INDEX TO ADVERTISERS IN THIS ISSUE
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Varian Associates, Aerograph Division Chiat/Day, Inc. °Varian Associates, Analytical Instru ments Div Chiat/Day, Inc. Vision Laboratories, Inc
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Los Angeles 90045 . . . Clay S. Holden, Lynn Gaskill, Reinhold Publishing Corp., Airport Arcade Building, 8820 S. Sepulveda Blvd., Suite 215. Tel. No. 213-7760552.
University of Minnesota West Coast Technical Service
°Unitron Instrument Co Van Christie Associates, Inc.
Waters Associates, Inc Thomas R. Sundheim, Inc.
Advertising Management for the American Chemical Society Publications
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REINHOLD PUBLISHING CORP. A subsidiary of Litton Publications, Robert N. Sillars, Jr., General Manager, ACS Publications Division : 600 Summer St., Stamford, Conn. 06904. Phone 203-348-7531. Cable Address: REINPUB STAMFORDCONNECTICUT ADVERTISING SALES MANAGER-EAST J, Barry Stanford
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Dallas 75207 . . . Parker Harris, Roy Mc Donald Associates, Inc., Stemmons Tower West, 214-637-2444 Denver 80203 . . . Robert H, Heidersbach, Roy McDonald Associates, Inc., 846 Lin coln St., 303-825-3325
ADVERTISING SALES MANAGER-WEST Laurence O. Roberts «Carl Zeiss, Inc Michel-Cather, Inc.
San Francisco 94109 . . . Clay S. Holden, Lynn Gaskill, Reinhold Publishing Corp., 415-421-8080
Houston 77006 . . . Frank N. Vickrey, Richard Clothier, Roy McDonald Associates, Inc., 3130 Southwest Freeway, 713-529-6711
22 SCIENTIFIC PRODUCTS SPECIALISTS Stamford Connecticut 06904 . . . J. Barry Stanford, Harold I. Shields, Jr., Murray Strelitz, Reinhold Publishing Corp., 600 Summer St., 203-348-7531
Laboratory Supply Center Burdick & Jackson Laboratories, Inc Corco Chemical Corp. Eastern Chemical Corp. GCA Corp., Technology Oiv. LaMont Laboratories LaMotte Chemical Products Co. Quartz Scientific, Inc. Southwestern Analytical Chemicals Stanford Glassblowing Labs, Inc.
Philadelphia 19107 . . . James A. Byrne, Reinhold Publishing Corp., 12 So. 12th St., 215-922-0346
Great Britain and Western Europe . . . Brayton Nichols, The American Maga zine Group, 44 Conduit Street, London, W. 1, England Japan . . . Sumio Oka, International Media Representatives, Ltd., 1, Shiba-Kotohiracho, Minatoku, Tokyo
Chicago 60603 . . . Laurence O. Roberts, Eugene P. Eldridge, Reinhold Publishing Corp., 10 So. La Salle St., 312-726-1282 Cleveland 44114 . . . James C. May wait, Rein hold Publishing Corp., East Ohio Bldg., 1717 East 9th St., 216-771-4011
Production Director Joseph M. Scanlon Advertising Production Manager Daniel H. Desimone
*See ad in ACS Laboratory Guide
MEET THE
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BEAKER BUTLER
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V PAYS FOR ITSELF IN ABOUT 400 HOURS. V FULLY AUTOMATIC PRESENTATION MEANS UNIFORM, CONTROLLED CON SISTENCY. V ELEVATES BEAKERS TO IMMERSE ALL TYPES OF METERING DEVICES. V FREES PERSONNEL FOR OTHER WORK. fifty 100 ml beakers/tray · separate timers for settling period and recorder actuation · built-in stirrer and probe stand · optional wash cycle · auto or manual mode ·
VISION LABS, INC.
Modern Coulometry with Modern Instrumentation
Controlled-Potential Coulometer System Model 3 $3906.25
• 0.1% Accuracy and Precision with mg amounts of: Ag As Au Br- Cd Cl~ Cr Cu Eu Fe H202 l~ In Ir Mn Mo Ni N3- Np Pb Pu Ru Sb Sn Tc Tl U V Zn Numerous organic compounds φ Preparative Electrolysis φ Mechanistic and Formal E° Studies
• Condensed Specifications: POTENTIOSTAT—Output: ± 24V, ± 400mA, Ζ = 1 ohm DCO.L. Gain = 105, fc = 750kHz, adjustable response Zero Stability: ± 0.5 mV long term INTEGRATOR—Ranges: 1.9 and 19 coulombs Drift: ± 0.5 mV/15 min., stable long term Calibration Stability: ± 0.1%/year
ORISKANY, N.Y. 13424 We would like ίο consider your other developmental or modification needs.
315-736-0580 Circle No. 143 on Readers' Service Card
Premium quality, solid-state components for long-term reliability and stability Simplified controls Direct readout(1 volt = lmg) Self-checking configuration Modular, plug-in Potentiostat and Integrator available separately Negligible zero drifts
M-T ELECTRONICS CO.
M-T
536-A Lewelling Blvd.
San Leandro, Calif. 94579 Phone 415/357-5262 Circle No. 86 on Readers' Service Card
A N A L Y T I C A L CHEMISTRY, VOL. 4 2 , N O . 7, J U N E 1 9 7 0 ·
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