Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Characterization of individual particle atomic composition by aerosol mass spectrometry










Image Number 6 for United States Patent #6784423.

A method for determining the shape and size of particles and their constituent elements is disclosed. Particle ions are accelerated through a mass spectrometer useful in identifying the source particle of the resulting ions. By measuring the time-varying intensity of the identified ions as they strike a detector, a plot of the intensity of the ions over time is obtained for each ionized particle. The size of each ionized particle is determined by measuring a time span corresponding to the width of the peak of this plot. If the detector is a phosphor detector, the shape of the particle may be determined by using a high-speed camera to capture cross-section images of the ion-induced light pattern at closely-spaced successive moments in time. Alternatively, the intensity of ions striking the detector along at least one lateral dimension may be detected. By combining the multiple cross section images or the multiple lateral direction intensity profiles that are thus captured, an actual image of the shape of the original particle can be obtained.








 
 
  Recently Added Patents
Method and system for blocking hazardous information
Device and method for controlling brightness of organic light emitting diode display
Stable aqueous composite compositions
Therapeutic vitamin D sun-protecting formulations and methods for their use
Synthesizing VHDL multiple wait FSMS into RT level FSMS by preprocessing
Early kill removal graphics processing system and method
Bread basket
  Randomly Featured Patents
Thermoplastic olefin elastomer
Test method for a semiconductor memory
Method of packaging semiconductor device
Solid state storage subsystem for embedded applications
Surgical implantation device and related method of use
Knife
Sliver guiding and measuring assembly having an exchangeable component
Container cap
Single mode channel optical waveguide with a stress-induced birefringence control region
Wrist watch