Membrane Filters are a thin, polymeric film made up of millions of microscopic pores. Membrane retain particles and microorganisms that exceed their pore ratings by acting as a physical barrier and capturing such particles on the surface of the membrane. Membrane Disc Filters are pre-cut membrane filters which produced using the highest quality manufacturing standards and optimized to increase efficiency, reduce cost, and expand the capabilities of your laboratory-scale applications. It gives consistent and reliable results that optimized for HPLC media preparation, pharmaceuticals and cold sterilization. We offer different kinds of membranes according to customers application needs which are available in variety of polymers, pore sizes, diameters and surface types. Most membranes can be sterilized by autoclave or non-sterile. Besides, customize is also available.
1. Determine the particle size to be retained or filtered. Membrane will retain all particles equal to and larger than their
designated pore size.
2. Assess the chemical compatibility of the membrane filter with the liquid or gas to be filtered. Consider the chemical
resistance properties of all parts that will contact the filter.
3. Consider hydrophilic or hydrophobic membrane; temperature, flow rate, throughput, and sterilization needs.
Hydrophilic membrane. Resistant to a range of organic solvents. Suitable for use with high pH samples. Binds
proteins, which makes it unsuitable for protein recovery applications.
Hydrophobic membrane. Resistant to organic solvents as well as strong acids and bases. Low protein binding. Low in
extracts. Main applications are the filtration of non-aqueous samples. Prior to filtering of aqueous samples the
membrane must be pre-wetted with a water-miscible organic solvent.
Hydrophilic PTFE membranes are unsupported membrane that ideal for HPLC and mixtures of aqueous and organic
solvents. Use with both aqueous and organic solvents, along with their mixtures.
Hydrophilic membrane. Broad solvent compatibility. Suitable for filtration of aqueous and compatible organic
solvents. Higher liquid flow than either PTFE or PVDF. Low in extracts. Low protein binding.
Hydrophilic membrane. Limited solvent resistance. Very low protein binding capacity, which makes it an excellent
choice for protein recovery applications.
Hydrophobic membrane. Fast flow rate and very low protein binding. Generally compatible with most common
solvents. Ideal for protein recovery applications.
Hydrophilic MCE membranes. Biologically inert mixture of Cellulose Acetate and Cellulose Nitrate membranes which
have higher protein binding than CA for most proteins. High porosity provides high flow rate. Good use for aqueous
based samples.
bases. Either used as a prefilter or as a final filter.
or as a final filter.
Hawach Scientific is a modern enterprise, contains well integration of R&D, production, sales and after -sales service, located at Xi'an High-Tech development Zone, which is one of the five national level High-Tech development Zones with plant covers a production workshop area of 8000㎡, with 4000㎡of clean room. Hawach never stop upgrading our technique, corporate with many famous universities including Northwestern Poly-technical Universities, Xi'an University of Technology, and Shaanxi University of Science and Technology. Hawach has established laboratory analysis institute, research and development center.
Today, we are happy to see our products exported to the United States, Korea, UK, Germany, Dubai, Israel and Mexico. The quality and service of our products receive consistent approval from customers.
Hawach's philosophy is "always high demand, cooperation make success", our mission is "one-stop laboratory solution", By joint efforts of employee, business partners and customers, we believe HAWACH can be a leader of micro filtration industry.
1)24-hour Response
We responds any request from our clients within 24 hours, saving your time and labor.
2)Supporting System
The system consists of claims systems, technical support system, inquiry system and ordering following system. The system will provide after-sales service in full range.
3)After-Sales Service
We have professional sales team and after-service team to solve the problem.
4)OEM Service
We provide OEM service and submit various styles, latest designs to our clients