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 for driving bistable display device
Image forming apparatus, control method of image forming apparatus, and storage medium
Charge pump and method of biasing deep N-well in charge pump
Generator with a segmented stator
Hemostatic devices and methods of making same
Imaging apparatus for calculating a histogram to adjust color balance
Portable stand
  Randomly Featured Patents
Straight needle apparatus for creating a virtual electrode used for the ablation of tissue
Process for the preparation of substituted acyclic nucleosides, and intermediates occurring therein
Absorbent article
Double-sided printing press
Radio frequency hair removal tweezer
Brine maker
Adapter for non-standard sized battery
Arrangement for feeding
Air cycle air conditioner for heating and cooling
Child safe cord lock