[A spectrophotometric method of determining oxyhemoglobin in blood]

A simple method for measuring the relative content of human blood oxyhemoglobin is suggested, not involving the use of toxic reagents. The calculation is made from a newly derived third-degree polynomial reflecting the ratio of the optic densities of whole nonstabilized blood hemoglobin aqueous solution in the 560-580 and 535-560 nm bands.