Paper filters are manufactured by the random deposition of cellulose fibers in slurry, onto the screen of a papermaking machine. The type, size and density of the fibers and the level of compaction and thickness of the mat determine the grade of the filter. Depending on the application, the paper is futher treated to enhance specific characteristics of strength, hardness and chemical resistance or is acid washed to reduce impurities and the ash content of filters used in gravimetric analysis.

Qualitative Filters are used for general laboratory applications which identify or separate precipitates or other particulate matter from a mixture.

QL1 Retention 15 - 25 µm. Very fast flow rate, general purpose filter. Suitable for gas filtration, air pollution analysis, retention of large crystalline particles and gelatinous precipitates such as ferric and aluminium hydroxide. Also useful for cleanup of biological fluids and organic extracts.

QL2 Retention 8 - 12 µm. Fast flow rate, general purpose filter. Frequently used for clarifying fluids. Also suitable for pollution analysis and retention of medium crystalline particulates such as lead sulfate, calcium carbonate and hot calcium oxalate.

QL232 Retention 5 -10 µm. Medium to slow flow rate, general purpose filter. Suitable as a media to hold soil nutrients in plant growth studies.

QL131 Retention 3 - 6 µm. Slow flow rate, general purpose filter. High retention of fine particles and crystalline precipitates such as barium sulfate. Suitable for clarifying cloudy suspensions and boiler water analysis.

Quantitative Filters are acid washed and are suitable for gravimetric and other critical analysis where background contamination is undesirable.

QN 5A Retention 15 - 25 µm. Fast flow rate, general purpose filter. This is a double acid washed paper suitable for the retention of coarse particles and gelatinous precipitates. Recommended for filtering hydroxides and metallic aerosols and determining silica content in steels. Also used in quantitative air pollution analysis and foodstuffs analysis.

QN 5B Retention 5 - 10 µm. Medium flow rate, general purpose filter. This product has been subjected to a double acid wash in HCI and has good chemical resistance and wet strength. Suitable for quantitative analysis of soils fertilizers, cement and minerals. Also used in the collection of trace elements and radionucleotides from the atmosphere.

QN 5C Retention 2 - 5 µm. Slow flow rate. High retention filter for critical gravimetric analysis and separation of precipitates that tend towards colloidal dispersion.
QN 7 Retention 2 - 10 µm. Medium flow rate. This is the highest purity quantitative paper available. Suitable for analyses of minute trace and precious metals and for research laboratories where precision is a high priority.

QN 4A Retention 2 - 3 µm. Very slow flow rate. This acid washed paper is futher treated with nitric acid to harden the paper for superior wet strength and eliminate shedding of fibers. It has excellent pH and chemical resistance. Suitable for retaining fine crystalline particulate and use under pressure.

Special Purpose
Pre-Pleated Paper Filters are offered in two disc diameters. Retention rating of 3 to 10 microns.
Sugar Paper Filters are used to clarify sugar solutions prior to examination by polarmetric methods to determine the sucrose content. It can also be used for many other applications requiring a fast flow rate.
Phase Separating Filters are used to separate aqueous from non aqueous phases. Retention rating of 5 to 10 microns.

Qualitative Papers Qty/Pkg: 100 filters   QL1 QL2 QL232 QL131 Whatman Equivalent #4 #1 #2 #3 OR #6 Retention µm 15 - 25 µm 8 - 12 µm 5 - 10 µm 3 - 6 µm Diameter (cm)         5.5 cm 7.0 cm 11.0 cm 12.5 cm 15.0 cm 18.5 cm 24.0 cm	Quantitative Papers Qty/Pkg: 100 filters   QN 5A QN 5B QN 5C QN 7 QN 4A Whatman Equivalent #41 #40 #42 #44 #50 Retention µm 15 - 25 µm 5 - 10µm 2 - 5 µm 2 - 10 µm 2 - 3 µm Diameter (cm)           5.5 cm 7.0 cm 11.0 cm 12.5 cm 15.0 cm 18.5 cm 24.0 cm
Special Purpose Paper Filters Qty/Pkg: 100 filters   Prepleated Sugarpaper Phase Separating Diameter (cm) QL 542 SP 106 PS2S 12.5 cm NA 15.0 cm Please Contact us if the product you require is not listed.

