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PARTICLE MEASUREMENT

Photonics Spectra
Jun 2009
Shimadzu Scientific Instruments Inc.Request Info
 
Shimadzu.jpgShimadzu Scientific Instruments Inc. has introduced a particle-size measurement principle called induced grating, which its new IG-1000 particle-size analyzer applies to measure single nanoparticles. The advantages over methods that use dynamic light scattering are: The sensitivity is the same when measuring a 1-nm particle or 100-nm ones; interferences from clustering or contamination are reduced or eliminated by using optical signals emitted by the diffraction grating formed by the particles; and a simple three-step work flow injects the sample, inserts the electrode and begins analysis. Mixed samples can be evaluated because the signal size does not depend on particle size.


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GLOSSARY
grating
A framework or latticework having an even arrangement of rods, or any other long narrow objects with interstices between them, used to disperse light or other radiation by interference between wave trains from the interstices. The ability of a grating to separate wavelengths (chromatic resolving power) is expressed as being equal to the number of lines in the grating.
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