New Particulate Matter Testing Services
                     New Particulate Matter Testing Services
STEMart, a US-based provider of comprehensive services for all phases of medical  
device development, is proud to announce the launch of its new Particulate Matter  
Testing Services with a wide range of particulate matter testing from 3,000 μm. STEMart can provide accurate analysis and material characterization  
from nanometer scale particles to bulk powders with its various testing techniques.
Particulate matter is defined as foreign, mobile, undissolved particles, excluding air  
bubbles, unintentionally present in injectable drugs, parenteral infusions, ophthalmic  
solutions and various medical devices. Particulate Matter testing is used to remove,  
count, and size particulate contaminants that are inherent to the product or that  
result from the manufacturing process. This testing is useful for identifying potential  
sources of particulate matter and avoiding potential risks to patients from the device.
STEMart now offers Particulate Matter Testing Services with a range of particulate  
matter testing from 3,000 μm. The team of experts can provide  
accurate analysis and material characterization from nanometer scale particles to  
bulk powders using various testing techniques.
STEMart's Particulate Matter Testing uses two methods, the Light Obscuration  
Particle Count test and Microscopic Particle Count test. The former test is adapted  
from United States Pharmacopeia Method , which provides standards for  
injectable solutions, uses an appropriate instrument based on the principle of light  
masking that automatically determines the size of the particles and the number of  
particles based on size. The size ranges used for USP testing are ≥10 μm and ≥
25 μ m. Liquid particle counters are capable of measuring and counting particles  
from 2 μm to 100 μm in diameter.
The general procedure for Microscopic Particle Count test is to wet the inside of a  
filter holder containing a membrane filter with a few milliliters of particle-free water,  
transfer the total volume of the solution cell or individual units to a filter funnel and  
apply a vacuum, then place the filter in a Petri dish and allow the filter to air dry.  
After the filter has air dried, place the Petri dish on the stage of the microscope, scan  
the entire membrane filter under the reflected light of the illumination unit, and  
count the number of particles. This procedure is also under the guidance of USP  
Method , which provides standards for injectable solutions, and the size ranges  
used for USP testing are ≥10 μm and ≥25 μm.
To learn more about STEMart's Particulate Matter Testing Services, please visit the  
website at https://www.ste-mart.com/.
About STEMart
STEMart is an industry-leading eCommerce platform incorporated with an extensive  
global footprint and a broad portfolio of more than 10,000 products. It aims to  
provide better lab materials, medical instruments and consumables, excellent  
technologies, and high-quality services to global customers in the fields of science,  
technology, and engineering, from the discovery stage upward to the manufacturing  
process. STEMart is dedicated to enhancing research and biotech production with  
simpler and safer protocols in order to access better health worldwide.