Seamless, high purity extraction thimbles are available in cellulose, glass fiber and quartz fiber to meet your critical analytical needs. Typical applications are Environmental Analyses, Estimation of fat in foods, Vitamin A and carotene extractions; analysis of laquer binder in paints etc.

Qty/Pkg: 25 Thimbles per box
	Cellulose	Glass Fiber	Quartz Fiber
Diameter x Height (mm)	C84	G86R	S88R
19 x 90 mm
25 x 100 mm
30 x 100 mm

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The method of manufacture of Glass and Quartz fiber filters is very similar to that of paper filters. Retention efficiency is however, superior to that of paper. Unlike cellulose fibers that swell when wetted, glass fiber filters maintain their dimensional stability and provide a superior chemical resistance and dirt holding capacity as well as biological inertness. Binder free borosilicate glass fiber filters are heat resistant to about 500 ° C. For temperatures up to 1000 ° C the Quartz (SiO2) microfiber filters are typically used.

Grades of Glass Fiber FiIters

G/A55 Retention 1.6 µm . General purpose glass fiber filter recommended for air & water pollution monitoring, filtration of protein, bacteria cultures, etc. Recommended for radioimmunoassays of weak beta emitters and for food analyses.

G/B140 Retention 1.0 µm . Thick filter offering high wet strength and dirt holding capacity. Good as membrane prefilter, and for industrial waste analyses.

G/C50 Retention 1.2 µm . Recommended for suspended solids analysis of water and wastewater Low absorption make this filter ideal for scintillation counting

G/F75 Retention 0.7 µm . Often used to collect IgC or other very fine protein precipitates or for clarifying chemically aggressive solutions. Also suitable for analysis of chlorophyll “a”.

Q/R100 Retention 1.5 µm . This high purity Quartz (Si02) microfiber filter is specially prefiired at 900° C for two hours to reduce organic contamination. Recommended for sampling acidic gases at temperatures exceeding 500° C. Also suitable for carbon detection in aqueous studies.

Qty/Pkg: 100 filters * = 50 filters/pkg
	G/A55	G/B140	G/C50	G/D120*	G/F75	Q/R100
Whatman Equivalent	GF / A	GF / B	GF / C	GF / D	GF / F	QM / A
Thickness (mm)	0.22	0.56	0.19	0.52	0.35	0.39
Particle Retentiton (Fluid)	1.6 µm	1.0 µm	1.2 µm	2.7 µm	0.7 µm	0.39 µm
0.3 µm DOP Retention	99.9%	99.9%	99.9%	97%	99.9%	99.9%
Binder	None	None	None	None	None	None
21 mm
25 mm
37 mm
47 mm
55 mm
90 mm
142 mm
8" x 10"

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Chemically resistant, non migrating spun bonded polyester drain discs are used as spacers between filters and supports to minimize “pore blinding' or blockage of membrane filters.

Diameter	Qty/Pkg
13 mm	100
25 mm	100
42 mm	100
47 mm	100
90 mm	50
142 mm	25
293 mm	25

