Membrane Solution - Membrane Filter

Lab Filtration

Membrane Solutions LLC has a long history of enabling efficient sample preparation within the life science, environmental analysis, clinical, forensic and industrial quality control markets. We are constantly devising ways to improve sample prep to meet the demands of lower detection limits while efficiently processing more samples.

We provide filtration products for essential separation and purification processes and help scientists anticipate and avoid problems in their downstream analyses by finding the optimum sample preparation method.

Products


Membrane Filter

Introduction

Membrane filters or "membranes" are microporous films with specific pore size ratings. Membranes 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 Solutions offers membrane discs in diameters from 13mm to 293mm and materials including PES , MCE, Nylon, PVDF , PTFE , PP , and GF which are manufactured in ISO 9001 certified facilities.
Membrane Solutions's Chemical Compatibility Chart will help you choose the right type of membrane for your application.

Membrane Type

Pore Size Range（um）

Diameter/ other option Available

PES	0.05- 0.65	13, 25,47,90,142,293
MCE	0.22- 5.0	13,25,37,47,90,142, 293/grid, black, sterile
PTFE	0.1 -3.0	13, 25,47,90,142,293
NYLON	0.1- 5.0	13, 25,47,90,142,293
GLASS FIBER	0.5， 1.0， 2.0	13, 25,47,90,142,293
CA	0.2- 3.0	13, 25,47,90,142,293
PVDF	0.22 – 0.45	13, 25,47,90,142,293

Application

General clean and filtration
Sample Prep
Environmental Monitoring and Analysis
Filtration of Aqueous and Organic Solutions
Fluid Monitoring
Pharmaceutical Products Analysis
Chromatography and Mass Spec Sample Prep
Venting and Gas Filtration

Features

High Porosity: Membrane Solution”s thin membrane with high porosity provide high liquid and gas flow per unit area. High porosity also provides high surface area for adsorption or binding

Diversity: Membrane solutions LLC carries many different types of membrane filter which you can easily find your applica tion in one of our membranes.

Clean: As part of comprehensive quality program, only high purity raw materials and reagents are used to produce Membrane Solutions membranes.

Strong: Membrane Solutions’s membranes are monitored for both burst and tensile strength. PTFE and Nylon are very strong for most aggressive applications.

Syringe filters










Introduction
MS^® Syringe Filters are simply quality filters, well packaged, and offered at a fair and competitive price. The Classic range is available in all of the major membranes including Nylon, PTFE, PES, MCE and PVDF, which are supplied in 13mm, 25mm and 33mm formats in virgin polypropylene housings.

Despite the attractive pricing, the emphasis is very much on quality. Membrane materials are supplied by the best names in the industry and the ISO9000 certified manufacturing is carried out to the highest standards, in certified clean room conditions, using the latest manufacturing technology to ensure a high quality, consistent product. All the syringe filters are certified by HPLC Extractable Test.

Syringe Filter

Filter Media

Diameter(mm)

Pore Size(um)

Nylon Syringe Filter	Polyesteramide( Nylon)	13, 25, 33	0.22, 0.45
MCE Syringe Filter	Mixed Cellulose Ester	13, 25, 33	0.22, 0.45
PTFE Syringe Filter	Polyfluortetraethylene	13, 25, 33	0.22, 0.45
PES Syringe Filter	Polyether sulfone	13, 25, 33	0.22, 0.45
PVDF Syringe Filter	Polyvinylidene Fluoride	13, 25, 33	0.22, 0.45

Application

HPLC sample preparation
Routine QC analysis
Content uniformity
Removal of protein precipitates
Dissolution testing
Food analysis
Biofuel analysis
Environmental samples

Features

Application Compatibility: Broad range of filtration media meets diverse application needs.
Minimum sample hold-up: Syringe Filter’s’ housings are specifically designed to maximize sample recovery
Convenient: Each unit is clearly marked with an identifying code to denote pore size, membrane material
Sterile: Filters can be purchased presterilized by Gamma radiation and individually packaged

Filtration Medium Property Comparison

Filtration Medium	Sample Application	Hydrophilic or Hydrophobic
MCE	1) Gas particulate and bacteria filtration 2) Oil particulate and bacteria filtration 3) Alcohol particulate and bacteria filtration 4) Other solvent particulate and bacteria filtration	Hydrophilic
CA	1) Aqueous protein solutions as low protein binding 2) Groundwater filtration as Nitrate-free	Hydrophilic
Nylon	1) Electric semiconductor industrial water filtration 2) Chemicals filtration 3) Beverage filtration	Hydrophilic
PES	1) Sterile filtering protein solution 2) Tissue culture media filtration 3) Tissue culture additive filtration	Hydrophilic
PVDF	1) Gas filtration 2) Vapor filtration 3) High-temperature filtration 4) Food industry 5) Medicine filtration	Hydrophobic
PTFE-B	1) Organic solvent with strong chemical causticity filtration 2) strong acid solvent filtration 3) Alkali solvent filtration	Hydrophobic
PTFE-L	1) Inorganic solvent with strong chemical causticity filtration 2) Mixed solvent filtration in HPLC(Acetonitrile/Water) 3) Alkali solvent filtration	Hydrophilic

