Rapid, efficient quantification of water in solvents and solvents in water using an ionic liquid-based GC column Article

cited authors

  • Jayawardhana, DA; Woods, RM; Zhang, Y; Wang, C; Armstrong, DW

fiu authors

abstract

  • Developing versatile, rapid, and accurate analytical techniques for the detection and quantification of water in a variety of materials remains an important and ubiquitous analytical problem. This article describes an effective and sensitive ionic liquid (IL)-based capillary gas chromatography (GC) method with thermal conductivity detection (TCD) to determine the water content in liquid samples. The open tubular capillary columns, coated with specific ILs developed in this study, increased the sensitivity and significantly increased the ruggedness of this technique. The lower limit of detection (LOD) of this method is ~2 ng water. Samples containing high levels of water are also readily analyzed without pretreatment. Conversely, organic solvents can be measured in water by the same approach using either TCD or flame ionization detection. Standardization was performed with National Institute of Standards and Technology (NIST) reference materials and the accuracy was compared with another independent method, Karl Fischer titration (KFT). The developed method is highly sensitive, fast, and is not affected by interferences and side reactions common with existing KFT methods. © 2012 Advanstar Communications, Inc.

publication date

  • January 1, 2012

start page

  • 1

end page

  • 6

volume

  • 30

issue

  • 2