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Membrane Type (PTFE, GHP, PVDF, Nylon) — Typically, the first step in selecting a suitable filter is to choose a membrane that is chemically compatible with the sample (see chart opposite). For aqueous samples, it is preferable to use a hydrophilic membrane (GHP, PVDF or Nylon) versus a hydrophobic membrane (PTFE).

with nylon membrane with broad chemical compatibility for solvents and solvent based formulations. Protective Layer • Silicone (optional: EPDM or Viton) 0.45 + 0.2 µm • 21, 25, 27, 28 15 SS |OO SO FF Prefilter Membrane • Final Membrane • Drainage Layer •

Laboratory filter membranes, also known as cut disc membranes, are used in conjunction with filter holders and other hardware in a variety of applications including prefiltration, solvent filtration, sample clarification, sterilizing filtration, air monitoring, particle collection and analysis, and other biological and environmental applications.

The main application of these membrane filters ist the filtration of air, gases and chemicals. PTFE membrane filters have an excellent chemical compatibility (pH 1 to 14), so that they are also used for the filtration of solvents and acids, to which other filter types are

STERIPleat PTFE – Membrane filter cartridge STERIPleat PTFE cartridges are used for sterile filtration of gases. These cartridges also provide excellent chemical compatibility in solvent and aggressive chemical filtration applications.

The wwPTFE membrane is ideal for sample preparation and solvent filtration. Extend column life up to 52x. Improve result quality with up to 24% less filter extractables and lower adsorption. Use one membrane filter type for all your sample preparation applications. Hydrophilic wwPTFE membrane also available in two LCMS-certified configurations.

Cosmospin filters are used to remove fine particles and precipitates from samples by centrifugation. They utilize Omnipore hydrophilic PTFE membrane filter, which has a wide range of chemical resistance. Cosmospin filters are the best choice for HPLC sample filtration. Two pore sizes, G (0.2 µm) and H (0.45 µm), are available.

POREX Virtek Medical PTFE membranes are 100% pure PTFE, maintaining the purity of PTFE along with its natural chemical resistance and other material benefits. Our portfolio of Medical PTFE membranes is performance tested and specifically designed for medical-surgical device applications with optimal airflow, bacterial filtration efficiency (BFE) and fluid barrier features.

Polypropylene syringe filters are the optimal choice for analytical sample preparation. Pall’s polypropylene non-sterile syringe filter housing is chemically resistant to harsh solvents, is low in extractables and low in API and biomolecular compound adsorption. Chemical compatibility is a critical consideration when selecting a syringe filter.

Organic Solvent Nanofiltration Membranes Organic Solvent Nanofiltration (OSN) is a method that uses multiple filtration steps to purify and concentrate cannabis extracts. With this method, batches of crude ethanol extract are filtered using a nanofiltration membrane with pores that prevent large molecules from passing through.

ReliaDisc™ Nylon (Polyamide) Membrane Filtration Media. Ahlstrom-Munksjo. Nylon (Polyamide) membranes are hydrophilic and widely used in both aqueous and organic solvent filtration applications.They are best used in a pH range of 3-14 and at an operating temperature below 100 degrees Celsius.

Membrane Selection Guide. Regenerated Cellulose is a hydrophilic, solvent resistant, low protein binding membrane. RC membrane is ideal for removing particulates from HPLC samples, prior to injection. This membrane is compatible with all HPLC solvents, and can be utilized for particle removal and de-gassing of these solvents.

prefiltration 1994 Hydrophilic polyethersulfone (PES) membrane for liquid filtration applications 1994 Hydrophobic PTFE membrane filters for general purpose gas and solvent purification 1997 PTFE membrane filters with HDPE structure to maintain chemical purity