METHOD OF DETERMINING CONTENT OF ALKALI METAL FORMATES IN DEICING AGENTS Russian patent published in 2013 - IPC G01N31/16 

FIELD: chemistry.

SUBSTANCE: aqueous solution of an analysed sample of a deicing agent containing 1-50 wt % alkali metal formates is mixed with alkaline bromine solution with bromine concentration of 0.1 mol/dm³ in amount of 0.02-0.08 wt % of the weight of the formate; glacial aceit acid is added until pH drops to less 1; the mixture is held at room temperature; further, potassium iodide solution is added and then titrated with a pentahydrate solution of sodium thiosulphate; aqueous starch solution is then added and titrated until the solution becomes clear. Optimum conditions for carrying out the method are as follows: 15-25°C, relative humidity of 45-80% and atmospheric pressure of 630-800 mm Hg.

EFFECT: improved method.

4 cl, 1 tbl, 1 ex