Environmental Monitoring and Sample Collection: Membrane Filtration Equipment, Filtration Media, Membrane Filters, Disposable Filter Monitors, Whirl-Pak Sample Bags, Water Samplers, Sludge, Solid and Liquid Sampling
M-Tech Diagnostics: Filtration Equipment and Media
M-Tech Diagnostics are the UK distributors for a number of suppliers worldwide, providing a wide range of filtration equipment, consumables and filtration media products for use in analytical chemistry, environmental monitoring and microbial testing. Company Profile M-Tech Diagnostics supply a wide range of filtration equipment, consumables and filtration media products for use in analytical chemistry, environmental monitoring and microbial testing. Founded in 1991, M-Tech Diagnostics initially established business with pharmaceutical and beverage manufacturers supplying a range of industry standard filtration equipment and filtration media for use R & D, Quality Control, production and environmental monitoring. Additional products for food pathogen testing and hygiene monitoring have been added to this core business to provide a comprehensive, co-ordinated range of products which address the tasks facing Industry, Environmental and Public health laboratories. M-Tech Diagnostics Products for the Water Industry: Environmental Sampling A wide range of environmental sampling products M-Tech provides a wide range of environmental sampling and sample collection products from sample collection and storage to surface, solid and water-core samplers. M-Tech provides a complete range of Whirl-Pak sample bags, manufactured by Nasco in the USA, for sampling, transport, storage and blending. The Sludge Judge sludge sampling range allows easy and accurate readings to be taken of settled solids, while the Swing and Tank samplers allow simple liquid sample collection from otherwise awkward situations. Also manufactured by Nasco are a wide range of solid sampling products, from spoons and scoops to ice and grain samplers. Water and Sludge sampling solutions Solid sampling Whirl-Pak® Bags Filtration Equipment M-Tech supply a comprehensive range of filtration equipment and consumables, from filter papers and membranes to vacuum manifolds and disposable filter monitors. For more information, see the specific product pages: Filtration Equipment Groundwater Filters Filter Membranes Disposable Filter Monitors NanoCeram® high flow rate alumina filters Filtration Media: Ampoule and Dehydrated Media M-Tech sells a wide range of ampoule media manufactured by S&S BioPath in the USA for membrane filtration applications. Routinely available in this range are: m-green yeast & mould m-Endo coliform medium Total count medium + TTC Cetrimide Pseudomonas broth Membrane lauryl sulphate broth Other media may be available on request. Nutrient pad sets (NPS) are sterile, dehydrated culture media, ready for immediate use after addition of water. Shelf life of the sealed original package at room temperature is at least one year. Nutrient pads sets (NPS) are obligatorily used in combination use with membrane filtration technique. The Nutrient pads sets are made of biologicaly inert cellulose cardboard that does not bind the nutrient medium chemically as compared to conventional agar culture media. M-Tech supplies a comprehensive range of conventional dehydrated media manufactured by Laboratorios Conda in spain. Under the brand Pronadisia, Conda supply: dehydrated culture media, agar, peptones and other media ingredients; microbiological control reagents for the food, brewing and beverage industries; diagnostic reagents for serology and haematology. Agar media and components are routinely available in 500g, 2.5kg and 5kg pack sizes. Larger pack sizes, up to 25kg, can be supplied on request. Other M-Tech Diagnostics Products: CHROMagar: Chromogenic Media Why? Because you are about the quality of you procedures for isolation and differenciation of pathogenic microorganisms, Because you need rapid and reliable results. Who? The company who pioneered chromogenic media, with the original Rambach agar. What? CHROMagar chromogenic media allow isolation and direct differentiation of several pathogenic microorganisms simply by the colour of the colonies. Cytology M-Tech provide a wide range of cytology products manufactured by Scientific Device Laboratories in the USA. Featured products in the range: Acri-Fluor fluorescent stain Aqua-Hold PAP pen Portable Incubators Thermotote Portable IncubatorsM-Tech supply the Thermotote range of portable incubators for use in the field, car or lab benchtop, ideal for a wide-range of in-field applications. CyTherm Temperature Monitoring SystemThe Cytherm temperature logger provides a rebust and easy to use temperature logging system. Sample Processing Sample Preparation Gravimat gravimetric dilutor BagPipette Sample Processing BagMixer Homogeniser Consumables BagClip temporary bag closure BagLight homogeniser bag BagFilter homogeniser bag with lateral filter BagPage homogeniser bag with full page filter BagTips pipette tips Biological and Chemical Indicators A comprehensive range from Raven Biological Laboratories Inc. M-Tech provides a wide range of biological and chemical indicators produced by Raven Biological Laboratories. All Raven products are manufactured in accordance with current Good Manufacturing Practices of the United States Food and Drug Administration and meet the standard established by U.S.P. Immuno-Magnetic Beads M-Tech supply a range of A-Bead immuno-magnetic beads, manufactured by Aureon BioSystems in Austria. The use of magnetic beads for sample processing has proven to be a useful, sensitive technique, employed in routine applications as well as in research. The primary technological advantage of using immuno-magnetic beads is their ability to bind to almost any defined target molecule, such as nucleic acids, proteins or whole cells with very high specificity.
