Millipore® Isopore™ White Track-Etched Polycarbonate Membrane Filters

Millipore's Isopore™ membrane filter is a polycarbonate, track-etched screen filter recommended for all analyses in which the sample is viewed on the surface of the membrane. Isopore membrane offers distinct advantages for the analysis of airborne contaminants and other particles using optical or electron microscopy. The Isopore™ membrane is composed of polycarbonate film, which has a smooth, glass-like surface for clearer sample observation. The unique manufacturing process of the membrane ensures a precise pore diameter and a consistent pore size for accurate separation of samples by size. Isopore™ membranes do not stain resulting in low background interference. Clearing is not necessary for most transmitted light microscopy. Matched-weight filters are not usually required because of low, constant tar and ash weights. Isopore membranes are non-hygroscopic, which permits rapid drying and reduced sample analysis time.


  • Isopore™ VCTP, TSTP & TTTP membranes are designed for air analysis, cell culture, bioassays, cytology, environmental analysis and epifluorescence
  • Isopore™ GTTP membranes are designed for chemotaxis, bioassays, cytology, air monitoring, SEM analysis and sterility testing
  • Isopore™ HTTP membranes are designed for adsorbable organic halides (AOX), air monitoring and particle monitoring
  • Isopore™ DTTP & ATTP membranes are designed for reflective light microscopy, SEM analysis, gravimetric analysis, air monitoring, asbestos monitoring
  • Isopore™ RTTP membranes are designed for chemotaxis, bioassays, cytology and air monitoring