen 361100, People's Republic of China. Additional authors for this research include F.F. Chen, L.L. Zhang, X. Yan, L. Chen, M.J. Fang and Z. Wu (see also Science).

Keywords for this news article include: Asia, Xiamen, Science, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Science Letter

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