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	Membrane filters feature precise pore sizes for exact filtration and screening. The following are some of the types of filters offered by AMD.
	Cellulose Nitrate/MCE. Water extractables are less than 2.5% (wt.) and temperature tolerance up to 127°C. Nitrocellulose membranes and Mixed Cellulose Esters (MCE) are ideal for filtration of aqueous solutions, analytical research and microbiological analyses. The filters are suitable for hybridization studies, immunoassays and cell based assays. The high porosity (80%) makes this the filter of choice where maximum throughput is required.
	Cellulose Acetate. Water extractables are less than 0.1 % (wt.) and the temperature tolerance up to 180° C. The intrinsic low binding properties of this filter make it superior where protein loss of the sample is to be minimized. The improved chemical compatibility of this product over cellulose nitrate enable it to be used for filtration of low molecular weight alcohols as well as clarification and sterilization of aquous fluids, alcohols, tissue culture media, protein samples, filtration of radio tracer solutions, opthalmics etc.
	Nylon. Water extractables are less than O.3% (wt.) & temperature tolerance up to 180 ° C. Nylon filters display high protein binding properties. Its excellent chemical compatibility with common solvents, bases and esters make it an ideal choice for use in the HPLC laboratory.
	PTFE (Polytetrafluorethylene). The hydrophobic nature of teflon and its broad chemical compatibility make it the filter of choice for filtration of air and gases, for use as vents and for clarification of acids, bases and solvents. The teflon membrane needs to be prewet with alcohol before aqueous solutions can be filtered. To overcome problems with handling the teflon membrane is laminated to a polypropylene web support. This lamination process restricts the temperature tolerance of the teflon to that of polypropylene (130°C .)
	Silver. The unique chemical and thermal stability make this membrane especially valuable for those applications involving filtration of aggressive fluids and/or use at high temperatures up to 550°C. They are ideal collection media for analysis of crystalline silica by X-Ray diffraction or analysis of organic materials. Silver membrane can be cleaned and reused.
	Polycarbonate. Polycarbonate membrane filters are a two dimensional submicron microporous seive consisting of a precisely controlled cylindrical pore structure. The unique characteristics of the filter make it ideally suited in applications where discrete separation or fractionation of particles, or surface capture on a single plane for subsequent microscopic examination is desired. The membrane has negligible water extractables and low non specific binding characteristics. It has good chemical resistance and thermal stability (140° C.) Its resistance to staining make it ideal for use in cytology. Polycarbonate filters have a relatively low porosity, as a result its dirt holding capacity and throughput is limited.
	Filters for Diagnostic Cytology. The use of filters as an aid in Cytodiagnosis has been well documented and accepted. A.M.D. Manufacturing provides both the polycarbonate and cellulose acetate membrane filters to satisfy the critical demands of most users.

Cellulose Nitrate/MCE, Plain; White; Non Sterile Size 0.1 µm 0.2 µm 0.45 µm 0.8 µm 1.2 µm 3.0 µm 5.0 µm 13 mm (100 per Pkg) 25 mm (100 per Pkg) 47 mm (100 per Pkg) 90 mm (25 per Pkg) 142 mm (25 per Pkg)
Cellulose Acetate, Plain; White; Non Sterile Size 0.2 µm 0.45 µm 0.8 µm 3.0µm 13 mm (100 per Pkg) 25 mm (100 per Pkg) 47 mm (100 per Pkg) 90 mm (25 per Pkg) 142 mm (25 per Pkg)	Nylon, Plain; White; Non Sterile 100 per Pkg. Size 0.2 µm 0.45 µm 13 mm 25 mm 47 mm
Silver Filters Size 0.2 µm 0.45 µm 0.8 µm 1.2 µm 3.0 µm 5.0 µm 25 mm (50 per Pkg) 37 mm (25 per Pkg) 47 mm (25 per Pkg)	PTFE (Teflon), Plain; White; Non Sterile 100 per Pkg. Size 0.2 µm 0.45 µm 1.0 µm 13 mm 25 mm 47 mm
Polycarbonate (PCTE) Plain; Non Sterile 100 per Pkg. Size 0.05 µm 0.08 µm 0.10 µm 0.20 µm 0.40 µm 0.80 µm 1.00 µm 3.00 µm 5.00 µm 8.00 µm 20.0 µm 13 mm 25 mm 47 mm

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Special Purpose Membrane Filters are available in a variety of media and pore sizes. These include Black Polycarbonate membranes for use in epiflourescence microscopy and organism detection. Other special purpose membranes include Polyester and Polycarbonate membranes for use in measuring (AOX) Organic Halides in water and wastewater. For Biological testing, AMD Biological membranes with special gridded surfaces or hydrophobic edges can be used. A special 85 mm Cellulose Acetate membrane is used for rapid enumeration of coliform bacteria in foods.

