A Combined Reversed-Phase and Purge and Trap Chromatographic Method to Study the Interaction of Volatile Organic Compounds with Dissolved Humic Acid in Aqueous Solutions
Document Type
Article
Date of Original Version
1-1-1992
Abstract
A combined reversed-phase and purge and trap chromatographic method was used to study the interaction of dissolved Aldrich humic acid with volatile organic compounds in aqueous solution. Humic acid bound compounds were quantified by a purge and trap gas chromatographic method after separation from unbound compounds using C18 solid-phase extraction columns. Partition coefficients (KP) were 22.7 mL/g for dichlorotoluene, 14.9 mL/g for dichlorobenzene, and 3.6 mL/g for trichloroethene. The humic-dichlorotoluene interaction was biphasic and gave a first-order rate constant of 1.8 × 10-5 h-1 for the slower phase, and a second-order constant of 1.01 L g-1 h-1 for the faster phase. Lowering the temperature of the solutions resulted in the increased binding of dichlorotoluene to humic acid. © 1992, American Chemical Society. All rights reserved.
Publication Title, e.g., Journal
Environmental Science and Technology
Volume
26
Issue
1
Citation/Publisher Attribution
Kangot, Reyaz A., and James G. Quinn. "A Combined Reversed-Phase and Purge and Trap Chromatographic Method to Study the Interaction of Volatile Organic Compounds with Dissolved Humic Acid in Aqueous Solutions." Environmental Science and Technology 26, 1 (1992). doi: 10.1021/es00025a019.