本文叙述硫氰酸钠溶剂中甲酸钠的测定方法.该法首先用大孔吸附树脂,去除试样中的部分有机干扰杂质,然后在碱性介质中,以醋酸银为沉淀剂,去除SCN~-、S~(2-)、SO_3~(2-)等离子的干扰,在酒石酸氢钾存在下,于100℃用碘氧化甲酸钠,最后用硫代硫酸钠标准溶液滴定.模拟实验结果表明该法数据重现性好,甲酸钠回收率达96%以上,操作简便,可供腈纶厂控制分析用. This paper describes the method for the determination of sodium formate in sodium thiocyanate solvent.The method first uses macroporous adsorption resin to remove some of the organic interference impurities in the sample and then uses silver acetate as precipitating agent in alkaline medium to remove SCN ~ , S ~ (2 -), SO_3 ~ (2-) ions in the presence of potassium hydrogen tartrate at 100 ℃ with sodium iodate oxidation, and finally with sodium thiosulfate standard solution titration.The simulation results show that the method of data Reproducibility, sodium formate recovery rate of 96% or more, easy to operate, for acrylic fiber plant control analysis.