Separation of open-cage fullerenes using nonaqueous capillary electrophoresis

Hsiu Li Su, Wan Chun Kao, Cheng yu Lee, Shih-Ching Chuang, You-Zung Hsieh*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this study, nonaqueous capillary electrophoresis (NACE) was used to separate three open-cage fullerenes. Trifluoroacetic acid (TFA) was used as the nonaqueous background electrolyte to change the analytes' mobilities. The selectivity and separation efficiency were critically affected by the nature of the buffer system, the choice of organic solvent, and the concentrations of TFA and sodium acetate (NaOAc) in the background electrolyte. The optimized separation occurred using 200. mM TFA/20. mM NaOAc in MeOH/acetonitrile (10:90, v/v), providing highly efficient baseline separation of the open-cage fullerenes within 5. min. The migration time repeatability for the three analytes was less than 1% (relative standard deviation). Thus, NACE is a rapid, useful alternative to high-performance liquid chromatography for the separation of open-cage fullerenes.

Original languageEnglish
Pages (from-to)4471-4475
Number of pages5
JournalJournal of Chromatography A
Issue number26
StatePublished - 25 Jun 2010


  • Nonaqueous capillary electrophoresis
  • Open-cage fullerene
  • Trifluoroacetic acid


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