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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
Laser Diffraction: Liquid vs. Dry Applications for Dry Materials
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
Water Woes or Water Win? Probing Water Vapor Uptake and Release with Dynamic Vapor Sorption (DVS)
Water is one of the most important substances on earth, yet it can also be the source of some major headaches throughout the lifecycle of a product. Uptake of moisture from the environment could cause unwanted changes in
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. 1.
Demystifying Zeta Potential
Confused on what a zeta potential measurement is and when it’s useful? You are not alone. In this helpful Q and A, Laboratory Division Manager Ryan Keefer walks us through the basics of zeta potential, points out factors
FAQ’s on Gas Adsorption Surface Area Measurements
Have you found yourself confused about how best to determine the surface area of your sample? How does the analysis work? What does “BET” mean? How many points do I need to collect? What is the appropriate analysis
Industry Leader Particle Technology Labs Marks 30th Anniversary
Independent Lab Provides Scientific Data for Making Big Decisions This year marks Particle Technology Labs’ (PTL) 30th anniversary as a premier particle characterization research and advisory company. Founded in March 1992, PTL serves as a trusted advisor to the world’s
OOS Investigations at the Contract Lab
Out of specification (OOS) results are bound to occur at a testing laboratory. It is important that your contract lab investigates the unexpected results in a timely and thorough way. An OOS result occurs when an analytical result
FAQs on Particle Size Distribution Results from Particle Counters
Have you ever requested a particle size distribution test from PTL and received two sets of data: number-weighted and volume-weighted—only to wonder why and which one is better? A fish tank analogy helps explain the difference. Picture a
Popular Articles
Physical Measurement
What is the Difference Between Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC)
Spring is upon us, and with it comes fluctuating weather conditions! You’re enjoying some warmer days, but also a little worried how the extreme changes in temperature may affect your products. Thermal analysis can help you better understand
Pore Size
What Is Mercury Intrusion Porosimetry and When Is It Used?
You need to characterize the pore structure of your product, but you’re unsure of how best to do so. You’ve done your research and found a technique called Mercury Intrusion Porosimetry (MIP) but it’s unclear if this is
Particle Size
PTL now offering USP 788, USP 789 and USP 787 Testing
Particle Technology Labs is pleased to announce we are now offering USP <788> Particulate Matter in Injections testing, USP <789> Particulate Matter in Ophthalmic Solutions testing, and USP <787> Subvisible Particulate Matter in Therapeutic Protein Injections testing. Parenteral