CAJ | 학술논문

研究了阳离子表面活性剂Aliquat 336(三辛基甲基氯化铵)浊点萃取水中双酚A(BPA)后以高效液相色谱测定的方法.探讨了Aliquat 336与Na_2SO_4/NaCl用量、pH值、萃取时间等因素对萃取效果的影响,经条件实验选定各因素水平如下:0.8 g/L Aliquat 336,4.0 g/L Na_2SO_4,超声萃取15 min,pH和对萃取影响不大,故不予调节.结果表明: 在此选定条件下,本方法富集效率高(BPA在胶束相-水相分配系数达10~4),萃取效率稳定(相对标准偏差均小于10%),其对BPA在不同水质、不同加标浓度下的回收率均大于90%,去离子水中检出限为0.34 μg/L.本方法操作简单、方便、成本低,易于推广.同时以胶束粒径与Zeta电位分析等确证盐含量对阳离子表面活性剂胶束形成的决定性作用,并结合影响因子分析,推测Aliquat 336浊点萃取过程中BPA可能存在静电作用、阳离子-π键等疏水分配以外的作用机制.
연구료양리자표면활성제Aliquat 336(삼신기갑기록화안)탁점췌취수중쌍분A(BPA)후이고효액상색보측정적방법.탐토료Aliquat 336여Na_2SO_4/NaCl용량、pH치、췌취시간등인소대췌취효과적영향,경조건실험선정각인소수평여하:0.8 g/L Aliquat 336,4.0 g/L Na_2SO_4,초성췌취15 min,pH화대췌취영향불대,고불여조절.결과표명: 재차선정조건하,본방법부집효솔고(BPA재효속상-수상분배계수체10~4),췌취효솔은정(상대표준편차균소우10%),기대BPA재불동수질、불동가표농도하적회수솔균대우90%,거리자수중검출한위0.34 μg/L.본방법조작간단、방편、성본저,역우추엄.동시이효속립경여Zeta전위분석등학증염함량대양리자표면활성제효속형성적결정성작용,병결합영향인자분석,추측Aliquat 336탁점췌취과정중BPA가능존재정전작용、양리자-π건등소수분배이외적작용궤제.
Cloud point extraction(CPE) utilizing a cationic surfactant, tricaprylmethylammonium chloride(Aliquat 336), was carried out to separate and concentrate bisphenol A(BPA) from aqueous media. Cloud point phase separation of Aliquat 336 at room temperature(about 25 ℃) was induced by the addition of Na_2SO_4. The parameters affecting extraction efficiency, such as concentrations of Aliquat-336 and Na_2SO_4, pH, and equilibration time were evaluated. The results showed that the extraction efficiency was practically constant in the studied range of Aliquat 336, co-solvent(methanol), pH and dissolved organic matters. At the operational CPE conditions, distribution constant, K_D, of the distribution of BPA between the surfactant-rich and aqueous phases of the CPE system was estimated to be 10~4. Coupled to liquid chromatography with UV detection, the CPE method offered a detection limit of 0.34 μg/L in distilled water and recovery of BPA ranged from 90% to 108.6% with a sample volume of 50 mL in three matrices studied. The high extraction efficiency might be due to combination of ion-pair, hydrophobic effects and cation-π interaction, based on the micelles' size distribution and zeta potential analysis.