Generator column determination of aqueous solubilities for non-ortho and mono-ortho substituted polychlorinated biphenyls.
Generator column determination of aqueous solubilities for non-ortho and mono-ortho substituted polychlorinated biphenyls.
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发生器柱测定非邻位和单邻位取代的多氯联苯的水溶性。
DOI：
10.1016/0045-6535(95)00313-w
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发表时间：
1995
期刊：
影响因子：
8.8
通讯作者：
Qiao,H
中科院分区：
文献类型：
--
作者：
Hong,CS;Qiao,H
四个非邻位和八个单邻位取代的多氯联苯的水溶解度测定使用发生器柱技术，随后由离线GC/ECD分析的水溶液。该方法是基于泵送水通过一个柱含有玻璃珠涂有正在研究的同系物，并已被用来测量在室温下的溶解度。该方法避免了传统摇瓶系统遇到的许多实验困难。用该方法测定了3，3 ′，4，4 ′-四氯联苯的水溶解度，并与摇瓶法和计算法所得数据进行了比较。重复测量的精密度优于± 6.5%。测定的12种同系物的水溶解度范围为6.07 × 10− 11至4.47 ×− 9 mol/L，一般随分子量的增加而降低，随分子量级别内邻氯取代度的增加而增加。
Aqueous solubilities of four non-ortho and eight mono-ortho substituted PCBs were determined using a generator-column technique followed by subsequent off-line GC/ECD analysis of the aqueous solutions. The method is based on pumping water through a column containing glass beads coated with the congener being studied and has been used to measure solubilities at room temperature. The method circumvents many of the experimental difficulties encountered with the traditional shake-flask system. Aqueous solubility of 3,3′,4,4′-tetrachlorobiphenyl determined by this procedure is compared with data obtained from the shake-flask method and the computational method. The precision of replicate measurements is better than ±6.5%. Aqueous solubilities determined for 12 congeners ranged from 6.07 × 10−11to 4.47 ×−9mol/L and generally decreased with molecular weight and increased with degree of ortho-chlorine substitution within a molecular-weight class.