The 47mm Glass Microanalysis Holders are used for filtering liquid samples under vacuum for microbiological or particulate analysis. Holders are available with either a sintered glass base, stainless steel screen, or PTFE support. A stainless steel screen should be used when producing ultraclean filtrate or when filtering proteinaceous solutions. A PTFE support is recommended with acidic solutions when a higher flow rate is desired.
The 2 inch glass extension allows for physical separation of the 47mm filters that are set up in series. Samples can be processed through successively smaller pore size filters and collected samples can be analyzed separately. The extension will accept either the stainless steel or PTFE support screen.
Units are offered with a borosilicate glass funnel, sintered glass base, stainless steel support(w/PTFE gasket), or PTFE support and base, anodized aluminum clamp, and silicone stopper No.8