On-chip microfluidic sorting with fluorescence spectrum detection and multiway separation

Lab Chip. 2009 May 7;9(9):1254-60. doi: 10.1039/b815765k. Epub 2009 Feb 13.


The microfluidic platform is an important tool for diagnosis and biomedical studies because it enables us to handle precious cells and infectious materials safely. We have developed an on-chip microfluidic sorter with fluorescence spectrum detection and multiway separation. The fluorescence spectrum of specimens (495-685 nm) in the microchannels was obtained every 2 ms using a 1 x 16 arrayed photomultiplier tube. The specimen was identified by its spectrum and collected into the corresponding channel based on our previously reported thermoreversible gelation polymer technique (Y. Shirasaki, J. Tanaka, H. Makazu, K. Tashiro, S. Shoji, S. Tsukita and T. Funatsu, Anal. Chem., 2006, 78, 695-701). Four kinds of fluorescence microspheres and three kinds of Escherichia coli cells, expressing different fluorescent proteins, were successfully separated with accuracy and purity better than 90% at a throughput of about one particle per second.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Separation / instrumentation*
  • Equipment Design
  • Equipment Failure Analysis
  • Escherichia coli / isolation & purification*
  • Flow Cytometry / instrumentation*
  • Microfluidic Analytical Techniques / instrumentation*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrometry, Fluorescence / instrumentation*