Hyaluronic acid (HA)-based solutions are traditionally difficult to filter, due to their high viscosity. Many users have found sterile filtration of hyaluronic acid solutions very challenging to implement, from both an economical, as well as a practical standpoint. This White Paper evaluates commercially-available sterilizing-grade products for filtration of HA and explains how sterilizing-grade filters can offer a highly efficient, economical solution even under the worst-case bacterial challenge conditions. It outlines how the combination of various properties of HA-based solutions and…
Wednesday, June 24, 2015 Daily Archives
Best Practices For Successful Filter Integrity Testing Using The Water Intrusion Test (WIT) Method
Hydrophobic filter cartridges which utilize sterilizing-grade polyvinylidene fluoride or polytetrafluoroethylene membranes are widely used in the pharmaceutical industry to sterilize compressed air or gases for product contact, as well as acting as sterile tank vents. However, hydrophobic membranes can also make filter integrity testing in situ difficult, as the membrane must be fully wetted prior to testing by the widely accepted integrity test methods of Bubble Point and Forward Flow. The Water Intrusion Test (WIT) is widely accepted within the…