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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
Three Things Your Particle Size Contract Lab Needs to Know to Match Your Specifications
Particle size specifications are designed to ensure raw ingredients and products perform as expected. Often, companies are required to verify that their material is meeting these specifications regardless of which supplier is used. Using a contract lab for
Through-Pore Galore: Face Masks, Filters, and More!
You don’t have to be a scientist to appreciate the importance of filtration in our world today. Face masks and air filtration systems have been employed for protection against a pathogen in a pandemic and against harmful particulates
What Is Method Validation and Might You Need It?
By Shane Hill Confidence, reliability—ultimately peace of mind. In short, this is the takeaway following an analytical test method validation. Do you work in pharmaceuticals, cosmetics, or the environmental realm? All of these fields, and more, benefit greatly
Using Image Analysis to Answer Your Most Challenging Particle Characterization Questions
The possibilities are endless when it comes to image analysis. Over the years, the experts at Particle Technology Labs have developed and validated countless particle characterization methods using microscopic image analysis, and the wealth of information from these tests
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