聚乙二醇-硫酸铵双水相萃取次甲基蓝的研究  

Study on extraction of methylene blue in PEG /ammonium sulfate two-phase aqueous systems

作　　者：巩育军[1] 刘杰凤[1] 欧飞国 

机构地区：[1]广东石油化工学院化学学院,广东茂名525000

出　　处：《化学研究与应用》2012年第4期594-597,共4页Chemical Research and Application

基　　金：广东省科技计划项目(2010B031700011))

摘　　要：利用分光光度法研究了次甲基蓝在聚乙二醇-硫酸铵双水相体系的萃取行为,探索了质量配比(mPEG/m(NH4)2SO4)、温度和次甲基蓝的浓度对双水相及次甲基蓝萃取率(Y)的影响。实验表明:(1)在一定的温度和浓度下,随着mPEG/m(NH4)2SO4的减小,分配系数K(cup/clow)增加,萃取率Y略有减小;(2)在一定的质量配比和浓度下,分配系数K(cup/clow)随温度的升高而增大,但萃取率Y却基本保持不变;(3)在一定的质量配比和温度下,随着次甲基蓝浓度的增加,分配系数K(cup/clow)增大;萃取率Y略有增加。在mPEG/m(NH4)2SO4为1.50∶1,c次甲基蓝=8.915×10-5mol/L、t=30℃的实验条件下,K(cup/clow)=22.14,萃取率(Y)可达95.43%.Extraction behaviors of Methylene Blue in PEG/ammonium sulfate aqueous two-phase systems were studied by Spectro- photometry. Effects of mass ratio（ mPEC〈m（NH4）2SO4 ） ,temperature and concentration of Crystal violet on the aqueous two-phase sys- tems and extraction yield （Y） were investigated. The experiments results show ： （ 1 ） the partition ratio K（ Cup/Clow ） was increased, but the extraction yield （Y） was decreased slightly with mPEG/m〈NH4）2SO4 decreasing under a certain temperature and concentration; （2） under a certain mPEG/m〈（NH4）2SO4 and concentration partition ratio K（ Cup/Clow ）for Crystal violet was obviously increased with tempera- ture increasing, and extraction yield（Y） was nearly unchanged;（ 3 ）under a certain mPEG/m（NH4）2SO4 and temperature the partition ra- tio K（ Cup/Clow ）was increased with concentration of Crystal violet increasing, but extraction yield （Y） was increased slightly, the ex- traction yield （Y） reaches to 95.43% when mPEG〈m（NH4）2SO4 = 1.50 ： 1 ,t = 30℃ and cMethylene Blue = 8.915 × 10^-5 mol/L

关 键 词：次甲基蓝 聚乙二醇 双水相 分配系数K(cup/clow) 萃取率(Y) 

分 类 号：O633.1[理学—高分子化学]