丙醇-硫酸铵-1-(2-吡啶偶氮)-2-萘酚双水相萃取铅(Ⅱ)  

Extraction of Lead by Propyl Alcohol-Ammonium Sulfate-PAN Aqueous Two-Phase

作　　者：董红敏[1] 沈亮亮[1] 张树贵[1] 陈腾[1] 覃事栋[1] 

机构地区：[1]吉首大学化学化工学院

出　　处：《光谱实验室》2013年第6期2979-2983,共5页Chinese Journal of Spectroscopy Laboratory

基　　金：吉首大学校级科研项目资助(JGY201315)

摘　　要：研究了丙醇-硫酸铵双水相体系中Pb(Ⅱ)的萃取行为。实验表明:铅-碘化钾-PA N形成的离子缔合物容易被萃取到丙醇相中,在pH 4.4且无PAN时,双水相体系对[PbI4]2-络阴离子的萃取率为0;加入PAN后,该体系几乎能完全萃取体系中的离子缔合物。该稳定缔合物的最大吸收波长为486nm,表观摩尔吸光系数为1.47×105L·mol-1·cm-1,相关系数r为0.9989,铅(Ⅱ)的质量浓度在0—1.4Lg/10mL呈线性关系。The extraction behavior of Pb（ Ⅱ ） is studied in aqueous two-phase system of propyl alcohol-ammonium sulfate aqueous. Experiments showed .that the ion associated complex of lead-potassium iodide-PAN is extracted easily by propyl alcohol phase. The extractive rate of the [PbI4]^2- complex is zero in aqueous two-phase system without PAN at pH 4. 4, and the ion association was almost completely extracted at the PAN medium. The maximum absorption wavelength of the stable association complex is 486nm,and the apparent molar absorption coefficient is 1.47×105L·mol-1·cm^-1 and the correlation coefficient is 0. 9989. Ph（ Ⅱ ） has a linear relationship in the range of 0-1.4μg/10mL.

关 键 词：铅 双水相萃取 分光光度法 缔合物 

分 类 号：O657.32[理学—分析化学]