M-Tech Diagnostics are the UK distributors for a number of suppliers worldwide, providing a wide range of filtration equipment, consumables and filtration media products for use in analytical chemistry, environmental monitoring and microbial testing.
M-Tech Diagnostics supply a wide range of filtration equipment, consumables and filtration media products for use in analytical chemistry, environmental monitoring and microbial testing.
Founded in 1991, M-Tech Diagnostics initially established business with pharmaceutical and beverage manufacturers supplying a range of industry standard filtration equipment and filtration media for use R & D, Quality Control, production and environmental monitoring.
Additional products for food pathogen testing and hygiene monitoring have been added to this core business to provide a comprehensive, co-ordinated range of products which address the tasks facing Industry, Environmental and Public health laboratories.
A wide range of environmental sampling products
M-Tech provides a wide range of environmental sampling and sample collection products from sample collection and storage to surface, solid and water-core samplers. M-Tech provides a complete range of Whirl-Pak sample bags, manufactured by Nasco in the USA, for sampling, transport, storage and blending. The Sludge Judge sludge sampling range allows easy and accurate readings to be taken of settled solids, while the Swing and Tank samplers allow simple liquid sample collection from otherwise awkward situations. Also manufactured by Nasco are a wide range of solid sampling products, from spoons and scoops to ice and grain samplers.
M-Tech supply a comprehensive range of filtration equipment and consumables, from filter papers and membranes to vacuum manifolds and disposable filter monitors.
For more information, see the specific product pages:
M-Tech sells a wide range of ampoule media manufactured by S&S BioPath in the USA for membrane filtration applications. Routinely available in this range are:
Nutrient pad sets (NPS) are sterile, dehydrated culture media, ready for immediate use after addition of water. Shelf life of the sealed original package at room temperature is at least one year. Nutrient pads sets (NPS) are obligatorily used in combination use with membrane filtration technique.
The Nutrient pads sets are made of biologicaly inert cellulose cardboard that does not bind the nutrient medium chemically as compared to conventional agar culture media.
M-Tech supplies a comprehensive range of conventional dehydrated media manufactured by Laboratorios Conda in spain. Under the brand Pronadisia, Conda supply: dehydrated culture media, agar, peptones and other media ingredients; microbiological control reagents for the food, brewing and beverage industries; diagnostic reagents for serology and haematology. Agar media and components are routinely available in 500g, 2.5kg and 5kg pack sizes. Larger pack sizes, up to 25kg, can be supplied on request.
Why? Because you are about the quality of you procedures for isolation and differenciation of pathogenic microorganisms, Because you need rapid and reliable results. Who? The company who pioneered chromogenic media, with the original Rambach agar. What? CHROMagar chromogenic media allow isolation and direct differentiation of several pathogenic microorganisms simply by the colour of the colonies.
M-Tech provide a wide range of cytology products manufactured by Scientific Device Laboratories in the USA. Featured products in the range:
Thermotote Portable IncubatorsM-Tech supply the Thermotote range of portable incubators for use in the field, car or lab benchtop, ideal for a wide-range of in-field applications.
