A Universal Photoionization Dgpector for Liquid Chromatography

Liquid-phase photoionization detector for liquid chromatography

“…Comparison of the Present Liquid Phase PID and the Vapor-Phase PID. Some comparisons can be made between the present detector and the earlier PID (2), in which the effluent was evaporated and the vapors passed into a gas-phase PID. No substantial work on the latter was carried out beyond that discussed in ref 2. The test solute studied previously was methylaniline in pentane.…”

“…In attempting to develop such a detector, we have investigated techniques based on photoionization. In a previous publication (2), a photoionization detector (PID) was described in which resonance radiation from xenon or krypton discharges, or Lyman a radiation from a hydrogen / helium lamp, was used to irradiate the flash-evaporated effluent from a HPLC column. To circumvent the problem of effluent evaporation, we now report on a PID based on the direct irradiation of the liquid effluent stream.…”

Multicomponent mixed dopant optimization for rapid screening of polycyclic aromatic hydrocarbons using ultra high performance liquid chromatography coupled to atmospheric pressure photoionization high‐resolution mass spectrometry

“…To enhance the ionization efficiencies of analyte molecules, a selective reagent with favorable ionization energy (a dopant) is added to the mobile phase eluent. In this approach, the dopant will be photoionized and then transfers the charge to the analyte molecules by either proton transfer and/or charge exchange reactions …”

“…In this approach, the dopant will be photoionized and then transfers the charge to the analyte molecules by either proton transfer and/or charge exchange reactions. [4,17] Polycyclic Aromatic Hydrocarbons (PAHs) are a group of organic pollutants that consist of fused aromatic rings and do not contain heteroatoms. PAHs are often generated as byproducts of petroleum or combustion processes.…”

A Photovoltaic Detection System for Flow Injection and Liquid Chromatography

“…The initial development of a photoionization detection system for liquid chromatography was accomplished by Schmermund and Locke . The total effluent from a liquid chromatographic column was heated to 300 °C in an oven and the resultant vapor was analyzed using a commercial photoionization detector for gas chromatography.…”