SUMMARY — Reflectance spectrophotometry was used to study pigment changes in beef samples that (1) had been oxygenated and wrapped with an oxygen‐impermeable film, (2) had been treated with ferricyanide and (3) had either treatment (1) or (2) plus malonic acid. Treatment (1) showed a metmyoglobin (MetMb) accumulation of 30% in 30 min, followed by reduction of MetMb. Malonic acid inhibited oxygen utilization and MetMb‐reducing activity (MRA). Treatment (2) showed MRA that was inhibited by the presence of oxygen or malonic acid. Malonic acid inhibited oxygen utilization rather than directly inhibiting MRA.
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Zimmerman et al. (1969) studied this question.
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