Waters Associates—Leader in Gel Permeation/Liquid Chromatography A complete line of analytical and preparative chromatographs, unique packing materials, and custom analytical
and materials separation services—total capabilities in liquid chromatography from Waters Associates, Inc.
R-4 Differential Refractometer
INSTRUMENTS Gel permeation chromatograph for high-temperature operation
Manual preparative chromatograph
The most generally useful liquid chromatography detector on the market. Can be used with more sample-solvent systems than any other detector. Sensitive, stable and non-destructive. Circle No. 49
Chromato-PrepTM
GPC-200 The most complete and accurate gel p e r m e a t i o n c h r o m a t o g r a p h (GPC) presently available for measuring the molecular weight distribution of polymeric materials. Completely automatic operation up to 150°C. Circle No. 43
Room temperature, manual, preparative chromatograph for GPC, liquid-liquid, and liquid-solid separations. Provides gram quantities of narrow molecular weight fractions, or fractions of highly purified chemical species. Circle No. 46
Analytical liquid chromatograph Gel permeation chromatograph for room-temperature operation
COLUMN PACKING MATERIALS Durapak™ An entirely new material for both gas and liquid chromatography. The liquid phase is chemically bounded to the support, never bleeds. Very high separation efficiencies, many other important advantages. Circle No. 50 Porapak® The original porous polymer packing for gas chromatography. May be used with or without liquid coatings. No bleed; stable at high temperatures; no adsorption of polar compounds; rapid overload recovery. Circle No. 51
GPC-300 U M ^ ^ ^ V Provides rapid molecular weight distribution determination of any polymer soluble in a low-viscosity solvent. Compact, bench-top mounted. Circle No. 44 Analytical / preparative gel permeation chromatograph
ALC-100 A fast, versatile liquid chromatograph which performs separations in any of three modes: liquid-liquid partition, liquid-solid adsorption, or molecular size. Accessories include recycle and gradient elution systems. Circle No. 47
Automatic organic acid analyzer
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ANALYTICAL CHEMISTRY
Others Waters also supplies Corning® CPG packings for liquid chromatography, and Porasil® for liquid and gas chromatography. Write for information. Circle No. 53 For more information on any of the above instruments or packing materials, or for custom separation services, write to Waters Associates, Inc., 61 Fountain Street, Framingham, Mass. 01701. Telephone (617) 879-2000.
Ana-PrepTM GPC Automatic, high temperature, preparative gel permeation chromatograph for polymer fractionations. Handles 1-2 gram loads of high molecular weight materials, produces fractions having dispersities of 1.5 or less. Circle No. 45
Poragel® A rigid porous polymer used to separate small species by molecular size. For separations in the 20-25,000 molecular weight range. Circle No. 52
4372A
AOAA Performs bio-organic acid analyses automatically, in as little as 40 minutes. High sensitivity eliminates the need for deproteinization or preliminary extraction. Circle No. 48
WATERS ASSOCIATES
