摘要
采用2.25mmol/L邻苯二甲酸氢钾为流动相,以单柱阴离子包谱法测定痕量硫,硫的检出限达3μg/L;详细研究了氧化铝柱分离条件,实现了钢铁中痕量硫与基体快速分离并定量回收,消除了酸溶路线中大量杂质离子的干扰及重金属离子对色谱柱的危害,研究了不同基体对痕量硫测定的干扰情况及消除方法,建立了氧化铝柱预分离-IC法测定钢铁中痕量硫的新方法.该方法的检出限为0.000098%.
A new method for the determination of trace sulfur in iron and steel by using ion chromatography combined with alumina column preseparation has been developed. SO42- was determined by using single-column ion chromatography with 2.25 mmol/L potassium hydrogenphthalate as eluent.andthe detection limit of sulfur was 3μg/L. The optimum conditions for alumina column preseparation havebeen investigated in details. Trace sulfur detection limit was 0.000098 % could be separated from matrix quantitatively and rapidly, and the interference of 14 different matrices was examined. The effect of heavy metal ions in samples on the column of ion chromatography was eliminated. The developed method has been applied to determine trace sulfur in iron and steel samples successfully.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第11期1313-1316,共4页
Chinese Journal of Analytical Chemistry
关键词
离子色谱法
钢铁
硫
测定
Ion chromatography, iron, steel, trace analysis, sulfur
