Browsing by Subject "250/287"

Now showing items 1-3 of 3

    • Ion drift-chemical ionization mass spectrometry 
      Zhang, Renyi (United States. Patent and Trademark Office; Texas A&M University. Libraries, 2008-05-20)
      A method and apparatus for conducting mass spectrometry. The mass spectrometry may be accomplished by ion drift-chemical ionization mass spectrometry. One embodiment includes a chemical ionization mass spectrometer comprising ...
    • Ion source for compact mass spectrometer and method of mass analyzing a sample 
      Da Silveira, Enio Frota; Ray, Kevin Bernard; Schweikert, Emile Alfred; Park, Melvin Andrew (United States. Patent and Trademark Office; Texas A&M University. Libraries, 1997-08-19)
      A mass spectrometer 20 includes an electron multiplier 30 for producing an electron avalanche 58 directed toward an ionization region 38. A sample 40 enters the ionization region 38 through a sample inlet 68. In the ...
    • Periodic field focusing ion mobility spectrometer 
      Gillig, Kent J.; Russell, David H. (United States. Patent and Trademark Office; Texas A&M University. Libraries, 2003-10-28)
      This invention is generally in the field of improved ion mobility spectrometry. The improvement lies in the use of periodic focusing electric fields that minimize the spatial spread of the migrating ions by keeping them ...