DM141-SC Combined Silver Ring Electrode. UNSPSC Code: 39121436. Combined silver ring electrode for argentometric precipitation titrations of halides, sulfides, hydrogen sulfide, mercaptanes and cyanides with change of the pH value in aqueous medium. Application examples:Salt content (rock salt, NaCl) in ketchup, food, vegetable juices - Sulphide content of green and black liquor in the pulp and paper industry -Silver content of silver alloys