SAMPLE ANALYSIS INSTRUMENTATION

Sieve Analysis Field Kit
Sand Gage
Geotechnical Gage
Handheld Size Analyzer
Plastic Sieve Ring
Mini Sieve
Screen Sieve Set
ASTM Testing Sieves
SieveMaster Software
Riffle Splitter
LISST-25
Size Analyzers
Hydrometers
Sample Splitters
Field & Lab Balances
Step-Down Transformer
Sieve Shakers
Wash Bottles
Brushes
Stainless Steel Accs.
Aluminum Pan & Foil
Utility Tapes
Decon Brushes & Wipes
Containers
Glassware
Laboratory Ovens
Hot Plate
Droppers
Digital Timer
Forceps & Tweezers
Desiccators
Stirrer & Stirrer Bar
Merit Water Still
Portable Lab Burner
Filtration
Sampling Tubing

 



Filtration

Filtration Equipment ] Vacuum Filtration Assemblies ] Oilless Vacuum/Pressure Pumps ] Series I and Series II Peristaltic Pumps ] Filter Holders ] Disposable In-line Filters ] [ Filter Membranes ] USGS Sandstrom Organic-Compound Plate Filter Assembly ]

Filter Membranes

Membrane filters are used with the barrel filter holder, plate-type in-line filter holder and the in-line filter holders. These filter membranes are used primarily for water quality sampling filtration for trace metals and chemical analysis. The standard filter membranes are offered in four basic materials.

Cellulose Acetate Membrane recommended for most analytical filtration applications. Made of cellulose triacetate and diacetate, they are highly flexible with a high burst and tensile design strength. These membranes have the lowest extractable level at 0.1% (by wt.), improved heat resistance, low protein binding, and are resistant to low molecular weight alcohols.

Cellulose Nitrate Membrane may be used in most Cellulose Acetate applications. Made of pure Cellulose Nitrate, they are typically 80% porous, allowing for excellent flow rates. They have a slightly higher extractable level at 3% (by wt.) and are composed of glycerin and wetting agent.

PTFE Membrane (TEF) are highly porous and resistant to most acids, bases and chemically aggressive solvents. They are naturally hydrophobic making them difficult to use in common filtration of aqueous solutions.

Glass Fiber Pre-filters are highly recommended for sediment laden samples to reduce the particulate loading on the membrane surface. A pre-filter will greatly extend the life of the membrane. They are exceptionally pure, containing no binder that could alter the filtrate. These are also used for sediment analysis and are listed with our Whatman glass microfiber filter papers.

TEF Filter Membrane

  • Pure TEF TFE
  • 10 membranes per package

511-217      Coarse Grade- 20-30 micron maximum pore size, 47 mm diameter by .10 mm thickness

511-218      Medium Grade- 5-6 micron maximum pore size, 47 mm diameter by .10 mm thickness

511-219      Fine Grade- 1-2 micron maximum pore size, 47 mm diameter by .25 mm thickness

511-220      Very Fine Grade- .45 micron pore size, 47 mm diameter by .07 mm thickness

511-221      Finest Grade- .2 micron pore size, 47 mm diameter by .065 mm thickness

 

 

 

1700 JOYCE AVENUE  COLUMBUS, OH 43219   U.S. Only: 1-800-561-9677   PHONE: 1-614-297-9877  FAX: 1-614-297-9878  sales@rickly.com

COPYRIGHT   1997-2009, RICKLY HYDROLOGICAL COMPANY.  ALL RIGHTS RESERVED