Particle Characterization
Greetings from your friends at HORIBA Instruments!
Our latest edition welcomes you attend Webinars on glass beads (used in road paint) and an introduction to acoustic and electro acoustic spectroscopy, download new application notes on measuring the size and shape of abrasives using image analysis, and measuring the critical micelle concentration of a surfactant using dynamic light scattering and to visit our new web page on characterizing proteins. Finally we extend an invitation to attend the next customer training course in Irvine, CA.
Webinar on Particle Size and Shape of Glass Beads used in Highway Paint
Please join us for our web-based seminar (or Webinar) Wednesday, January 27th at 2 PM Eastern (11:00 AM Pacific) on using dynamic image analysis to measure the size and shape of glass beads used in road paint. The presenter will be Arturo Perez from the Texas Department of Transportation. Topics covered include:
- Why particle size and shape is important
- Techniques including sieves and image analysis
- Methodology when using image analysis
As always, attending the Webinar is easy and free of charge. We will be glad to help you understand how to attend.
view the invitation to the Webinar on Particle Size and Shape of Glass Beads used in Road Paint.
Webinar on Acoustics and Electro Acoustics
Please join us for our web-based seminar (or Webinar) Thursday, February 11th at 2 PM Eastern (11:00 AM Pacific) on particle characterization using acoustics. There are many benefits to using acoustics to characterize suspensions including the ability to measure without dilution and being able to measure particle size and zeta potential simultaneously. This presentation will describe the theory and application of this powerful technique. Topics covered include:
- Acoustic theory
- Zeta potential
- Dispersion stability
- Applications
View the invitation to the Webinar Acoustic and Electro Acoustic Spectroscopy
Particle Size and Shape of Abrasives
Many abrasives are either natural or synthetic minerals used to shape or finish a work piece through rubbing which leads to part of the piece being worn away. They are used in a wide range of domestic and industrial applications, giving rise to a wide range of chemical composition, physical size, and shape of the abrasive material. This study utilizes automated image analysis to quantify the size and shape of various abrasive materials.
Technical Note AN187 on Particle Size and Shape of Abrasives (You need to be logged in).
Measuring the Critical Micelle Concentration using DLS
Surfactants may self-assemble into structures called micelles when they reach a concentration known as the critical micelle concentration (CMC). While individual surfactant molecules are too small for detection by most sizing techniques micelles are large enough for particle size analysis using the dynamic light scattering (DLS) technique. It is important to understand where the CMC is for many systems because of the interplay between micelles and lipophilic proteins. Additionally, locating the CMC is necessary when using surfactants to disperse powders as the formation of micelles is followed by particle agglomeration/aggregation. This study describes an experiment to determine the CMC of Triton X-100 using a DLS-based particle size analyzer.
Technical Note AN188 Critical Micelle Concentration Determination using Dynamic Light Scattering (You need to be logged in).
New Web Page on Characterizing Proteins
Proteins are organic compounds made of amino acids arranged in a linear chain and folded into a globular form. The size of a protein is an important physical characteristic that provides useful information including the presence of monomers, dimers and trimers, changes in conformation, aggregation state, and denaturation. Protein scientists typically discuss "protein size" or molecular weight, as opposed to using the phrase "particle size", but particle size analyzers are often used in their studies. There is also interest in the surface charge or valence of proteins, so zeta potential is another measurement used by protein chemists. This web page contains links to protein studies performed using HORIBA instruments.
Upcoming Customer Training Courses
The HORIBA Particle Characterization Group has been steadily expanding our offering of customer training courses. The next laser diffraction (LA-series instruments) training courses will be held in Irvine, California, February 3-4.
Click for information on "Boot Camp" customer training course registration.
Other State of the Art HORIBA Technologies
HORIBA offers a wide range of analytical technologies beyond particle characterization. Many of our customers are also interested in some of these other techniques. In this newsletter we invite interested scientists to investigate our various fluorescence spectroscopy instruments. These systems have application in many fields including proteins, nanotechnology, and soils.
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