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Related Experiment Videos

Double fluorescent labeling method used for a study on liposomes.

H Sawahara1, S Goto, N Kinoshita

  • 1Faculty of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.

Chemical & Pharmaceutical Bulletin
|January 1, 1991
PubMed
Summary

Carboxyfluorescein (CF) and Calcein (CAL) can be distinguished using cobalt ions (Co2+). This method enables precise fractional determination of CF and CAL, crucial for liposome studies.

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Materials Science

Background:

  • Carboxyfluorescein (CF) and Calcein (CAL) are spectrally similar fluorescent dyes.
  • Distinguishing between CF and CAL is challenging due to overlapping fluorescence spectra.

Purpose of the Study:

  • To develop a method for the fractional determination of CF and CAL.
  • To leverage this method for applications in liposome research.

Main Methods:

  • Utilizing the selective formation of a nonfluorescent chelate between Calcein (CAL) and cobalt ions (Co2+).
  • Employing differential fluorescence spectroscopy to quantify CF and CAL.

Main Results:

  • Demonstrated that only CAL forms a nonfluorescent chelate with Co2+.

Related Experiment Videos

  • Successfully achieved fractional determination of CF and CAL mixtures.
  • Validated the method's applicability for analyzing liposomes.

    • Conclusions:

    • The selective chelation of CAL by Co2+ provides a reliable basis for differentiating CF and CAL.
    • This novel method enhances the accuracy of quantitative analysis in liposome formulations.
    • The technique offers a valuable tool for researchers studying liposome dynamics and composition.