Determination of Henry's Law Constants of Phenols by Pervaporation-Flow Injection Analysis

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• 作者：Sami Y. Sheikheldin ; Terence J. Cardwell ; Robert W. Cattrall ; Maria D. Luque de Castro ; and Spas D. Kolev
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：January 1, 2001
• 年：2001
• 卷：35
• 期：1
• 页码：178 - 181
• 全文大小：80K
• 年卷期：v.35,no.1(January 1, 2001)
• ISSN：1520-5851

文摘

A novel dynamic nonequilibrium technique for thedetermination of Henry's law constant (HLC) of phenolsbased on pervaporation-flow injection (PFI) is described.A linear relationship between HLC and the amount of phenolmeasured by a detector in the acceptor line of a PFIsystem was demonstrated. This relationship was constructedusing five frequently encountered phenols (phenol, 2,4-dimethylphenol, 2,4-dichlorophenol, 2-chlorophenol, and 2,3-dimethylphenol) and used for the determination of theHLC of three other phenols (2,4,6-trichlorophenol,2-methylphenol, and 3-methylphenol). The HLC of all eightphenols were also determined by the single equilibriumstatic technique (SEST). Fairly good agreement was observedbetween both techniques regarding the HLC of 2,4,6-trichlorophenol, 2-methylphenol, and 3-methylphenol. Onthe basis of the results obtained, it was concluded that thePFI technique offers considerable advantages over SESTin terms of precision, speed, labor intensity, and possibilitiesfor automation.