METHOD FOR DETERMINING CONTENT OF ACTUAL RESINS IN HYDROCARBON FUELS Russian patent published in 1994 - IPC

FIELD: analytical chemistry. SUBSTANCE: the fixed volume of the test fuel is sampled and the content of actual resins in fuel is then determined. After sampling the fuel, it is applied onto a filter, the fuel impregnated filter is dried, and the filter with actual resins is then dissolved in an acetone-toluene mixture and the optical density of the solution is measured. The content of the resins is determined according to the formula: C_a.r = 32.91 ·D, wherein C_a.r is the concentration of actual resins in fuel, mg per 100 cm³ of fuel. 32.91 is the empirical coefficient; D is the optical density value. EFFECT: greater efficiency of the method. 4 tbl