KINETIC METHOD FOR TESTING ANTI-OXIDANTS Russian patent published in 2008 - IPC G01N7/18 G01N31/00 G01N33/00 

FIELD: chemistry, various oxygen-containing substances and compounds, possible use in good technology, perfume industry, biology, pharmacology, medicine.

SUBSTANCE: in the kinetic method for testing anti-oxidants by saturating a sample of ethers of high non-saturated fatty acids and anti-oxidants with oxygen with stirring thereof at 60,0±0,2°C and creation of chains of their oxidized radicals, determining of amount of absorbed oxygen in time with construction of dV/dt graph in time, the sample of ethers of non-saturated fatty acids is mixed with water solutions of cetyltrimethylammonium of bromide and copper salt, a batch or solution of anti-oxidant is added, resulting sample is finished with water up to 4 ml, saturated with oxygen, the volume of oxygen absorbed over time is determined volumetrically, dV/dt graph is built in time on basis of differentiation of resulting kinetic curves, approximated across three sections: first and third ones - by straight lines, second one - by a parabola, on basis of which the time, corresponding to first bend, is used to determine efficiency of participation of anti-oxidant in tearing of chains, the tangent of angle of inclination of tangent line of second section is used to determine participation of antioxidant in branching on chains, and time of second bend is used to determine full flow of antioxidant, where the dV/dt value of the fourth section defines the total speed of the process.

EFFECT: increased efficiency of testing.

4 ex, 1 tbl, 5 dwg