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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
Our Roots as Experts in PM10 and PM2.5 Testing
Did you know Particle Technology Labs began as a testing service for companies needing to meet EPA environmental safety standards? While we are most known today for our testing for the pharmaceutical industry and our commitment to cGMP
Blessed. Thankful. These Words are More Than Cliches for a PTL Team Member
Kelli Hubert, Particle Technology Labs’ Customer Service Manager, highly values her work and her colleagues I can genuinely say that I am blessed to work at Particle Technology Labs and thankful for my coworkers. Without a doubt, I
Testing Particle Size by Laser Diffraction
Laser diffraction is a frequently requested technique in the particle characterization industry, but how do you know if it’s right for your material and process? The experts at Particle Technology Labs have years of experience evaluating powders, semi-solid
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