solution the dry residue of this aqueous solution measured after evaporation at 110 u00b0 c is 23 mg kg its conductivity is 40 u03bcs cm and its ph is 3 1 the use of this aqueous solution leads to a blocking of the spraying system at the end of about 35 hours under these conditions it is necessary to clean the spraying system once every 24 hours example 1 was reproduced with an aqueous hydrogen peroxide solution similarly distilled but stabilized with 18 mg kg of sodium pyrophosphate acid and 2 2 mg kg of a 40 aqueous solution of sodium stannate the ph of the solution is 3 1 the use of this solution leads to a blocking of the spraying system at the end of about 45 hours which requires that the system be cleaned once every 24 hours example 1 was reproduced with a solution of hydrogen peroxide solution similarly distilled to 35 but stabilized with 1 hydroxyethylene 1 1 diphosphonic acid ahep at a concentration of 26 mg kg the dry residue of this stabilized solution measured after evaporation at 110 u00b0 c is 25 mg kg and its ph is 2 6 after more than a week of use no blockage of the spraying system was observed when the spraying system was cleaned by means of classical cleaning agents it was observed that the cleaning was easier with the hydrogen peroxide solution stabilized with 26 mg kg of ahep than with 26 mg kg of atmp solution of example 1 it is understood here that by 34 easier cleaning.