Characteristics of Membrane Filter

The membrane filters of different materials have different characteristics. Here are as follows:

Nylon (NY) Material

Features: hydrophilic, resistant to some organic materials, not strong acid, protein binding capacity is high, so it is not suitable for protein recovery.

(1) Clarification and sterilization of water and organic solutions;
(2) High-Performance Liquid Chromatography;
(3) Sample preparation;
(4) Isolated microflora.

Polytetrafluoroethylene (PTFE) Material

Features: Hydrophobic, resistant to organic solvents and strong acid, low protein binding ability

(1) Used for filtering anhydrous samples;
(2) Corrosive solutions such as acid-base in the cavity;
(3) Preparation and mobility of high-performance liquid chromatography samples;
(4) Sample clarification.

(5) Air sampling, aggressive chemical filtration, and vent filters in bioprocessing applications.

PES (Polyethersulfone) Material

(1) Ultra-low protein binding capacity and low extraction rate;
(2) Faster flow rate than PTFE and PVDF;

(1) Sterilizing and filtering enzymes and proteins;
(2) Extract blood samples from biological fluid;
(3) Filtering and sterilizing biological and clinical analytical

(4) Used in applications requiring high flow rates, such as sterile filtration in the pharmaceutical and biotechnology industries.

CA (Cellulose Acetate) Material

Features: Hydrophilic, low protein binding rate, limited resistance to organic solvents, excellent throughput.

(1) Filtration of proteins and enzymes;
(2) Recovery of protein;
(3) Biological and clinical analysis of diagnostic cytology, and sterilization of tissues and media.

PVDF(Polyvinylidene Fluoride) Membrane Filters

Features: Wide range of chemicals, including acids, bases, and organic solvents. Wide pH range, from acidic to alkaline solutions, without degradation.  PH compatibility is essential for diverse filtration applications.

Applications: PVDF membranes are used in air and gas filtration, protein binding assays, and solvent filtration in the laboratory.

Glass Fiber (GF) Membrane Filters

Features: Low levels of extractable impurities, minimizing the risk of sample contamination during filtration. Sterilizable through autoclaving or gamma irradiation, suitable for sterile filtration applications in microbiology and biotechnology.

Applications: GF membranes are used in applications requiring high flow rates and the filtration of coarse particles, such as air monitoring and gravimetric analysis.