title: Gas-Assisted IR-ATR Probe for Detection of Volatile Compounds in Aqueous Solutions.
abstract: The application of the principle of solid-phase microextraction (SPME) to attenuated total reflectance (ATR) infrared (IR) probes can provide a convenient and sensitive way to detect volatile organic compounds (VOCs) in aqueous solutions. In this paper a new method to increase the performance of this type of sensing device is proposed. A stream of gas purges out VOCs from aqueous solution. These compounds are directed to an internal-reflection sensor. Several advantages are recognized by this new method as compared with a conventional liquid probe; these include a longer lifetime for the probe, higher selectivity in the detection of VOCs, less limitation in the sample volume, and easier regeneration of the sensing probe.
authors.affiliation: Department of Chemistry, Chung-Yuan Christian University, Chung-Li, Taiwan.
authors.forename: J
authors.initials: J
authors.lastname: Yang
authors.forename: J W
authors.initials: JW
authors.lastname: Her