FIELD: chemistry.
SUBSTANCE: invention relates to biochemistry. Disclosed is a peroxidase enzymatic activity stabiliser. The stabiliser is in form of cobalt ferrospinel nanoparticles, components of which vary in the interval Co0.7±0.05Fe2.3±0.05O4-Co1±0.05Fe2±0.05O4, which are suspended in a sodium phosphate buffer solution with concentration of 0.01-10 mg/ml.
EFFECT: maintenance of 40-42% enzymatic activity of peroxidase for 105-255 days with given magnetisation intensity of cobalt ferrospinel particles.
2 tbl
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