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EPICS 법을 이용한 Air / Water 분배계수 ( Henry 상수 ) 측정과 포화증기압 및 포화용해도와의 상관관계
박소진(So Jin Park),한선덕(Seon Deok Han),류선아(Seon Ah Ryu) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.6
Air/water partition coefficients(K_(aw)) as environmental parameter were measured by EPICS(equilibrium partitioning in closed system) method. K_(aw) of some n-alkanes were measured to test EPICS method. The accuracy and reproducibility of this method were reliable, since experimental values were agreed very well with literature values. Then, we measured K_(aw) and Henry`s law constants of some organic compounds which are widely used in the field of chemical industry and MTBE and TAME which are recently used as an octane booster for unleaded or low leaded gasoline. The relationship between K_(aw) and vapor pressure and water solubility was analysed. The measured K_(aw) was linearly proportional to molar volume and temperature, and inversely proportional to water solubility and vapor pressure except substituted benzene. Henry`s constants are increased with the temperature.
Generator Column 법을 이용한 1-Octanol/Water 분배계수 측정과 Water Solubility 와의 상관관계
박소진(So Jin Park),류선아(Seon Ah Ryu),한선덕(Seon Deok Han) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.3
1-Octanol/water partition coefficient (K_(ow)) is not only an useful parameter in studying the effect of organic compounds on organs or cells of an organs but also an index of hydrophobicity, which was measured by generator column method. In the experiment, the water saturated 1-octanol and the 1-octanol saturated water were chosen as stationary and mobile phases respectively. The K_(ow) was measured with changing concentration of the solute in stationary phase and the flow rate of mobile phase. The accuracy and reproducibility of this method were reliable since the average deviation is within 4 % compared with the literature values for C₄-C_7 alcohol systems. Thus, the K_(ow) of some n-alkanes, chlorinated and aromatic compounds were measured in this work. The measured K_(ow) of these organic compounds were linearly proportional to their molar volumes and the K_(ow) vs. water solubilities could be expressed by a first order linear equation.
Shade Flask 법을 이용한 1-Octanol/Water 분배계수 측정
한선덕(Seon Deok Han),박수진(Soo Jin Park),박소진(So Jin Park) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.1
The 1-octanol/water partition coefficient(K_(ow)) is used to estimate the chemical`s fate and the behavior of chemicals against the organization. We want to determine the K_(ow) by using shake flask(SF) method. Firstly we established the requiring time for preparing of saturated solution and for partitioning equilibrium in the SF method with tert-butanol. The accuracy and reproducibility of this SF method was reliable since the average deviation was less than 5 % between measured K_(ow) values of alcohols(C₁-C_7) and the reported values. The K_(ow) for some chlorinated and aromatic compounds were measured. The K_(ow) of these organic chemicals were linearly proportional to their molar volumes and the relationship of K_(ow) and water solubilities can be expressed by a first order linear equation.