[Ferricyanide method of testing hemoglobin preparations]

Area of Science:

• Biochemistry
• Chemical Kinetics

Context:

• Oxyhemoglobin is crucial for oxygen transport.
• Understanding oxyhemoglobin's stability and oxidation is vital for physiological and pathological studies.

Purpose:

• To investigate the effect of potassium chloride on oxyhemoglobin oxidation kinetics.
• To evaluate the potential of ferricyanide oxidation as an indicator of oxyhemoglobin's autooxidation predisposition.

Summary:

• Low concentrations of potassium chloride were found to similarly alter the rate constants for both oxyhemoglobin autooxidation and its oxidation by ferricyanide in tris-buffer.
• This parallel change suggests a mechanistic link between the two processes.

Impact:

• The study proposes that the rate constant of oxyhemoglobin oxidation by ferricyanide can be utilized as a diagnostic test for the overall state of oxyhemoglobin in solution.
• This finding offers a new method for assessing oxyhemoglobin's susceptibility to autooxidation.