METHOD FOR ASSAY OF BLOOD PLASMA DENSITY Russian patent published in 2005 - IPC

FIELD: medicine.

SUBSTANCE: invention relates to laboratory methods for blood analysis. Plasma is dropped in copper sulfate solution with density 1.023 g/cm³, not above, and time for drop falling on bottom of graduated cylinder with column height 243 mm is measured. The blood plasma density value is calculated by the formula:

wherein is the unknown blood plasma density (g/cm³); is copper sulfate solution density measured by areometer (g/cm³); t is average falling time of plasma drop in the copper sulfate solution (as seconds); 0.260130126 and 0.00290695 are correction coefficients. Temperature of plasma and copper sulfate solution is 20^oC. Method is simple and suitable and allows carrying out analysis of small volumes of blood plasma and to reduce analysis time.

EFFECT: improved assay method.

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