METHOD OF DETERMINING FREE-RADICAL ACTIVITY OF SOLID MATERIALS Russian patent published in 2014 - IPC G01N1/00 G01N33/00 

FIELD: chemistry.

SUBSTANCE: method includes the selection and preparation of samples to be analysed, selection of specified volumes of solutions of a test system components, placement of the samples to be analysed and the test system components into a cuvette, registration of chemiluminiscence with further quantitative estimation of its value with taking into account the background signal of chemiluminiscence. The weight of porting of the sample of the material to be analysed is taken such that corresponds to the value of a specific surface 0.20±0.05 m²/g, and in case when it is not possible to determine the value of the specific surface of the sample to be tested, the weight of the taken portion is 0.010±0.005 g. The portion of the sample of the material to be analysed is placed into a cuvette with the further successive addition of the test system components: 0.01M solution of luminal in 0.5 NaOH solution and a solution of hydrogen peroxide of a 20-30% concentration to fill the working space in the cuvette, keeping the ratio luminal:hydrogen peroxide equal to 2:5. After that, values of chemiluminiscence are registered for 125 minutes and the total value of chemiluminiscence is calculated.

EFFECT: identification of the free-radical activity of solid materials by the method of the chemiluminiscence registration by means of the system of chemical reagents without the application of biological substrates in the test system.

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