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 ...

In order to quantify the count and size of subvisible particles in eye care products, the USP <789> test is carried out. This consists of utilizing a light obscuration particle counter and counting ...

Particle measurements in ultra-pure water (UPW) systems can take a long time to return to a stable baseline after normal operations are interrupted by an event such as maintenance shutdowns. A ...