Why Polycarbonate Membrane Filters?
Ordinary depth-type membrane filters contain tortuous pores that capture particles via random entrapment. The result being some fraction of particles in the interior (interstices) of the membrane filter making them unavailable for observation on the surface by LM or SEM. In contrast, polycarbonate filters contain uniform, cylindrical pores preferentially etched into the membrane, allowing for an even distribution of a collected sample in one plane across the entire exposed membrane surface. Hence all samples are captured on a flat, smooth, glass-like surface. The precisely sized pores in a very narrow distribution ensure accurate separation or fractionation of samples by size. Contaminant-free, these microporous screens are biologically inert, offer excellent chemical resistance, thermal stability, superior strength and negligible adsorption of filtrate. These factors combined with the unique filtration capabilities of the polycarbonate membranes make it a clear preference for a number
