Description
General description
Whatman® Cyclopore Polycarbonate and Polyester Membranes
Whatman Cyclopore membranes are true pore size microporous membranes featuring sharp cut-off and reproducible microfiltration performance characteristics of track etched membranes. The smooth flat membrane ensures particles are retained on the surface so that they are easily visible under a microscope.
Cyclopore membranes are manufactured using proprietary Whatman technology to produce a precision membrane filter with a closely controlled pore size distribution.
Membranes are produced from a pure polymeric film and give exceptional chemical cleanliness. They are free of contaminants, have low tare weight, minimum water adsorption, and very low levels of nonspecific protein binding.
The polycarbonate (PC) membranes are hydrophilic and are available in a choice of diameters and pore sizes. The polyester (PE) membranes are resistant to most organic solvents, amides, and halogenated hydrocarbons. This broad chemical compatibility makes them suitable for the detection of particles in many corrosive fluids.
Application
Typical applications:
Air monitoring - Trace elements (chemicals, radioactivity) and particulate analysis (dust, pollens, and airborne particles)
Analytical methods - Gravimetric analysis, densitometry, emission spectroscopy, x-ray fluorescence, and infrared analysis
Water analysis - Absorbable organic halides (AOX), direct count of microorganisms, marine biology and dissolved phosphates, nitrates, and ammonia analysis
Blood filtration and cell analysis - RBC deformability, leukocyte removal, RBC filtration and plasmapheresis, chemotaxis, cytology, and cell culture
General filtration - Particulate and bacteria removal, cross flow filtration, HPLC sample preparation, and solution filtration
Microscopy - Electron microscopy, epifluorescence microscopy, and direct optical microscopy
Microorganism analysis - Direct total microbial count, harvesting, concentration, fractionation, yeast, molds, Giardia, Legionella, coliform, and canine microfilaria
Nucleic acid studies - Alkaline elution and DNA fragment fractionation
Oceanographic studies - provide a new tool for studying planktonic organisms. These ultra thin transparent membranes are strong yet flexible, allowing for planktonic samples to be filtered and the membranes to be mounted directly onto microscope slides. (Ref: Hewes et al. 1998; Graham and Mitchell 1999; Graham 1999.)
Biosensors - as a barrier offering controlled diffusion for biological reagents and electrochemical detectors
Diagnostic assays - for flow control, sample preparation, blood separation, and capture of latex microparticles
Cell biology - for cell culture, chemotaxis, and cytological analyses, e.g., direct staining, isotopic and fluorescence based assays
Transdermal drug delivery - as an inert matrix for retention of therapeutics
Features and Benefits
Features and Benefits:
Low affinity for stains providing higher optical contrast and making visibility under a microscope easy
True surface capture provides easy examination of samples and short analysis times
Totally transparent membranes available
Negligible absorption and adsorption of filtrate; nonhygroscopic
Low tare weights
No particle shedding provides ultra clean filtrate
Biologically inert
Legal Information
Cyclopore is a registered trademark of Whatman International Ltd.
Whatman is a registered trademark of Cytiva
