聚乙二醇-硫酸铵双水相萃取结晶紫的研究  

Study on the Extraction Behaviors of Crystal Violet in PEG/Ammonium Sulfate Aqueous Two-Phase System

作　　者：巩育军[1] 姚晓青[1] 薛鹏升 

机构地区：[1]广东石油化工学院,广东茂名525000

出　　处：《化学与生物工程》2011年第11期27-29,共3页Chemistry & Bioengineering

基　　金：广东省科技计划资助项目(2010B031700011)

摘　　要：利用分光光度法研究了结晶紫在聚乙二醇-硫酸铵双水相体系中的萃取行为,探讨了质量配比(mPEG/m(NH4)2SO4)、温度、结晶紫浓度对结晶紫的分配系数(cup/clow)及萃取率的影响。结果表明,在一定的温度和结晶紫浓度下,随着质量配比的减小,结晶紫的分配系数增大,萃取率略有降低;在一定的质量配比和结晶紫浓度下,随着温度的升高,分配系数显著增大,萃取率基本保持不变;在一定的质量配比和温度下,随着结晶紫浓度的增大,分配系数显著减小,萃取率基本保持不变;在mPEG/m(NH4)2SO4为1.25∶1、结晶紫浓度为6.536×10-5 mol.L-1、温度为50℃的条件下,萃取率高达99.81%。Extraction behaviors of crystal violet in PEG/ammonium sulfate aqueous two-phase system were studied by spectrophotometry.Effects of mass ratio of PEG to（NH4）2SO4,temperature and concentration of crystal violet on the partition ratio（cup/clow） of crystal violet and its extraction rate were investigated.The experimental results showed：the partition ratio for crystal violet was increased with mPEG/m（NH4）2SO4 decreasing under a certain temperature and concentration, and the extraction rate was decreased slightly;under a certain mPEG/m（NH4）2SO4 and concentration,the partition ratio for crystal violet was obviously increased with temperature increasing,and the extraction rate was nearly unchanged;under a certain mPEG/m（NH4）2SO4 and temperature,the partition ratio was obviously decreased with concentration of crystal violet increasing,but the extraction rate was unchanged nearly;the extraction rate reached as high as 99.81% when mPEG/m（NH4）2SO4 was 1.25∶1,temperature was 50 ℃ and concentration of crystal violet was 6.536×10-5mol·L^-1.

关 键 词：结晶紫 聚乙二醇 双水相 分配系数 萃取率 

分 类 号：TQ028.32[化学工程] O652.6[理学—分析化学]