Improvement of lipoprotein separation with a guard channel prior to asymmetrical flow field-flow fractionation using fluorescence detection

Ju Yong Lee, Donghoon Choi, Christoph Johan, Myeong Hee Moon

Research output: Contribution to journalArticle

11 Citations (Scopus)


In this article, a simple experimental approach to improve lipoprotein separation and detection in flow field-flow fractionation (FlFFF) is detailed. Lipoproteins are globular particles composed of lipids and proteins in blood serum and their roles include transferring fats and cholesterols through blood vessels throughout the body. Especially, presence of small, dense low-density lipoproteins (LDL) is associated with cardiovascular risk. Two experimental approaches were explored in this study: an increase in the reproducibility of LDL particle separation by implementing a guard channel prior to an asymmetrical FlFFF (AFlFFF) channel in order to deplete small molecular weight serum proteins and reducing the required injection volume of a serum sample by implementing fluorescence detection. The guard channel was made of a simple hollow fiber module so that the serum sample can be washed with the help of radial flow prior to injection into the AFlFFF channel. The channel was tested with protein standards and serum samples to ensure precision of the retention time and the protein recovery rate. A fluorescent phospholipid dye was utilized to label lipoprotein particles before separation for fluorescence detection, which resulted in a reduction of the required injection volume of serum.

Original languageEnglish
Pages (from-to)4144-4148
Number of pages5
JournalJournal of Chromatography A
Issue number27
Publication statusPublished - 2011 Jul 8


All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

Cite this