摘要
研究了TB -偶氮胂与锶、钡的显色反应 ,实验结果表明 ,该络合反应在pH 0 .2~ 2 .5酸度范围内具有较好的灵敏度 (εSr =4 .5× 1 0 4L·mol- 1 ·cm- 1 和εBa =4 .3× 1 0 4L·mol- 1 ·cm- 1 ) ,反应酸度范围宽 (pH 0 .2~2 .5 )且两者最大吸收波长具有明显差异 ,可用双波长分光光度法同时测定Sr2 +、Ba2 +.该方法用于某些纯试剂中Sr、Ba的同时测定 。
The color reaction of strontium,barium with TB-arsenazo has been studied.The reaction has good sensitivity(ε Sr =4.5×10 4L·mol -1·cm -1,ε Ba =4.3×10 4L·mol -1·cm -1),and the apparent absorption of the two complexes are obviously different,so this method can be used to determinate Sr,Ba by TB-arsenazo dual-wavelength spectrophotometry.The method can also be employed to determinate Sr 2+ aod Ba 2+ in some pure reagents simultaneously.
出处
《湖北大学学报(自然科学版)》
CAS
2002年第1期49-51,共3页
Journal of Hubei University:Natural Science
基金
湖北大学教学研究项目基金资助