CyTherm Temperature Monitoring SystemThe Cytherm temperature logger provides a rebust and easy to use temperature logging system.
Sample Preparation
Sample Processing
Consumables
A comprehensive range from Raven Biological Laboratories Inc.
M-Tech provides a wide range of biological and chemical indicators produced by Raven Biological Laboratories. All Raven products are manufactured in accordance with current Good Manufacturing Practices of the United States Food and Drug Administration and meet the standard established by U.S.P.
M-Tech supply a range of A-Bead immuno-magnetic beads, manufactured by Aureon BioSystems in Austria. The use of magnetic beads for sample processing has proven to be a useful, sensitive technique, employed in routine applications as well as in research. The primary technological advantage of using immuno-magnetic beads is their ability to bind to almost any defined target molecule, such as nucleic acids, proteins or whole cells with very high specificity.
Environmental Monitoring: Water and Sludge Samplers, Solid sampling, Whirl-Pak Bags
Environmental Sampling Products: Water and Sludge Sampling Solutions, Solid Sampling, Whirl-Pak Bags Sludge and Water Samplers Sludge and Liquid Sampling Solutions M-Tech supplies a comprehensive range of sludge and liquid sampling equipment manufactured by Nasco in the USA. The most popular of these is the Sludge Judge® range of samplers, designed to take accurate reading of settled solids, 5% or less, in a variety of liquids. Available as the Sludge Judge®, Sludge Judge® Ultra super strong and Sludge Judge® II large capacity, it is ideal for sewerage treatment plants, chemical plants and food processing facilities. The Sludge Judge® is made up from detachable 5` long sections which screw together. The basic unit ships with three sections, making up a 15` sampler, but additional extensions sections are available if a longer length is required. The Sludge Judge® and Sludge Judge® Ultra hold 1 oz per foot (89ml per 0.31m) and the Sludge Judge® II holds 6oz per foot (171ml per 0.31m). Also available for the Sludge Judge® are a 6` cleaning brush to aid cleaning the unit after use and a cotton carry case, which holds four sections and the cleaning brush. If you need to take liquid samples, why not check out the Swing Sampler, ideal for collecting liquids from a flowing stream such as sewers. The end of the Swing Sampler rotates allowing the sampling angle to be controlled form 0 to 90 degrees. The Swing Sampler comes with a 960ml polyethylene bottle with a screwtop lid. Need to take a sample form a specific depth? Why not use a Tank Sampler. Available as a 10` unit, the Tank Sampler is made up of two 5` sections which may be extended through the addition of middle sections. The Tank Sampler is easy to use: Screw the two sections together and lower the unit to the specific depth required (the sampler is marked in 1` (30cm) increments Pull and hold the stainless steel wire at the top which opens the valve allowing liquid to flow inside Release the wire allowing the valve to close, trapping the liquid inside To release the sample, hold the sampler in the middle at about a 15 degree angle and pull the wire, holding the end over an appopriate contained (such as a Whirl-Pak® bag) or press and hold the pin on the bottom against a hard surface such as a pail. This will release the valve and the sample will flow out Solid and Dry Samplers - for sampling a wide variety of solids and powders M-Tech supply the NASCO range of single use and reusable scoops, spoons, dippers, probes and tongs which are ideally suited to food & environmental sampling. The Sterilware® range of individually wrapped, sterile, disposable sampling implements provide the ideal tools for sampling a wide range of products. The SamplitTMP sample scoop and container system allows quick and easy sample collection and storage of a solid sample core. Each individually wrapped, sterile device consists of a scoop and container (192ml vial) in one handy package. The sturdy polystyrene scoop is moulded into the lid and the lid screws into the vial, creating a leak-free container. Samples can be immediately isolated in the clear, styrene vial and capped for storage and transport. To use, simply unscrew the scoop from the vial, push scoop into the item to be sampled, gently lift and rotate the scoop to collect the sample, pull the scoop out, and cover with the vial. Also available are a wide variety of both stainless steel and plastic dippers for liquid or powder sample collection, and probes and powder samplers for powders and grains. Whirl-Pak Sample Bags Puncture Proof Tabs Guaranteed Sterile Reduced Storage Space Easy Identification