The principle of the method specified is to distil a prepared flux solution with sodium hydroxide to expel the ammonia present in the flux, to pass the resulting distillate into a standard sulfuric acid solution, to titrate the excess acid with sodium hydroxide solution and to calculate the ammonia content of the flux. Applies to fluxes of class 3.1.1 only, as defined in ISO 9454-1.
Document identifier
ISO 9455-9:1993
Title
Soft soldering fluxes - Test methods - Part 9: Determination of ammonia content
ISO Category
TC 44/SC 12: Soldering materials
Publication date
1993-04-01
International Relationship
BS EN ISO 9455-9:1996 * BS EN ISO 9455-9:1996
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