Improved solution cathode glow discharge micro-plasma source with a geometrically optimized stainless steel auxiliary cathode for optical emission spectrometry of metal elements

A novel solution cathode glow discharge geometry for improved coupling to optical emission spectrometry

“…For example, the addition of low molecular weight molecules, 19,20 surfactants, 21 and different acid electrolytes 22 have been studied as a means to improve transfer of analyte into the SCGD plasma. Alternate means of solution grounding, 5 electrode geometries, 23 and alternate discharge powering schemes 24 have also been examined. The use of the reversed polarity discharge (solution as anode) has also been examined as a means of improving detection limits for some elements.…”

Development of milli-second pulsed atmospheric pressure solution cathode glow discharge optical emission spectroscopy for detecting metal elements in aqueous solution

“…3 An increase in the power density was observed, with a detection capability in the range of 0.06-22 mg L À1 for Hg, Ag, Cu, Cd, etc. Various studies have been focused on optimizing the detection performance by altering the liquid surface tension, discharge structure, 4,5 and coupling with other methods. 6 T. A. Doroski et al used formic acid, acetic acid, and ethanol as chemical modiers for SCGD to enhance the surface tension of the liquids.…”