Leakproof Closure Development of Whirl-Pak® Sample Bags Developed over 35 ago, American-made Whirl-Pak® sample bags were the first sterile sample bags on the market. They were designed to provide milk haulers with a container for collecting samples of bulk produced milk. Whirl-Pak® sample bags made possible the ``universal sample system``. This means that the single sample can be used for all tests required for quality control, product content and legal compliance. Whirl-Pak® sample bags are made from a blended virgin, low-density polyethylene. The blend gives the bags two important characteristics: Exceptionally clear film, for maximum sample visibility Superior strength, producing an unbreakable sample container They may be used for taking samples of liquids, semi-solids or solids. Whirl-Pak sample bags ® are patented under US Patent No. 2,973,131 and other patents pending. Puncture Proof Tabs All Whirl-Pak® bags feature ``Puncture Proof Tabs``. This patented process means that the tape on the tab extends past the ends of the wire. The result is no sharp points which could puncture the bags, scratch a person`s hands, or puncture gloves. This important feature is found only on Whirl-Pak®, making it easier and safer to use than any other sampling bag. The ``Puncture Proof Tabs`` process is patented under US Patent No. 5,180,229. Guaranteed Sterile Ethylene Oxide Gas: Whirl-Pak® bags are sterilized with ethylene oxide gas. Only Whirl-Pak® bags go through this separate sterilization step after manufacturing; if you are not using a Whirl-Pak® bag, you are probably using a bag that has not gone through this important sterilization procedure. Look for the Whirl-Pak® Name. Each and every bag is clearly marked with ``Whirl-Pak®`` on the sample bags. If it doesn`t say Whirl-Pak® ...it`s not our patented sterilized sample bags. Standard Methods states ``For some applications, samples may be collected in pre- sterilized plastic bags.`` Whirl-Pak® sample bags meet this description. Reduced Storage Space Whirl-Pak® sample bags use only 10% or less space than other containers. Leakproof closure By whirling or tightly folding the tab over three times, the Whirl-Pak® bag becomes a leakproof closure or container, which eliminates loss of a valuable sample, mess, and a possible need to collect a new sample. Importance of Sample Collection Proper water and sludge sampling procedures are of vital importance. Laboratory findings are completely dependent on the quality of the sample collected. It is imperative that each sample collection be representative of the lot from which it came, and that it arrives at the laboratory in the same condition it was in at the collection point. All Whirl-Pak® sample bags are made in the USA.
Environmental Sampling Products: Water and Sludge Sampling Solutions, Solid Sampling, Whirl-Pak Bags
M-Tech supplies a comprehensive range of sludge and liquid sampling equipment manufactured by Nasco in the USA. The most popular of these is the Sludge Judge® range of samplers, designed to take accurate reading of settled solids, 5% or less, in a variety of liquids. Available as the Sludge Judge®, Sludge Judge® Ultra super strong and Sludge Judge® II large capacity, it is ideal for sewerage treatment plants, chemical plants and food processing facilities. The Sludge Judge® is made up from detachable 5` long sections which screw together. The basic unit ships with three sections, making up a 15` sampler, but additional extensions sections are available if a longer length is required.
The Sludge Judge® and Sludge Judge® Ultra hold 1 oz per foot (89ml per 0.31m) and the Sludge Judge® II holds 6oz per foot (171ml per 0.31m). Also available for the Sludge Judge® are a 6` cleaning brush to aid cleaning the unit after use and a cotton carry case, which holds four sections and the cleaning brush.
If you need to take liquid samples, why not check out the Swing Sampler, ideal for collecting liquids from a flowing stream such as sewers. The end of the Swing Sampler rotates allowing the sampling angle to be controlled form 0 to 90 degrees. The Swing Sampler comes with a 960ml polyethylene bottle with a screwtop lid.
Need to take a sample form a specific depth? Why not use a Tank Sampler. Available as a 10` unit, the Tank Sampler is made up of two 5` sections which may be extended through the addition of middle sections. The Tank Sampler is easy to use:
M-Tech supply the NASCO range of single use and reusable scoops, spoons, dippers, probes and tongs which are ideally suited to food & environmental sampling. The Sterilware® range of individually wrapped, sterile, disposable sampling implements provide the ideal tools for sampling a wide range of products.
