CAJ | 학술논문

采用PEG/盐双水相体系萃取食用色素柠檬黄。考察了成相物质对柠檬黄吸光度的影响，在此基础上考察了PEG相对分子量、PEG浓度、盐的种类及浓度、p H 对萃取效果的影响，确定了萃取柠檬黄的最佳条件：18％ PEG2000，15％（NH4）2SO4，pH 为6。该体系对柠檬黄色萃取效果不受外加无机盐的影响，但表面活性剂的存在对萃取效果有较大影响。
채용PEG/염쌍수상체계췌취식용색소저몽황。고찰료성상물질대저몽황흡광도적영향，재차기출상고찰료PEG상대분자량、PEG농도、염적충류급농도、p H 대췌취효과적영향，학정료췌취저몽황적최가조건：18％ PEG2000，15％（NH4）2SO4，pH 위6。해체계대저몽황색췌취효과불수외가무궤염적영향，단표면활성제적존재대췌취효과유교대영향。
An aqueous two-phase system (ATPS )is presented with polyethylene glycol (PEG )and salt for the extraction of tartrazine in this paper.The extraction of tartrazine in ATPS is investigated. Concentration of (NH4 )2 SO4 and PEG,pH value and other factors are evaluated to determine their effects on the extraction yield of tartrazine.The results show that the extraction yield strongly de-pends on the concentration of PEG and (NH4 )2 SO4 .A high extraction yield around 98% is achieved with the following parameters:(NH4)2SO4 15%,PEG2000 18%,pH 6.It is found that the extrac-tion yield undepends on the additional salt,but the presence of surfactant influences the extraction yield evidently.