Simplified determination of carboxyhemoglobin

Area of Science:

• Clinical Chemistry
• Analytical Chemistry

Background:

• Accurate quantification of carboxyhemoglobin is crucial for diagnosing carbon monoxide poisoning.
• Existing spectrophotometric methods may require specific handling or lack stability.

Purpose of the Study:

• To develop and validate a robust spectrophotometric method for carboxyhemoglobin estimation.
• To simplify the procedure by eliminating the need for air exclusion.

Main Methods:

• Spectrophotometric analysis of a two-pigment mixture.
• Reduction of oxyhemoglobin and methemoglobin using sodium hydrosulfite.
• Absorbance measurements at 420 nm and 432 nm with pH 6.85 buffering.

Main Results:

• The method produces stable and reproducible absorbance values.
• Protection against air exposure was found to be unnecessary.
• The spectrophotometric assay provides reliable carboxyhemoglobin quantification.

Conclusions:

• This spectrophotometric method offers a stable, reproducible, and simplified approach for carboxyhemoglobin measurement.
• The technique is suitable for routine clinical and laboratory use.
• Elimination of air protection enhances practicality.