DETERMINATION OF CHEMICAL ACTIVITY OF ORGANIC SUBSTANCES IN REFERENCE TO IRON COMPOUNDS IN AQUEOUS SOLUTIONS Russian patent published in 2006 - IPC G01N33/18 G01N17/00 

FIELD: chemistry, water quality control, method for quantitative estimation of organic substance properties in aqueous solutions.

SUBSTANCE: indicator plate is immersed in aqueous solution and according to alteration of aqueous solution composition chemical activity of organic substances in this solution is determined. In clamed method tree vessels are used. Two vessels contain aqueous solution to be tested and the third vessel contains control aqueous solution free from organic contamination. In aqueous solutions containing in the second and third vessels indicator plates are immersed, then aqueous solutions in all vessels are heated up to 95-105°C, held at this temperature for 55-65 min, cooled to 15-25°C, filtered though membrane filter with pore size of 0.46 mum, then iron content is measured in all vessels and chemical activity of organic substances in aqueous solutions is calculated according to equation k_a=ΔFe/Fe₁, wherein ΔFe = Fe₂- Fe₁- Fe₃; Fe₁ is iron content in the aqueous solution of the first vessel; Fe₂ is iron content in the tested aqueous solution of the second vessel; and Fe₃ is iron content in the aqueous solution of the third vessel.

EFFECT: simplified method with enhanced functionality.

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