Patents Assigned to Valco Instruments, Co.
  • High voltage spark excitation and ionization detector system with adjustable sample input for sensitivity control
    Patent number: 5317271
    Abstract: A sample is loaded along with a carrier gas into a column. The column discharge is introduced into a chamber downstream of spaced electrodes which create a pulsed DC spark. The spark produces a spectral emission and a metastable carrier gas dispersion that then reacts with molecules of the sample to bring the sample to an excited state. The excess energy surrendered by the sample is characteristic of the species and can be measured by detector electrodes in the chamber.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: May 31, 1994
    Assignee: Valco Instruments, Co.
    Inventors: Wayne E. Wentworth, Stanley D. Stearns