The SamplitTMP sample scoop and container system allows quick and easy sample collection and storage of a solid sample core. Each individually wrapped, sterile device consists of a scoop and container (192ml vial) in one handy package. The sturdy polystyrene scoop is moulded into the lid and the lid screws into the vial, creating a leak-free container. Samples can be immediately isolated in the clear, styrene vial and capped for storage and transport. To use, simply unscrew the scoop from the vial, push scoop into the item to be sampled, gently lift and rotate the scoop to collect the sample, pull the scoop out, and cover with the vial. Also available are a wide variety of both stainless steel and plastic dippers for liquid or powder sample collection, and probes and powder samplers for powders and grains.
Development of Whirl-Pak® Sample Bags Developed over 35 ago, American-made Whirl-Pak® sample bags were the first sterile sample bags on the market. They were designed to provide milk haulers with a container for collecting samples of bulk produced milk. Whirl-Pak® sample bags made possible the ``universal sample system``. This means that the single sample can be used for all tests required for quality control, product content and legal compliance. Whirl-Pak® sample bags are made from a blended virgin, low-density polyethylene. The blend gives the bags two important characteristics:
They may be used for taking samples of liquids, semi-solids or solids. Whirl-Pak sample bags ® are patented under US Patent No. 2,973,131 and other patents pending.
All Whirl-Pak® bags feature ``Puncture Proof Tabs``. This patented process means that the tape on the tab extends past the ends of the wire. The result is no sharp points which could puncture the bags, scratch a person`s hands, or puncture gloves. This important feature is found only on Whirl-Pak®, making it easier and safer to use than any other sampling bag. The ``Puncture Proof Tabs`` process is patented under US Patent No. 5,180,229.
Ethylene Oxide Gas: Whirl-Pak® bags are sterilized with ethylene oxide gas. Only Whirl-Pak® bags go through this separate sterilization step after manufacturing; if you are not using a Whirl-Pak® bag, you are probably using a bag that has not gone through this important sterilization procedure. Look for the Whirl-Pak® Name. Each and every bag is clearly marked with ``Whirl-Pak®`` on the sample bags. If it doesn`t say Whirl-Pak® ...it`s not our patented sterilized sample bags. Standard Methods states ``For some applications, samples may be collected in pre- sterilized plastic bags.`` Whirl-Pak® sample bags meet this description.
Reduced Storage Space Whirl-Pak® sample bags use only 10% or less space than other containers.
Leakproof closure By whirling or tightly folding the tab over three times, the Whirl-Pak® bag becomes a leakproof closure or container, which eliminates loss of a valuable sample, mess, and a possible need to collect a new sample.
Proper water and sludge sampling procedures are of vital importance. Laboratory findings are completely dependent on the quality of the sample collected. It is imperative that each sample collection be representative of the lot from which it came, and that it arrives at the laboratory in the same condition it was in at the collection point. All Whirl-Pak® sample bags are made in the USA.