Black PCTE Membranes 100/Pkg. (For Epifluorescent Microscopy)					0.4 µm AOX Membranes 100/Pkg. (Analysis of Organic Halides in Water/Wastewater)
	0.1 µm	0.2 µm	0.4 µm	0.8 µm	Polycarbonate	Polyester
13 mm					NA	NA
25 mm
47 mm

Cellulosic Membrane Sterile Individual Pack for Biological Testing
	0.2 µm	0.45 µm	0.8 µm
47 mm, White, Plain, 100/Pkg.
47 mm, White, Grid, 100/Pkg.
47 mm, White, Grid, 200/Pkg.	NA		NA
47 mm, White, Grid, 1000/Pkg.	NA		NA
47 mm, Hydrophobic Edge, Plain, 100/Pkg.	NA		NA
47 mm, Hydrophobic Edge, Grid, 100/Pkg.	NA		NA
47 mm, Black, Plain, 100/Pkg.	NA
47 mm, Black, Grid, 100/Pkg.	NA
85 mm, White, Plain, 100/Pkg.			NA

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AMD Syringe filters, with Luer connections, are available sterile and non sterile in a selection of different types of membrane filters and housing materials.

The following may be used as a guide:

• Cellulose Acetate (Intrinsically low binding) - Filtration of biological fluids, tissue culture media, enzymes, proteins, hybridization buffers, groundwater samples and most general filtration applications.
• Nylon - Suitable for most HPLC applications.
• P.T.FE. - Ideal for use as vents, as well as clarification of acids, bases & solvents.
• Membranes with Glass fiber prefilters - suitable for filtration of dirty samples or difficult to filter fluids

3mm Diameter; EFA 0.1 cm2; Holdup Volume <0.01 ml.; Process Volume <2 mls.
		NON STERILE			STERILE
Membrane	Housing	Oty/pkg.	0.2 µm	0.45 µm	Oty/pkg.	0.2 µm	0.45 µm
Cellulose Acetate	Polypropylene	100			50
Nylon	Polypropylene	100			NA	NA	NA
PTFE	Polypropylene	100			NA	NA	NA
13mm Diameter; EFA 0.9 cm2; Holdup Volume <0.03 ml.; Process Volume <10 mls.
		NON STERILE			STERILE
Membrane	Housing	Oty/pkg.	0.2 µm	0.45 µm	Oty/pkg.	0.2 µm	0.45 µm
Cellulose Acetate	Polypropylene	100			100
Nylon	Polypropylene	100			100
PTFE	Polypropylene	100			NA	NA	NA
25 / 30 mm Diameter; EFA 4.0 cm2; Holdup Volume <0.1 ml.; Process Volume <100 mls.
		NON STERILE			STERILE
Membrane	Housing	Oty/pkg.	0.2 µm	0.45 µm	Oty/pkg.	0.2 µm	0.45 µm
Cellulose Acetate	Modified Acrylic	50			50
Nylon	Polypropylene	50			NA	NA	NA
PTFE	Polypropylene	50			50		NA
50mm Diameter Hose Barb; EFA 19.6 cm2; Holdup Volume <3.0 ml.; Process Volume <500 mls.
		NON STERILE			STERILE
Membrane	Housing	Oty/pkg.	0.2 µm	0.45 µm	Oty/pkg.	0.2 µm	0.45 µm
Cellulose Acetate	Polypropylene	10			10
PTFE	Polypropylene	10			10		NA
25 / 30 mm Syringe Filters with Membrane and Glass Fiber Prefilter (For Difficult to Filter Solutions)
		NON STERILE			STERILE
Membrane	Housing	Oty/pkg.	0.2 µm	0.45 µm	Oty/pkg.	0.2 µm	0.45 µm
Cellulose Acetate	Modified Acrylic	50			50
Nylon	Polypropylene	50			NA	NA	NA
PTFE	Polypropylene	50			NA	NA	NA

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Sterile, Pyrogen free, AMD 50 mm snug fitting Petri Dishes are manufactured from optically transparent polystyrene. The unique design of these dishes enable one handed opening and free circulation of air between stacked dishes during incubation. Each box consists of five polyethylene sleeves containing 20 dishes each. Dishes are available with and without absorbent pads as well as tissue culture treated for cell growth.

