Means of Introducing an Analyte into Liquid Sampling Atmospheric Pressure Glow Discharge

摘要

A liquid sampling, atmospheric pressure, glow discharge (LS-APGD) device as well as systems that incorporate the device and methods for using the device and systems are described. The LS-APGD includes a hollow capillary for delivering an electrolyte solution to a glow discharge space. The device also includes a counter electrode in the form of a second hollow capillary that can deliver the analyte into the glow discharge space. A voltage across the electrolyte solution and the counter electrode creates the microplasma within the glow discharge space that interacts with the analyte to move it to a higher energy state (vaporization, excitation, and/or ionization of the analyte).

主权项

1. A liquid sampling, atmospheric pressure, glow discharge (LS-APGD) device comprising:
a first hollow capillary including discharge end and comprising a conductive element; a counter electrode disposed at a distance from the discharge end of the first hollow capillary, the counter electrode being the terminal portion of a second hollow capillary, the second hollow capillary comprising a discharge end; a power source in electrical communication with the conductive element of the first hollow capillary and with the counter electrode; a glow discharge space comprising a space in which a flow that exits the discharge end of the first hollow capillary intersects with a flow that exits the discharge end of the second hollow capillary.