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| pH值对苯甲酸类正辛醇／水分配系数的影响 | |
| 引用本文： | 马少娜,贾青竹,刘康,王昶,马沛生.pH值对苯甲酸类正辛醇／水分配系数的影响[J].化学工业与工程,2008,25(2):121-124. |
| 作者姓名： | 马少娜 贾青竹 刘康 王昶 马沛生 |
| 作者单位： | 1. 天津科技大学环境科学与工程系,天津,300457 2. 天津科技大学环境科学与工程系,天津,300457;天津大学化工学院,天津,300072 3. 天津大学化工学院,天津,300072 |
| 基金项目： | 天津科技大学校科研和教改项目 |
| 摘 要： | 苯甲酸类化合物是自然水体中的常见有机污染物，属于有机酸。为了考察水相的pH值对该类化合物正辛醇／水分配系数的影响，采用摇瓶法测定了苯甲酸、邻氯基苯甲酸、间硝基苯甲酸和对甲基苯甲酸在不同pH值下的正辛醇／水分配系数，测定结果表明，4种化合物的正辛醇／水分配系数随pH值的升高而降低，且pH值在3～5范围内变化显著。 |
| 关 键 词： | 苯甲酸类化合物 摇瓶法 正辛醇/水分配系数 PH值 |
| 文章编号： | 1004-9533(2008)02-0121-04 |
| 修稿时间： | 2007年3月20日 |
Effect of pH on Octanol/Water Partition Coefficient of Benzoic Acid Derivatives |
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| MA Shao-na,JIA Qing-zhu,LIU Kang,WANG Chang,MA Pei-sheng.Effect of pH on Octanol/Water Partition Coefficient of Benzoic Acid Derivatives[J].Chemical Industry and Engineering,2008,25(2):121-124. | |
| Authors: | MA Shao-na JIA Qing-zhu LIU Kang WANG Chang MA Pei-sheng |
| Affiliation: | MA Shao-na, JIA Qing-zhu, LIU Kang, WANG Chang, MA Pei-sheng (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. |
| Keywords: | benzoic acid derivatives shake-flask method octanol/water partition coefficient pH |
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