关键词: 碳酸锶, 硫, 电弧燃烧

Abstract: Determination method of total sulfur content in strontium carbonate by carbon and sulfur analyzer was introduced.Sulfurs of each valence state in the sample were all oxidized to SO₂ by high-temperature automatic arc striking in an electric arc induction furnace in the presence of flux (special silicon molybdenum powder,tin grains and pure iron) and oxygen.SO₂ would be absorbed by absorption liquid to form H₂SO₃,and then light-controlled automatic titration of SO₃^2- with iodine-starch standard solution was carried out,and finally total sulfur content could be calculated according to the consumption of standard solution.This method has advantages of convenience,simplicity,good repeatability,and high precision,whose relative standard deviation is less than 0.5% and standard sample recovery rate is more than 95%. 

Key words: strontium carbonate, sulfur, electric arc induction combustion