Membrane Filtration Equipment
M-Tech supplies a comprehensive range of membrane filtration equipment and consumables, from filter papers and filter membranes to vacuum manifolds and disposable filter monitors. Membrane Filters Products for Membrane Filtration M-Tech supply a wide range of filtration equipment supplied by Advantec MFS. Membrane filters are microporous plastic films made from a variety of polymers. Since the commercial introduction of membrane filters 30 years ago, they have become widespread for use in industrial/process and research applications. The versatility and unique physiochemical properties of membrane filters have made ``membrane filters`` a common phrase. Membrane filters, microporous filters, screen or sieve filters are all synonyms for filters with specific pore ratings which retain particles or microorganisms larger than their pore size by surface capture and some particles smaller than the stated pore size by other mechanisms. Such filters usually have a rated pore size within the range of 0.1-5µm. This type of filter is referred to as a membrane. Advantec MFS membranes (with the exception of PTFE and PCTE) are reverse phase, solvent cast membranes. Here, controlled evaporation or removal of the complex solvent systems forms the porous structure. Reverse phase membranes are available in Nitrocellulose, Cellulose Acetate, Mixed Cellulose Esters and Nylon. PTFE membranes are made by a patented process where the membranes are stretched biaxially to form the porous structure. Important performance characteristics of Advantec MFS membranes: Thin, high porosity - Typically, a single layer of membrane is approximately 150µm thick with a porosity of approximately 80%. Pore ratings represent mean values around which there is a distribution of pores. These porous filters exhibit high liquid flow rates and high gas flow rates per unit area. In addition, one must consider there is a very high surface area available for selective adsorption or nonspecific binding. Strength - Advantec MFS membranes are monitored for both burst (longitudinal) and tensile (lateral) strength. Supported Acetate and Nylon are the strongest reverse phase membranes are available from Advantec MFS, followed by Cellulose Acetate. All membranes will withstand autoclaving. Consult the specifications for more complete information. Chemical and Biological Cleanliness - Membrane cleanliness is affected by the raw materials that are used in the manufacturing process, membrane treatments and by the way the membrane is handled after the casting operation. To assure membrane cleanliness, Advantec MFS uses only high purity reagents and raw materials. Once cast, the membranes are handled in a class 100 clean room to minimise ambient contamination. Some membranes will contain 0.1-3(wt%) of an aqueous wetting agent. Cellulose Acetate membranes have a lower aqueous extractable, 0.1(wt%), nitrocellulose the highest 3.0(wt%).Thermostability - All Advantec MFS membranes can be sterilised by autoclaving. Advantec MFS membranes can be used over a broad range of temperatures. Cellulose Acetate membranes can withstand 130ºC, Nylon will withstand 180ºC. Specific maximum temperature limits can be found in the catalog (contact us for one). In addition, these membranes exhibit minimal shrinkage at elevated temperatures. Cellulose Acetate membranes should be pre-wet prior to loading then in the holder and autoclaving. Choosing the correct membrane filter for your needs: Determine what liquid or gas will be filtered Determine the maximum pore size required to achieve the results you want Using the chemical compatibility chart, determine which polymer types are available Identify any unusual process conditions that would otherwise limit your choice of membrane Choose your preferred pack size Disposable Filter Monitors M-Tech supplies a range of sterile disposable filter monitors, which may be used to eliminate some of the time consuming activities associated with traditional filtration methods (such as sterilisation of filtration units, etc), manufactured in the US by BioPath Inc. Disposable Filter Monitors are available pre-sterilised, removing the requirement of sterilising the filtration equipment, and eliminating any risk of cross contamination associated with transferring a membrane from a packet to a filter unit. The Disposable Filter Monitors are constructed with a removable funnel, allowing you run a 100ml sample, which may then be discarded after use. Disposable Filter Monitors are available with a removable membrane allowing the membrane to be transferred to an agar plate for processing as traditional methods. Available with White (nitrocellulose) and Black (mixed-ester) membranes in 0.2μm and 0.45μm pore size, 47mm or 56mm diameter fixed or removable membrane. All Disposable Filter Monitors units have 100ml removable sample reservoir. The membrane is fixed in place for use with broth media. Surface area 25% greater than with a 47mm membrane. NanoCeram® High Flow Rate Alumina Filters For high flow rate filtration with 99.999% bacterial, viral and protozoa retention NanoCeram® is a novel material developed by Argonide Corp. Orlando U.S.A. for the seperation of proteins and biological solutions. The unique NanoCeram filtration material retains 99.9999% protozoa such as Cryptosporidium (>5 logs), bacteria and viruses at flow rates more than 200 times greater than equivalent virus-rated filter membranes. NanoCeram® has been shown to be highly effective in a wide variety of applications: Production of potable water Sterilisation of pharmaceuticals and medical sera Chromatography filtration of DNA/RNA and endotoxins Support matrix for bioengineering Collection of biowarfare agents
M-Tech supplies a comprehensive range of membrane filtration equipment and consumables, from filter papers and filter membranes to vacuum manifolds and disposable filter monitors.
