Karlmark, B An ultramicro method for the separate titration of hydrogen and ammonium ions. [electronic resource] - Pflugers Archiv : European journal of physiology 1971 - 361-5 p. digital Publication Type: Journal Article ISSN: 0031-6768 Standard No.: 10.1007/BF00592406 doi Subjects--Topical Terms: Ammonium Chloride--analysisHydrogen-Ion ConcentrationHydroxides--analysisMethodsMicrochemistry