Vacuum Filter

Introduction

Vacuum Filter is used primarily in microbiological and analytical procedures that involve collecting a particulate (bacteria, precipitate, etc.) from a liquid suspension. Liquid poured into a funnel passes through a filter, which retains the particulate, and filtrate can be collected into a filter flask, directly or via a vacuum manifold. Applying vacuum reduces process time compared to gravity flow.
Multi-branch Manifold filter is particular design and produce for several samples filtrate at the same time. At present domestic laboratory filtrate liquid usually adopts the glass nature core, while this method only filtrates one sample once, and it has low speed, low efficiency, and less labor exertion. It is more convenience for the operator who needs to filtrate several samples at the same time.
Membrane Solutions supplies a wide range of vacuum filter holders, Glass Solvent Filters, Multiple Filtration Systems, and Accessories. Select from glass or stainless steel assemblies with funnels holding from 15 to 1000 ml. MS^® Vacuum filters can be steriled by autoclave.

Application

Widely used for chemistry analyse
Biochemical-pharmaceutical sanitation test environment test
Water quality analyse
Foodstuffs and beverage test
Science research and so on.
Vacuum filter aqueous, organic or corrosive liquids for particulate contamination analysis.
It is recommended for HPLC solvent filtration and it has the function of outgas to guarantee the clean of mobile phase and avoid the blockage of HPLC liquid flow path.

Features

Features and Property

This product is made of high-quality extra hard glass. It is sparking and crystal-clear. Its thickness is even.
The performance of withstanding voltage and its leakproofness is very good. Its size agrees with the international standard size. Therefore, it can be used for sterilization at high temperature and high pressure.

Multiple Vacuum Filtration Systems Feature

Each holder have individual control valve, agility for use、convenience in antisepsis、 high efficiency.
Test three or six samples at the same time, high sensitivity, low false –positive, and easy to operation.

User Guide for Multiple Vacuum Filtration Systems

Microbiology Test

MS^® Microbiology Supplies

Introduction

Mixed Esters of Cellulose (MCE) or Cellulose Acetate(CA) are best for microbiology and environment monitoring test. Contrasting grid lines facilitate counting colonies on the filter surface and are tested to assure freedom from grid line inhibition.

Membrane Solutions offers sterile membrane discs in diameters of 25mm 37mm 47mm and other diameter, also for different bacteria testing. We have 0.10um, 0.22um, 0.45um, 0.65um, 0.80um, 1.00um for choose. Black membranes are tested for optimal recovery of yeast and total bacteria. Membrane Solutions MCE membranes are also tested for freedom from grid line inhibition and optimal color reactions on appropriate test media.

Availability

Sterile Mixed Cellulose Ester(MCE) filter
Sterile Cellulose Acetate Filter
Absorbent Pads
Petri Dishes

Application

Microbiological analysis of water, wastewater, pharmaceuticals and beverages.
Small volume field sampling and analysis of fluids or aerosols.
Quartz fiber filter for monitoring air pollution.
Thimble filters for monitoring dust, organic, metal, or other pollutants.

Features

Pure Mixed Cellulose Esters (MCE) or Cellulose Acetate: MCE and CA are pure cellulose membrane made for microbiology test.
Convenient Package: Membranes are available in box, individually packed, custom labeling. Also it is available in 10-pack.
Available with grid lines, wide range of pore size and different colors: Contrasting grid lines are best for colonies counting. Also wide range of pore size ensure multiple bacteria testing, black and green color are also available.
Test for Microbiology: Membrane Solutions’ MCE membranes are tested for free of inhibition of bacteria growth.

Filtration Process

Set membrane filter into the filter holder	Rinse the funnel with sterile buffered water	Add the appropriate media onto the absorbent pad	Place filter onto the Pad	Count the colony

Sterile Membrane Filter

● Mixed Cellulose Ester(MCE) filters available in white and black; Cellulose Acetate available in white;
● Gridded or Non-gridded;
● Available pre-sterilized, individually packed;

Absorbent Pads

Pure cellulose pad will not inhibit any bacterial grow.
Consistent thickness and bed volume
Customized diameter is available.
Available with or without petri dishes.
Sterile, individually packed available.