铬酸钡分光光度法、硫酸钡重量法[1]是测定食盐中硫酸盐含量的经典方法,此方法测定结果准确可靠,但操作较繁,分析速度慢。笔者基于HCrO4-与被测Ba2+发生沉淀反应置换出等摩尔的H+再用NaOH标准溶液滴定,从而建立了在不分离沉淀的情况下利用酸碱滴定法间接测定硫酸盐含量的方法[2 Barium chromate spectrophotometry, barium sulfate gravimetric method [1] is a classic method for the determination of sulphate in salt. The method is accurate and reliable, but the operation is complicated and the analysis speed is slow. The author based on the reaction of HCrO4- with Ba2 + precipitation reaction to replace equimolar H + and titration with NaOH standard solution, thus establishing a method of indirect determination of sulfate content by acid-base titration without separating precipitation [2