An aliquot of brine is acidified with nitric acid and titrated with standard barium chloride solution to a single thermometric endpoint. In concentrated brines, the endpoint is subject to some rounding. For accurate results, it is necessary to determine the method blank on aliquots of a sample brine solution. 瑞士萬通859 溫度滴定儀 瑞士萬通 848 Titrino plus自動(dòng)電位滴定儀 瑞士萬通862多位滴定儀