Porapak S: 80-100 Mesh 6' x 1/16" o.d. at 275°C Flow Rate: 75cc/min. He
INDEX TO ADVERTISERS IN THIS ISSUE "Labindustries Bonfield Associates, Inc. E. Leitz, Inc L. W. Frohlich & Co.
I. 2. 3. 4. 5.
WATER METHANOL ETHANOL n-PROPANOL n-BUTANOL
6. 7. 8. 9.
. . . still just a word to you? Find out why it's already the word to thousands of
°Orion Research, Inc Visual Research & Design Corp. Orlando Research Corp Neals & Hickok, Inc. Owens-Illinois, Inc Meldrum & Fewsmith, Inc.
If you haven't yet tried Porapak®, treat yourself to the original porous polymer column packings that revolutionized GC resolution and speed just three years ago. • Water elutes as a sharp peak. • Needs no liquid coating, but produces quality separations you'd expect from liquid-coated packings. • No bleed, no need for compensating temperature programming. • Highly reproducible peaks and retention times. • Now 8 types, including two silanized versions, for separating the widest range of polar and non-polar materials. • Temperature-stable up to 250° and above. • Very fast overload recovery. • Won't fracture; easy to pack, perfect for high-pressure systems. Porapak is manufactured only by Waters. Write or call for complete information, including the name of your nearest distributor. Waters Associates, Inc., 61 Fountain St., Framingham, Mass. 01701. Phone (617)879-2000.
128 A •
ANALYTICAL CHEMISTRY
95:96
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1967
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1967
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Packard Instrument Co., Inc. A Subsidiary of Ambac Industries, Inc.. 12 Ross Llewellyn, Inc. Peninsular Chemresearch. Inc 116 Advertising Associates of Jacksonville, Inc. oPerkln-Elmer Corp 34:61:107 Gaynor & Ducas, Inc. "Pharmacia Fine Chemicals, Inc 36 Cummins, MacFail & Nutry, Inc. °Photovolt Corp 5 Michel-Cather, Inc. "Pierce Chemical Co 115 Advertising Design Pitchford Mfg. Corp 130 "Polyscience Corp 124 Precision Scientific Co 57 Tri-State Advertising Co., Inc. Precision Sampling Corp 108 William U. Stracener Princeton Applied Research Corp 89 Mort Barish Associates, Inc. Professional Tape Co., Inc 125 Robert Peterson Advertising Agency
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"Sadtler Research Laboratories, I n c . . . 105 Product Promotions Agency, Inc. "Sage Instruments, Inc 83 Mohr & Co., Inc. °Sargent-Welch Scientific Co 58:97 Sidney Clayton & Associates, Inc.
°See ad in ACS Laboratory
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I "Nalgene Labware Div., Nalge Co., Div. of Sybron Corp 55 Wolff Associates, Inc. j Norton Plastics & Synthetics Div 74 Northlich, Stolley of Akron, Inc. "Nuclear-Chicago Corp., A Subsidiary of G. D. Searle & Co 18 Sidney Clayton Associates, Inc. Nuclear Data, Inc 9 Sang & Wardrop, Inc. Nuclear Diodes, Inc 119 Nupro Co IBC Falls Advertising Co.
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64
Manostat Corp 122 j Fairfax, Inc. Matheson, Coleman and Bell 114 Cooper, Strock & Scannell, Inc. Matheson Gas Products (A Div. of Will Ross, Inc.) 56 Cooper, Strock & Scannell, Inc. McKee-Pedersen Instruments 91 Dave Comstock Advertising *Mettler Instrument Corp 10:60:95:123 Mort Barish Associates, Inc. Milton Roy Co 74:75 Beaumont, Heller & Sperling, Inc. Molded Products, United Elastic Div. of J. P. Stevens Co., Inc 125 Albert L. Gibney Co.
n-PENTANOL n-HEXANOL n-HEPTANOL. n-OCTANOL
Porapak
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