M-Tech supply a wide range of filtration equipment supplied by Advantec MFS. Membrane filters are microporous plastic films made from a variety of polymers. Since the commercial introduction of membrane filters 30 years ago, they have become widespread for use in industrial/process and research applications. The versatility and unique physiochemical properties of membrane filters have made ``membrane filters`` a common phrase.
Membrane filters, microporous filters, screen or sieve filters are all synonyms for filters with specific pore ratings which retain particles or microorganisms larger than their pore size by surface capture and some particles smaller than the stated pore size by other mechanisms. Such filters usually have a rated pore size within the range of 0.1-5µm. This type of filter is referred to as a membrane.
Advantec MFS membranes (with the exception of PTFE and PCTE) are reverse phase, solvent cast membranes. Here, controlled evaporation or removal of the complex solvent systems forms the porous structure. Reverse phase membranes are available in Nitrocellulose, Cellulose Acetate, Mixed Cellulose Esters and Nylon. PTFE membranes are made by a patented process where the membranes are stretched biaxially to form the porous structure.
Thin, high porosity - Typically, a single layer of membrane is approximately 150µm thick with a porosity of approximately 80%. Pore ratings represent mean values around which there is a distribution of pores. These porous filters exhibit high liquid flow rates and high gas flow rates per unit area. In addition, one must consider there is a very high surface area available for selective adsorption or nonspecific binding. Strength - Advantec MFS membranes are monitored for both burst (longitudinal) and tensile (lateral) strength. Supported Acetate and Nylon are the strongest reverse phase membranes are available from Advantec MFS, followed by Cellulose Acetate. All membranes will withstand autoclaving. Consult the specifications for more complete information. Chemical and Biological Cleanliness - Membrane cleanliness is affected by the raw materials that are used in the manufacturing process, membrane treatments and by the way the membrane is handled after the casting operation. To assure membrane cleanliness, Advantec MFS uses only high purity reagents and raw materials. Once cast, the membranes are handled in a class 100 clean room to minimise ambient contamination. Some membranes will contain 0.1-3(wt%) of an aqueous wetting agent. Cellulose Acetate membranes have a lower aqueous extractable, 0.1(wt%), nitrocellulose the highest 3.0(wt%).Thermostability - All Advantec MFS membranes can be sterilised by autoclaving. Advantec MFS membranes can be used over a broad range of temperatures. Cellulose Acetate membranes can withstand 130ºC, Nylon will withstand 180ºC. Specific maximum temperature limits can be found in the catalog (contact us for one). In addition, these membranes exhibit minimal shrinkage at elevated temperatures. Cellulose Acetate membranes should be pre-wet prior to loading then in the holder and autoclaving.
Choosing the correct membrane filter for your needs:
M-Tech supplies a range of sterile disposable filter monitors, which may be used to eliminate some of the time consuming activities associated with traditional filtration methods (such as sterilisation of filtration units, etc), manufactured in the US by BioPath Inc.
Disposable Filter Monitors are available pre-sterilised, removing the requirement of sterilising the filtration equipment, and eliminating any risk of cross contamination associated with transferring a membrane from a packet to a filter unit. The Disposable Filter Monitors are constructed with a removable funnel, allowing you run a 100ml sample, which may then be discarded after use.
Disposable Filter Monitors are available with a removable membrane allowing the membrane to be transferred to an agar plate for processing as traditional methods.
Available with White (nitrocellulose) and Black (mixed-ester) membranes in 0.2μm and 0.45μm pore size, 47mm or 56mm diameter fixed or removable membrane.
All Disposable Filter Monitors units have 100ml removable sample reservoir. The membrane is fixed in place for use with broth media. Surface area 25% greater than with a 47mm membrane.
For high flow rate filtration with 99.999% bacterial, viral and protozoa retention
NanoCeram® is a novel material developed by Argonide Corp. Orlando U.S.A. for the seperation of proteins and biological solutions. The unique NanoCeram filtration material retains 99.9999% protozoa such as Cryptosporidium (>5 logs), bacteria and viruses at flow rates more than 200 times greater than equivalent virus-rated filter membranes.
NanoCeram® has been shown to be highly effective in a wide variety of applications:
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