摘要
合成了新显色剂4-硝基-4'-磺酰胺基苯基重氮氨基偶氮苯(NSADAA),并研究了其在Triton X-100存在下与Hg(Ⅱ)的显色反应。在pH9.0~11.0缓冲范围内,NSADAA与Hg(Ⅱ)形成摩尔比2∶1的红色配合物,其最大吸收波长为518nm,表观摩尔吸光系数ε=1.50×105L·mol-1·cm-1,Hg(Ⅱ)的质量浓度在0~0.8μg/mL范围内遵守比耳定律。方法可用于测定废水中微量Hg(Ⅱ)。
The synthesis of a new chromogenic reagent 4-nitryl-4'-sulphonamidobenzenediazoa-minoazobenzene (NSADAA) and its color reaction with mercury ( Ⅱ) in the presence of triton X-100 was stuidied. The reagent can react with mercury ( Ⅱ) to form a red complex with a molar ratio of 2 : 1 in a medium of pH 9.0 - 11.0. Its apparent molar absorptivity is 1.50 × 10^5L·mol^-1·cm^-1 at the maximum absorption of 518 nm. Beer's law is obeyed in the concentration range of 0 - 0.8 μg/mL for Hg( Ⅱ ). The method has been applied to the determination of trace mercury in waste water with satisfactory results.
出处
《分析试验室》
CAS
CSCD
北大核心
2009年第2期74-77,共4页
Chinese Journal of Analysis Laboratory
基金
河南省科技攻关计划(082102270035)
河南省教育厅科技攻关课题(2008B150001)
安阳师范学院应用化学省级重点学科项目资助