Effect of pH on Octanol/Water Partition Coefficient of Benzoic Acid Derivatives
MA Shao-na~1,JIA Qing-zhu~(1,2),LIU Kang~1,WANG Chang~1,MA Pei-sheng~2(1.Department of Environmental Science and Technology,Tianjin University of Science and Technology,Tianjin 300457,China;2.School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)
(1,2),LIU Kang~1,WANG Chang~1,MA Pei-sheng~2(1.Department of Environmental Science and Technology,Tianjin University of Science and Technology,Tianjin 300457,China;2.School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
Abstract��
As organic acids,benzoic acid derivatives are common organic pollutants in natural water body.In order to investigate the effects of pH value of water phase on the octanol/water partition coefficient of benzoic acid derivatives,the shake-flask method was used to determine the octanol/water partition coefficient of benzoic acid,o-chloro-benzoic acid,m-nitro-benzoic acid and p-methyl-benzoic acid at different pH value of water phase.The results showed that with the arising of the pH value,the octanol/water partition coefficient of benzoic acid derivatives reduced markedly especially when pH value was in the range of 3 to 5.
MA Shao-na~1,JIA Qing-zhu~.Effect of pH on Octanol/Water Partition Coefficient of Benzoic Acid Derivatives[J]. Chemcial Industry and Engineering, 2008,25(2): 121-124
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2008, Vol. 25 
