摘要
用分光光度法研究了亚甲蓝(MB)染料在水溶液中的聚集状态及其与表面活性剂的相互作用,讨论了无机盐对亚甲蓝在阴离子表面活性剂溶液中聚集状态的影响。推导了水溶液中亚甲蓝单体和二聚体的动态平衡关系式。利用计算机程序不仅求出了与作图法结果非常接近的MB单体的摩尔吸光系数和聚合平衡常数,而且求出了MB二聚体的摩尔吸光系数及相应浓度下MB单体所占的比例系数。
The aggregation of methylene blue dye molecule in aqueous solution and its interaction with surfactants have been investigated by UV-Vis absorption spectroscopy. The effect of mineral salts on the aggregation of MB in the presence of anion surfactants has also been discussed. According to the dynamic equilibrium of MB monomer and dimer, the molar absorption coefficient of MB monomer (ε_m=5.90×10~4L·mol^(-1)·cm^(-1)) and the equilibrium constant of dimerazition (K′=6.38×10~3) have been obtained by computer programming method, which coincides well with the results from constructive method. Furthermore, the molar absorption coefficient of MB dimer (ε_d=1.22×10~5L·mol^(-1)·cm^(-1)) and the proportion coefficient of MB monomer in different concentrations have also been worked out.
出处
《分析科学学报》
CAS
CSCD
北大核心
2004年第6期573-576,共4页
Journal of Analytical Science
基金
国家自然科学基金(No.20246002
20236010)
江苏省社会发展基金(No.BS2000013)
关键词
亚甲蓝
二聚体
阴离子表面活性剂
摩尔吸光系数
聚合平衡常数
Methylene blue
Dimer
Anionic surfactant
Molar absorption coefficient
Dimerazition equilibrium constant