Applications

• Storage and Transport of Laboratory Specimens
• Classroom Observations
• Microbial Assays by ME Techniques
• Tuberculosis and Rabies Culturing
• Antibiotic Assays
• Antimicrobial and Susceptibility Testing
• Plant Tissue Culture
• Adherent Cells and Suspension Cultures

Description	100 per package	1000 per package
Petri Dish, NO Pads
Petri Dish WITH Pads

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AMD microbiological media/reagent is available in 2 mls. ampoules, pre-measured to ensure optimum growth during analysis of microbial contamination of foods, beverages.

Description	50 per package
M-Green Yeast & Mold Broth, 2mls.
TG-E Total Count Broth, 2mls.
M-Endo Total Coliform Broth, 2mls.

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The versatile design of AMD filtration device allow it to be used for a wide variety of applications. The unit can be used for the general filtration or sterilization of fluids or as an analytical tool for the detection or monitoring of microbiological or particulate contamination. The unit consists of a lid, funnel and base with a membrane filter sealed in place. The funnel is removable allowing the unit to be converted into a petri dish or storage container. Luer fittings allow for standardization.

Biological Analytical Devices 50 per package Polystyrene, Sterile, Pyrogen Free Microbiological Analysis of : Beverages Filter Cellulosic Foods Cosmetics Shampoos Fluids Dialysis Fluids Clinical Bacteriology Water and Wastewate
Filter	Pore Size	Colour	Type	Qty
Cellulosic	0.45 µm	White	Gridded
Cellulosic	0.45 µm	Black	Gridded
Cellulosic	0.80 µm	Black	Gridded
Sterility Testing Devices 50 per package Polystyrene, Sterile Pyrogen Free, Luer Inlet & Outlet Individually Bagged Applications: Pharmaceuticals Opthalmic Solutions Sterile Preparations Devices Fluids etc. Cold Sterilization/ Clarification of Media Cell Concentration/ Washing/Recycling Diafiltration
Filter	Pore Size	Colour	Type	Qty
Cellulosic	0.2 µm	White	Plain
Cellulosic	0.45 µm	White	Plain
Cellulosic	0.45 µm	White	Gridded
Cellulosic	0.45 µm	Black	Gridded
Cellulosic	0.80 µm	Black	Gridded
General Filtration/Clarification Device 12 per package Polypropylene Non Sterile, Luer Inlet & Outlet Applications Filtration of HPLC Solvents General Filtration of Fluids Patch Testing of Boiler Fluids & Fuels
Filter	Pore Size	Colour	Type	Qty
Cellulose Acetate	0.45 µm	White	Plain
Cellulose Acetate	0.80 µm	White	Plain
Nylon	0.45 µm	White	Plain

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13 mm & 25 mm Glass Microanalysis Holders   Description Qty 13 mm Sintered glass support (each) 25 mm Sintered glass support (each) 25 mm Stainless steel support (each)	47 mm & 90 mm Glass Microanalysis Holders   Description Qty 47 mm Sintered glass support (each) 47 mm Stainless steel support (each) 90 mm Sintered glass support (each) 90 mm Stainless steel support (each)
25 mm & 47 mm Plastic Microanalysis Holders   Description Qty 25 mm In line Polypropylene (6/ Pkg) 47 mm In line Polypropylene (each) 47 mm Aerosol Polypropylene (each) 47 mm Device Polypropylene (12/Pkg) 25 mm In line PFA (each) 47 mm In line PFA (each)	304 Grade Stainless Steel Syringe Filter Holder (Fit syringes with standard Luer fittings)   Description Qty 13 mm Syringe Holder (each) 25 mm Syringe Holder (each)
	Manifolds Description Qty 3 Station Stainless Manifold 6 Station Stainless Manifold
Environmental Monitors   Description Qty 37 mm 2 Piece Polystyrene (50/Pkg) 37 mm 3 Piece Polystyrene (50/Pkg) 25 mm 0.8 µm (MCE) Membrane (100/Pkg) 37 mm 0.8 µm (MCE) Membrane (100/Pkg) 37 mm Support Pad	PVC Multiple Branch Manifolds Description Qty 3 Branch PVC Manifold 6 Branch PVC Manifold

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