摘要
研究了新试剂5(对磺酸基苯偶氮)8羟基喹哪啶(SPHQ)与U(Ⅵ)的显色反应,在pH为7.8的三乙醇胺盐酸缓冲介质中,SPHQ与U(Ⅵ)形成2∶1稳定红色配合物。最大吸收波长位于550nm处,表观摩尔系数为3.07×104L/(mol·cm)。U(Ⅵ)质量浓度在0～1.5mg/L范围内符合比尔定律。铀用TBP萃淋树脂固相萃取柱分离和富集后,用本方法测定环境水样中的微量铀,结果满意。
A new reagent 5-(4-sulfophenylazo)-8-Hydroxylquinadine(SPHQ) is synthesized, and the color reaction of uranium(Ⅵ) with SPHQ is studied. In the medium of buffer solution(pH=7.8), uranium(Ⅵ) reacts with SPHQ to form a stable 1∶2 red complex. The maximum absorption of the complex is at 550 nm and the molar absorptivity is 6.45×10~4 L/(mol·cm). Beer's law is obeyed in the range of 0~1.5 mg/L. The uranium in samples can be enriched and separated by TBP levextrel resin. This method is applied to the determination of trace uranium in water with good results.
出处
《铀矿冶》
CAS
北大核心
2005年第2期95-98,共4页
Uranium Mining and Metallurgy
基金
昆明高等师范专科学校基金资助(2003012)
