Hyperlayer separation in hollow fiber flow field-flow fractionation: Effect of membrane materials on resolution and selectivity

Byung Ryul Min, Seok Jin Kim, Kyu Hong Ahn, Myeong Hee Moon

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Hollow fiber flow FFF (HF FlFFF) has recently shown its capability to separate and characterize the size of submicrometer particles and has demonstrated the potential to be developed into a disposable flow FFF channel. In this work, HF FlFFF was used for the hyperlayer separation of micron-sized particles and the separation capability was examined by using various hollow fiber membrane materials (Polysulfones, cPVC, and PAN). From the experiments, PAN (polyacrylonitriles) showed an outstanding performance in particle separation compared to the other membranes. By orienting the fiber module in an upright direction, the upstream flow migration reduced band broadening of eluted peaks. When the efficiency of the PAN hollow fiber system was tested by varying the ratio of outflow-rate to radial flow-rate, it was found that optimum separation in hyperlayer HF FlFFF can be obtained at the ratio of about 6-7. From the examination of retention at or around steric inversion diameter, it was observed that experiments showed a good agreement with predictions by semi-empirical calculation. In hyperlayer HF FlFFF the diameter based selectivity values were shown to be 1.2-1.7 depending on the type of membranes and the field strength (the radial flow-rate) conditions.

Original languageEnglish
Pages (from-to)175-182
Number of pages8
JournalJournal of Chromatography A
Volume950
Issue number1-2
DOIs
Publication statusPublished - 2002 Mar 15

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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