The method of test is applicable to products having dry residues after evaporation greater than or equal to 10 mg/kg Ä0.001 % (m/m)Ü. The principle consists in evaporation of a test portion on a water bath, and drying the residue, if any, to a constant mass in an oven at 110 °C 2 K. - Cancels and replaces ISO Recommendation R 759-1968 of which it constitutes a technical revision.