摘要
提出了浊点萃取分光光度法测定痕量钴的新方法,方法以非离子表面活性剂TritonX-114为萃取剂,以5-Br-PADAP为显色剂对水样中痕量钴(Ⅱ)进行了测定,其最大吸收波长为λ=588nm,摩尔吸光系数为ε=2.776×105L.mol-1.cm-1,检测限为0.0265 ug.mL-1,钴含量在(0～0.35)ug.mL-1范围内服从比尔定律。该法用于水样中微量钴的测定,结果满意。
A new method for the determination of trace amount of cobalt in water by spectrometry after cloud point extraction was proposed. The color reaction of Co with 2- （5-bromo-2-pyrilazo）-5-diethylaminophenol （5-Br-PADAP） was studied with TritonX-114. the maximum wave-length of absorption of complex is 588nm .The apparent molor absorptivity of the complexε =2. 776×10^5L·mol^-1 · cm^-1, Bee＇s law is obeyed in the range of 0-0.35 μ g· mL^-1 for Cobalt. The proposed method has been applied to the determination of the trace Cobalt in water with satisfactory results.
出处
《三明学院学报》
2006年第4期448-451,共4页
Journal of Sanming University
基金
三明学院科学研究基金资助项目(B0502/Q)
关键词
5-BR-PADAP
TritonX-114
分光光度法
浊点萃取
2- （5-bromo-2-pyrilazo）-5-diethylaminophenol （5-Br-PADAP）
TritonX-114, Spoctrophotomotry
Cloud point extraction.
