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