UNE 55539-3
SURFACE ACTIVE AGENTS. METHODS FOR PREPARATION, STANDARDIZATION AND STORAGE OF STANDARD SOLUTIONS TO BE USED IN VOLUMETRIC ANALYSIS OF SURFACE ACTIVE AGENTS AND FORMULATIONS CONTAINING THEM. PART 3: SOLUTIONS OF HYDROCHLORIC ACID, OF CONCENTRATIONS BETWEEN 0,02 MOL/L AND 1,0 MOL/L.