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Much Ado About Density: An Overview of Density for Solid Materials

Understanding the differences in density types is key to requesting the most appropriate analysis for your sample type and needs. This blog will explain some of the different density analyses for solids offered by PTL.

An Introduction to Surface Area

An Introduction to Surface Area

Surface area is an important property of solids with many industrial applications. This article will cover what surface area is, what affects it, how it is determined and how does gas adsorption work in the laboratory on a practical level.  This article has been adapted from Specifics of Surface Area by Rebecca Lea Wolfrom.

What factors affect surface area and why is it important?

Envision a perfectly smooth, solid, uniform cube of length, width, and height all 10 meters (see Figure 1).







Figure 1: A perfectly smooth, solid, uniform cube with equal length, width, and height.


SPOS/LO for Particle Size and Count

Single Particle Optical Sensing (SPOS) is widely used across a variety of industries due to its excellent resolution, wide dynamic range and high accuracy.  The term SPOS and Light Obscuration (LO) are often used interchangeably in the particle characterization field and international standards.  The technique is also recognized by the USP and ISO as an appropriate technique for determining particle size and concentration. How does this technique compare to other common particle sizing techniques and is it right for your material?


What is SPOS/LO?

Single Particle Optical Sensing (also referred to as the Photozone or at times Light Obscuration technique) requires a particle suspension to pass through a region of uniform illumination produced by a laser diode (photozone). Each particle is counted and sized individually, allowing for the particle size distribution to be built one particle at a time. In order to operate properly and avoid coincidental effects (multiple particles in the photozone), the particle suspension must be sufficiently dilute such that one particle passes through the photozone at a time.

Laser Diffraction: Liquid vs. Dry Applications for Dry Materials

Laser Diffraction: Liquid vs. Dry Applications for Dry Materials

By Jackie Balog – Particle Characterization Chemist II

Laser diffraction is an excellent technique for determining particle size as it allows the user to measure particle size on both a liquid and dry basis. When working with dry materials choosing the most appropriate way to disperse the material will depend on the characteristics of the sample as well as the goal of the analysis. But knowing this information, how do you decide which dispersion technique may be right for you?


Top Tips for the Best Service Lab Analysis

Particle Technology Labs receives an average of 350 samples per week. What can you do to ensure your samples are handled quickly and analyzed accurately? We’ve put together a few tips to help the process run smoothly.