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Ascorbic acid (AA) degrades rapidly in most biological media like cell culture solutions and artificial cerebrospinal fluid. However, it remains stable in physiological saline, which is crucial for reliable biological research.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Neuroscience

Background:

  • Ascorbic acid (AA) is vital for physiological and pathological processes.
  • Understanding AA stability in biological media is critical for research accuracy.

Purpose of the Study:

  • To systematically investigate and quantify ascorbic acid stability across various biological media.
  • To provide essential data for optimizing experimental conditions in biological research.

Main Methods:

  • Development of sensing methods for precise AA concentration measurement.
  • Comparative analysis of AA degradation rates in diverse media over specified timeframes.

Main Results:

  • Significant AA degradation observed in phosphate-buffered saline (PBS), Hank's balanced salt solution (HBSS), Dulbecco's Modified Eagle's Medium (DMEM), and Roswell Park Memorial Institute (RPMI) 1640 medium.
  • Rapid AA loss in artificial cerebrospinal fluid (aCSF) and brain slice incubation solution (BSIS).
  • Minimal AA degradation (<2% loss over 72h) in physiological saline (0.9% saline).

Conclusions:

  • Ascorbic acid exhibits poor stability in commonly used biological solutions, necessitating careful consideration for experimental design.
  • Physiological saline is a suitable medium for maintaining ascorbic acid integrity in biological experiments.
  • This study offers critical guidance for the appropriate use of ascorbic acid in diverse research settings.